def nb_iot_connect(lte: LTE):
sys.stdout.write(">> connecting to LTE network")
lte.connect() # start a data session and obtain an IP address
i = 0
while not lte.isconnected() and i < 30:
machine.idle() # save power while waiting
time.sleep(1.0)
sys.stdout.write(".")
i += 1
print("")
if not lte.isconnected():
raise Exception("unable to connect to LTE network")
print("-- connected ({}s)".format(i))
def lte_connect():
lte = LTE()
lte.init()
#some carriers have special requirements, check print(lte.send_at_cmd("AT+SQNCTM=?")) to see if your carrier is listed.
#when using verizon, use
#lte.init(carrier=verizon)
#when usint AT&T use,
#lte.init(carrier=at&t)
#some carriers do not require an APN
#also, check the band settings with your carrier
lte.attach(band=2, apn="vzwinternet")
print("attaching..", end='')
while not lte.isattached():
time.delay(0.25)
print('.', end='')
print(lte.send_at_cmd('AT!="fsm"')) # get the System FSM
print("attached!")
lte.connect()
print("connecting [##", end='')
while not lte.isconnected():
time.sleep(0.25)
print('#', end='')
#print(lte.send_at_cmd('AT!="showphy"'))
print(lte.send_at_cmd('AT!="fsm"'))
print("] connected!")
print(socket.getaddrinfo('pycom.io', 80))
lte.deinit()
def lte_setup(lte: LTE, connect: bool, apn: str or None):
print(">> initializing LTE")
lte.init()
if connect:
if not lte.isattached():
nb_iot_attach(lte, apn)
if not lte.isconnected():
nb_iot_connect(lte)
def lte_shutdown(lte: LTE, detach=True):
if lte.isconnected():
print(">> disconnecting LTE")
lte.disconnect()
if detach and lte.isattached():
print(">> detaching LTE")
lte.detach()
print(">> de-initializing LTE")
lte.deinit(detach=False, reset=False)
def sendData(dataList, deviceKey):
# ******************** Hologram endpoint Definition
HOST = "cloudsocket.hologram.io"
PORT = 9999
TOPIC = "SENSOR_DATA"
blink(1, 0xffffff) # blink white
# Set up LTE connection
lte = LTE()
lte.init()
print("Resetting LTE modem ... ", end="")
lte.send_at_cmd('AT^RESET')
print("Reset OK")
time.sleep(1)
# While the configuration of the CGDCONT register survives resets,
# the other configurations don't. So just set them all up every time.
print("Configuring LTE ", end='')
# Changed this from origninal
lte.send_at_cmd('AT+CGDCONT=1,"IP","hologram"')
print(".", end='')
# changed band from 28 to 4. I dont know what earfcn=9410 is;
lte.send_at_cmd('AT!="RRC::addscanfreq band=4 dl-earfcn=9410"')
print(".", end='')
# lte.send_at_cmd
# Do the attach (Enable radio functionality and attach to the LTE network authorized by the inserted SIM card)
lte.attach()
print("attaching..", end='')
while not lte.isattached():
blink(1, 0x0000ff) # blue
print('.', end='')
# print(lte.send_at_cmd('AT!="fsm"')) # get the System FSM
print("attached!")
# Do the connect (Start a data session and obtain and IP address)
lte.connect()
print("connecting [##", end='')
while not lte.isconnected():
time.sleep(1)
print('#', end='')
print("] connected!")
blink(1, 0x00ff00) # Green
# **** Send data to hologram
bodyData = buildData(dataList)
lteSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
lteSocket.connect(socket.getaddrinfo(HOST, PORT)[0][-1])
data = '{"k": "%s", "d": "{%s}", "t": "%s"}' % (deviceKey, bodyData, TOPIC)
print("Send Data:", data)
lteSocket.send(data)
# Clean up and close connection
lteSocket.close()
lte.deinit()
print("Disconnected")
blink(1, 0xff0000) # red
class LteController:
def __init__(self):
self._lte = LTE()
self._lte.attach()
while not self._lte.isattached():
time.sleep(1)
self._lte.connect()
while not self._lte.isconnected():
time.sleep(1)
print(self._lte.isattached())
print(self._lte.isconnected())
def canSend(self):
"""return true if interface can send data, false otherwise"""
return self._lte.isconnected()
def send(self, data):
"""attempts to send via interface, returns success status"""
return False
class Connection:
def __init__(self):
self.lte = LTE()
def nb_connect(self, band=20, apn="nb.inetd.gdsp"):
counter1 = 0
counter2 = 0
if not self.lte.isattached():
print("Attaching to LTE...")
self.lte.attach(band=band, apn=apn)
while not self.lte.isattached():
counter1 += 1
print(str(counter1) + ' seconds elapsed')
if counter1 >= 50:
import machine
machine.reset()
time.sleep(1)
if not self.lte.isconnected():
print("Obtaining IP address...")
self.lte.connect()
while not self.lte.isconnected():
counter2 += 1
print(str(counter2) + ' seconds elapsed')
time.sleep(0.25)
print("Network ready ...")
def nb_disconnect(self):
if self.lte.isconnected():
self.lte.disconnect()
while self.lte.isattached():
try:
self.lte.dettach()
except OSError as e:
print(e, type(e))
else:
print("Network is now disconnected")
def get_LTE():
global lte
if lte == None:
lte = LTE()
if lte.isconnected():
return True
# lte.reset()
# lte.send_at_cmd('AT+CGDCONT=1,"IP","nbiot.iot"')
if (not lte.isattached()):
lte.attach(band=20, apn="nbiot.iot")
while not lte.isattached():
debugprint('Attaching...')
time.sleep(1)
debugprint('LTE is attached')
return True
def get_imsi(lte: LTE) -> str:
"""
Get the international mobile subscriber identity (IMSI) from SIM
"""
IMSI_LEN = 15
get_imsi_cmd = "AT+CIMI"
print("\n>> getting IMSI")
modem_suspended = False
if lte.isconnected():
lte.pppsuspend()
modem_suspended = True
result = _send_at_cmd(lte, get_imsi_cmd)
if modem_suspended:
lte.pppresume()
if result[-1] == 'OK' and len(result[0]) == IMSI_LEN:
return result[0]
raise Exception("getting IMSI failed: {}".format(repr(result)))
def connect():
global lte
lte = LTE() # instantiate the LTE object
# Change this if you are using the M1 network (comment out the next 6 lines)
lte.send_at_cmd('AT+CFUN=0')
lte.send_at_cmd('AT+CEMODE=0')
lte.send_at_cmd('AT+CEMODE?')
lte.send_at_cmd('AT!="clearscanconfig"')
lte.send_at_cmd('AT!="addscanfreq band=20 dl-earfcn=6352"')
lte.send_at_cmd('AT+CFUN=1')
# End change this ....
lte.attach() # attach the cellular modem to a base station
while not lte.isattached():
time.sleep(0.25)
print("attatched")
lte.connect() # start a data session and obtain an IP address
while not lte.isconnected():
time.sleep(0.25)
print("connected")
def connect(timeout=30, lte=None):
if lte is None:
lte = LTE() # instantiate the LTE object
lte.attach() # attach the cellular modem to a base station
cycles = 0
while not lte.isattached():
sleep(1)
cycles += 1
if cycles > timeout:
raise Exception("Failed to attach cellular modem to base station")
lte.connect() # start a data session and obtain an IP address
cycles = 0
while not lte.isconnected():
sleep(1)
cycles += 1
if cycles > timeout:
raise Exception("Failed to obtain cellular data session")
return lte
def set_modem_func_lvl(lte: LTE, func_lvl: int):
"""
Sets modem to the desired level of functionality
Throws exception if operation fails.
:param func_lvl: the functionality level (0: minimum,
1: full,
4: disable modem both transmit and receive RF circuits)
"""
get_func_cmd = "AT+CFUN?"
set_func_cmd = "AT+CFUN={}".format(func_lvl)
print("\n>> setting up modem")
modem_suspended = False
if lte.isconnected():
lte.pppsuspend()
modem_suspended = True
# check if modem is already set to the correct functionality level
result = _send_at_cmd(lte, get_func_cmd)
if result[-1] == 'OK' and result[-2] == '+CFUN: {}'.format(func_lvl):
if modem_suspended:
lte.pppresume()
return
# set modem functionality level
result = _send_at_cmd(lte, set_func_cmd)
if result[-1] == 'OK':
# check if modem is set and ready
result = _send_at_cmd(lte, get_func_cmd)
if result[-1] == 'OK' and result[-2] == '+CFUN: {}'.format(func_lvl):
if modem_suspended:
lte.pppresume()
return
if modem_suspended:
lte.pppresume()
raise Exception("setting up modem failed: {}".format(repr(result)))
class PybytesConnection:
def __init__(self, config, message_callback):
if config is not None:
self.__conf = config
try:
self.__host = pycom.nvs_get('pybytes_server')
except:
self.__host = config.get('server')
self.__ssl = config.get('ssl', False)
self.__ssl_params = config.get('ssl_params', {})
self.__user_name = config.get('username')
self.__device_id = config.get('device_id')
self.__mqtt_download_topic = "d" + self.__device_id
self.__mqtt_upload_topic = "u" + self.__device_id
self.__pybytes_protocol = PybytesProtocol(
config, message_callback, pybytes_connection=self
)
self.__connection = None
self.__connection_status = constants.__CONNECTION_STATUS_DISCONNECTED
self.__lora_socket = None
self.lora = None
self.lora_lock = _thread.allocate_lock()
self.__sigfox_socket = None
self.lte = None
self.wlan = None
self.__network_type = None
self.__wifi_lte_watchdog = None
def lte_ping_routine(self, delay):
while True:
self.send_ping_message()
time.sleep(delay)
def print_pretty_response(self, rsp):
lines = rsp.split('\r\n')
for line in lines:
if line:
if line not in ['OK']:
print(line)
def __initialise_watchdog(self):
if self.__conf.get('connection_watchdog', True):
self.__wifi_lte_watchdog = WDT(
timeout=constants.__WDT_TIMEOUT_MILLISECONDS
)
print('Initialized watchdog for WiFi and LTE connection with timeout {} ms'.format(constants.__WDT_TIMEOUT_MILLISECONDS)) # noqa
else:
print('Watchdog for WiFi and LTE was disabled, enable with "connection_watchdog": true in pybytes_config.json') # noqa
# Establish a connection through WIFI before connecting to mqtt server
def connect_wifi(self, reconnect=True, check_interval=0.5, timeout=120):
self.__initialise_watchdog()
if self.__connection_status != constants.__CONNECTION_STATUS_DISCONNECTED: # noqa
print("Error connect_wifi: Connection already exists. Disconnect First") # noqa
return False
try:
from network import WLAN
antenna = self.__conf.get('wlan_antenna', WLAN.INT_ANT)
known_nets = [((self.__conf['wifi']['ssid'], self.__conf['wifi']['password']))] # noqa
if antenna == WLAN.EXT_ANT:
print("WARNING! Using external WiFi antenna.")
'''to connect it to an existing network,
the WiFi class must be configured as a station'''
self.wlan = WLAN(mode=WLAN.STA, antenna=antenna)
attempt = 0
print_debug(3, 'WLAN connected? {}'.format(self.wlan.isconnected()))
while not self.wlan.isconnected() and attempt < 3:
attempt += 1
print_debug(3, "Wifi connection attempt: {}".format(attempt))
print_debug(3, 'WLAN connected? {}'.format(self.wlan.isconnected()))
available_nets = None
while available_nets is None:
try:
available_nets = self.wlan.scan()
for x in available_nets:
print_debug(5, x)
time.sleep(1)
except:
pass
nets = frozenset([e.ssid for e in available_nets])
known_nets_names = frozenset([e[0]for e in known_nets])
net_to_use = list(nets & known_nets_names)
try:
net_to_use = net_to_use[0]
pwd = dict(known_nets)[net_to_use]
sec = [e.sec for e in available_nets if e.ssid == net_to_use][0] # noqa
print_debug(99, "Connecting with {} and {}".format(net_to_use, pwd))
if sec == 0:
self.wlan.connect(net_to_use, timeout=10000)
else:
self.wlan.connect(net_to_use, (sec, pwd), timeout=10000)
start_time = time.time()
while not self.wlan.isconnected():
if time.time() - start_time > timeout:
raise TimeoutError('Timeout trying to connect via WiFi')
time.sleep(0.1)
except Exception as e:
if str(e) == "list index out of range" and attempt == 3:
print("Please review Wifi SSID and password inside config")
self.wlan.deinit()
return False
elif attempt == 3:
print("Error connecting using WIFI: %s" % e)
return False
self.__network_type = constants.__NETWORK_TYPE_WIFI
print("WiFi connection established")
try:
self.__connection = MQTTClient(
self.__device_id,
self.__host,
self.__mqtt_download_topic,
self.__pybytes_protocol,
user=self.__user_name,
password=self.__device_id
)
self.__connection.connect()
self.__connection_status = constants.__CONNECTION_STATUS_CONNECTED_MQTT_WIFI # noqa
self.__pybytes_protocol.start_MQTT(
self,
constants.__NETWORK_TYPE_WIFI
)
return True
except Exception as ex:
if '{}'.format(ex) == '4':
print('MQTT ERROR! Bad credentials when connecting to server: "{}"'.format(self.__host)) # noqa
else:
print("MQTT ERROR! {}".format(ex))
return False
except Exception as ex:
print("Exception connect_wifi: {}".format(ex))
return False
# Establish a connection through LTE before connecting to mqtt server
def connect_lte(self, activation_info=False, start_mqtt=True):
if activation_info:
lte_cfg = activation_info
else:
lte_cfg = self.__conf.get('lte')
self.__initialise_watchdog()
if lte_cfg is not None:
if (os.uname()[0] not in ['FiPy', 'GPy']):
print("You need a device with FiPy or GPy firmware to connect via LTE") # noqa
return False
try:
from network import LTE
time.sleep(3)
if lte_cfg.get('carrier', 'standard') == 'standard':
carrier = None
else:
carrier = lte_cfg.get('carrier')
print_debug(1, 'LTE init(carrier={}, cid={})'.format(carrier, lte_cfg.get('cid', 1))) # noqa
# instantiate the LTE object
self.lte = LTE(carrier=carrier, cid=lte_cfg.get('cid', 1))
try:
lte_type = lte_cfg.get('type') if len(lte_cfg.get('type')) > 0 else None
except:
lte_type = None
try:
lte_apn = lte_cfg.get('apn') if len(lte_cfg.get('type')) > 0 else None
except:
lte_apn = None
try:
lte_band = int(lte_cfg.get('band'))
except:
lte_band = None
print_debug(
1,
'LTE attach(band={}, apn={}, type={})'.format(
lte_band,
lte_apn,
lte_type
)
)
self.lte.attach(band=lte_band, apn=lte_apn, type=lte_type) # noqa # attach the cellular modem to a base station
while not self.lte.isattached():
time.sleep(0.25)
time.sleep(1)
print_debug(1, 'LTE connect()')
# start a data session and obtain an IP address
self.lte.connect()
print_debug(1, 'LTE is_connected()')
while not self.lte.isconnected():
time.sleep(0.25)
print("LTE connection established")
self.__network_type = constants.__NETWORK_TYPE_LTE
if start_mqtt:
try:
self.__connection = MQTTClient(
self.__device_id,
self.__host,
self.__mqtt_download_topic,
self.__pybytes_protocol,
user=self.__user_name,
password=self.__device_id
)
self.__connection.connect()
self.__connection_status = constants.__CONNECTION_STATUS_CONNECTED_MQTT_LTE # noqa
self.__pybytes_protocol.start_MQTT(
self,
constants.__NETWORK_TYPE_LTE
)
print("Connected to MQTT {}".format(self.__host))
return True
except Exception as ex:
if '{}'.format(ex) == '4':
print('MQTT ERROR! Bad credentials when connecting to server: "{}"'.format(self.__host)) # noqa
else:
print("MQTT ERROR! {}".format(ex))
return False
except Exception as ex:
print("Exception connect_lte: {}".format(ex))
sys.print_exception(ex)
return False
else:
print("Error... missing configuration!")
return False
# LORA
def connect_lora_abp(self, lora_timeout, nanogateway):
print_debug(1,'Attempting to connect via LoRa')
if (self.__connection_status != constants.__CONNECTION_STATUS_DISCONNECTED): # noqa
print("Error connect_lora_abp: Connection already exists. Disconnect First") # noqa
return False
try:
from network import LoRa
except Exception as ex:
print("This device does not support LoRa connections: %s" % ex)
return False
lora_class = self.__conf.get('lora', {}).get('class', 0)
if self.__conf.get('lora', {}).get('region') is not None:
self.lora = LoRa(mode=LoRa.LORAWAN, region=self.__conf.get('lora').get('region'), device_class=lora_class)
else:
self.lora = LoRa(mode=LoRa.LORAWAN, device_class=lora_class)
self.lora.nvram_restore()
try:
dev_addr = self.__conf['lora']['abp']['dev_addr']
nwk_swkey = self.__conf['lora']['abp']['nwk_skey']
app_swkey = self.__conf['lora']['abp']['app_skey']
except Exception as ex:
print("Invalid LoRaWAN ABP configuration!")
print_debug(1, ex)
return False
timeout_ms = self.__conf.get('lora_timeout', lora_timeout) * 1000
dev_addr = struct.unpack(">l", binascii.unhexlify(dev_addr.replace(' ', '')))[0] # noqa
nwk_swkey = binascii.unhexlify(nwk_swkey.replace(' ', ''))
app_swkey = binascii.unhexlify(app_swkey.replace(' ', ''))
try:
print("Trying to join LoRa.ABP for %d seconds..." % self.__conf.get('lora_timeout', lora_timeout))
self.lora.join(
activation=LoRa.ABP,
auth=(dev_addr, nwk_swkey, app_swkey),
timeout=timeout_ms
)
# if you want, uncomment this code, but timeout must be 0
# while not self.lora.has_joined():
# print("Joining...")
# time.sleep(5)
self.__open_lora_socket(nanogateway)
# print_debug(5, 'Stack size: {}'.format(self.__thread_stack_size))
# _thread.stack_size(self.__thread_stack_size)
# _thread.start_new_thread(self.__check_lora_messages, ())
return True
except Exception as e:
message = str(e)
if message == 'timed out':
print("LoRa connection timeout: %d seconds" % self.__conf.get('lora_timeout', lora_timeout))
else:
print_debug(3, 'Exception in LoRa connect: {}'.format(e))
return False
def connect_lora_otaa(self, lora_timeout, nanogateway):
print_debug(1,'Attempting to connect via LoRa')
if (self.__connection_status != constants.__CONNECTION_STATUS_DISCONNECTED): # noqa
print("Error connect_lora_otaa: Connection already exists. Disconnect First") # noqa
return False
try:
from network import LoRa
except Exception as ex:
print("This device does not support LoRa connections: %s" % ex)
return False
try:
dev_eui = self.__conf['lora']['otaa']['app_device_eui']
app_eui = self.__conf['lora']['otaa']['app_eui']
app_key = self.__conf['lora']['otaa']['app_key']
except Exception as ex:
print("Invalid LoRaWAN OTAA configuration!")
print_debug(1, ex)
return False
timeout_ms = self.__conf.get('lora_timeout', lora_timeout) * 1000
lora_class = self.__conf.get('lora', {}).get('class', 0)
if self.__conf.get('lora', {}).get('region') is not None:
self.lora = LoRa(mode=LoRa.LORAWAN, region=self.__conf.get('lora', {}).get('region'), device_class=lora_class)
else:
self.lora = LoRa(mode=LoRa.LORAWAN, device_class=lora_class)
self.lora.nvram_restore()
dev_eui = binascii.unhexlify(dev_eui.replace(' ', ''))
app_eui = binascii.unhexlify(app_eui.replace(' ', ''))
app_key = binascii.unhexlify(app_key.replace(' ', ''))
try:
if not self.lora.has_joined():
print("Trying to join LoRa.OTAA for %d seconds..." % self.__conf.get('lora_timeout', lora_timeout))
self.lora.join(
activation=LoRa.OTAA,
auth=(dev_eui, app_eui, app_key),
timeout=timeout_ms
)
# if you want, uncomment this code, but timeout must be 0
# while not self.lora.has_joined():
# print("Joining...")
# time.sleep(5)
self.__open_lora_socket(nanogateway)
# print_debug(5, 'Stack size: {}'.format(self.__thread_stack_size))
# _thread.stack_size(self.__thread_stack_size)
# _thread.start_new_thread(self.__check_lora_messages, ())
return True
except Exception as e:
message = str(e)
if message == 'timed out':
print("LoRa connection timeout: %d seconds" % self.__conf.get('lora_timeout', lora_timeout))
else:
print_debug(3, 'Exception in LoRa connect: {}'.format(e))
return False
def __open_lora_socket(self, nanogateway):
if (nanogateway):
for i in range(3, 16):
self.lora.remove_channel(i)
self.lora.add_channel(0, frequency=868100000, dr_min=0, dr_max=5)
self.lora.add_channel(1, frequency=868100000, dr_min=0, dr_max=5)
self.lora.add_channel(2, frequency=868100000, dr_min=0, dr_max=5)
print("Setting up LoRa socket...")
self.__lora_socket = socket.socket(socket.AF_LORA, socket.SOCK_RAW)
self.__lora_socket.setsockopt(socket.SOL_LORA, socket.SO_DR, 5)
self.__connection_status = constants.__CONNECTION_STATUS_CONNECTED_LORA
self.__pybytes_protocol.start_Lora(self)
print("Connected using LoRa")
# SIGFOX
def connect_sigfox(self):
if (self.__connection_status != constants.__CONNECTION_STATUS_DISCONNECTED): # noqa
print("Error: Connection already exists. Disconnect First")
pass
try:
from network import Sigfox
except Exception:
print("This device does not support Sigfox connections")
return
sigfox_config = self.__conf.get('sigfox', {})
if sigfox_config is None or sigfox_config.get('RCZ') is None:
print(constants.__SIGFOX_WARNING)
try:
sf_rcz = int(sigfox_config.get('RCZ', 1)) - 1
if sf_rcz >= 0 and sf_rcz <= 3:
Sigfox(mode=Sigfox.SIGFOX, rcz=sf_rcz)
self.__sigfox_socket = socket.socket(socket.AF_SIGFOX, socket.SOCK_RAW) # noqa
self.__sigfox_socket.setblocking(True)
self.__sigfox_socket.setsockopt(socket.SOL_SIGFOX, socket.SO_RX, False) # noqa
self.__network_type = constants.__NETWORK_TYPE_SIGFOX
self.__connection_status = constants.__CONNECTION_STATUS_CONNECTED_SIGFOX # noqa
self.__pybytes_protocol.start_Sigfox(self)
print(
"Connected using Sigfox. Only upload stream is supported"
)
return True
else:
print('Invalid Sigfox RCZ specified in config!')
return False
except Exception as e:
print('Exception in connect_sigfox: {}'.format(e))
return False
# COMMON
def disconnect(self, keep_wifi=False, force=False):
if self.__wifi_lte_watchdog is not None:
self.__wifi_lte_watchdog = WDT(timeout=constants.__WDT_MAX_TIMEOUT_MILLISECONDS)
print('Watchdog timeout has been increased to {} ms'.format(constants.__WDT_MAX_TIMEOUT_MILLISECONDS)) # noqa
print_debug(
1,
'self.__connection_status={} | self.__network_type={}'.format(
self.__connection_status, self.__network_type
)
)
if (self.__connection_status == constants.__CONNECTION_STATUS_DISCONNECTED): # noqa
print_debug(3, "Already disconnected")
if (constants.__CONNECTION_STATUS_CONNECTED_MQTT_WIFI <= self.__connection_status <= constants.__CONNECTION_STATUS_CONNECTED_MQTT_LTE): # noqa
print_debug(1, 'MQTT over WIFI||LTE... disconnecting MQTT')
try:
self.__connection.disconnect(force=force)
self.__connection_status = constants.__CONNECTION_STATUS_DISCONNECTED # noqa
except Exception as e:
print("Error disconnecting: {}".format(e))
if (self.__connection_status == constants.__CONNECTION_STATUS_CONNECTED_LORA): # noqa
print_debug(1, 'Connected over LORA... closing socket and saving nvram') # noqa
try:
self.__lora_socket.close()
self.lora.nvram_save()
except Exception as e:
print("Error disconnecting: {}".format(e))
if (self.__connection_status == constants.__CONNECTION_STATUS_CONNECTED_SIGFOX): # noqa
print_debug(1, 'Connected over SIGFOX... closing socket')
try:
self.__sigfox_socket.close()
except Exception as e:
print("Error disconnecting: {}".format(e))
if (self.__network_type == constants.__NETWORK_TYPE_WIFI and not keep_wifi):
print_debug(1, 'Connected over WIFI... disconnecting')
try:
self.wlan.deinit()
except Exception as e:
print("Error disconnecting: {}".format(e))
if (self.__network_type == constants.__NETWORK_TYPE_LTE):
print_debug(1, 'Connected over LTE... disconnecting')
try:
lte_cfg = self.__conf.get('lte')
print_debug(1, 'lte.deinit(reset={})'.format(lte_cfg.get('reset', False))) # noqa
self.lte.deinit(reset=lte_cfg.get('reset', False))
except Exception as e:
print("Error disconnecting: {}".format(e))
self.__network_type = None
self.__connection_status = constants.__CONNECTION_STATUS_DISCONNECTED
def is_connected(self):
return not (self.__connection_status == constants.__CONNECTION_STATUS_DISCONNECTED) # noqa
# Added for convention with other connectivity classes
def isconnected(self):
return not (self.__connection_status == constants.__CONNECTION_STATUS_DISCONNECTED) # noqa
send_at_cmd_pretty('AT!="RRC::addscanfreq band=20 dl-earfcn=6300"')
send_at_cmd_pretty('AT+CFUN=1')
pycom.heartbeat(False)
while not lte.isattached():
pycom.rgbled(0x7f0000)
time.sleep(0.1)
pycom.rgbled(0x000000)
time.sleep(0.5)
send_at_cmd_pretty('AT!="showphy"')
send_at_cmd_pretty('AT!="fsm"')
send_at_cmd_pretty('AT+CEREG?')
lte.connect()
while not lte.isconnected():
pycom.rgbled(0x7f7f00)
time.sleep(0.1)
pycom.rgbled(0x000000)
time.sleep(0.5)
print("waiting")
client = MQTTClient("client",
"domain",
user="******",
password="******",
port=port,
ssl=True)
i2c = I2C(0, I2C.MASTER, baudrate=100000, pins=('G9', 'G10'))
scanner = i2c.scan()
lte.send_at_cmd('AT+CFUN=1')\
print(" OK")\
\
# If correctly configured for carrier network, attach() should succeed.\
if not lte.isattached():\
print("Attaching to LTE network ", end='')\
lte.attach()\
while True:\
if lte.isattached():\
print(" OK")\
break\
print('.', end='')\
time.sleep(1)\
\
# Once attached, connect() should succeed.\
if not lte.isconnected():\
print("Connecting on LTE network ", end='')\
lte.connect()\
while(True):\
if lte.isconnected():\
print(" OK")\
break\
print('.', end='')\
time.sleep(1)\
\
# Once connect() succeeds, any call requiring Internet access will\
# use the active LTE connection.\
return lte\
\
# Clean disconnection of the LTE network is required for future\
# successful connections without a complete power cycle between.\
class StartIoT:
def __init__(self, network=LTE_M):
self._network = network
self.lte = LTE()
try:
self.lte.deinit()
self.lte.reset()
except:
pass
sleep(5)
self.lte.init()
sleep(5)
self._assure_modem_fw()
def _assure_modem_fw(self):
response = self.lte.send_at_cmd('ATI1')
if response != None:
lines = response.split('\r\n')
fw_id = lines[1][0:3]
is_nb = fw_id == 'UE6'
if is_nb:
print('Modem is using NB-IoT firmware (%s/%s).' % (lines[1], lines[2]))
else:
print('Modem in using LTE-M firmware (%s/%s).' % (lines[1], lines[2]))
if not is_nb and self._network == NB_IOT:
print('You cannot connect using NB-IoT with wrong modem firmware! Please re-flash the modem with the correct firmware.')
raise WrongNetwork
if is_nb and self._network == LTE_M:
print('You cannot connect using LTE-M with wrong modem firmware! Please re-flash the modem with the correct firmware.')
raise WrongNetwork
else:
print('Failed to determine modem firmware. Rebooting device...')
reset() # Reboot the device
def send_at_cmd_pretty(self, cmd):
print('>', cmd)
response = self.lte.send_at_cmd(cmd)
if response != None:
lines = response.split('\r\n')
for line in lines:
if len(line.strip()) != 0:
print('>>', line)
else:
print('>> No response.')
return response
def connect(self):
# NB-IoT
if (self._network == NB_IOT):
self.send_at_cmd_pretty('AT+CFUN=0')
self.send_at_cmd_pretty('AT+CEMODE=0')
self.send_at_cmd_pretty('AT+CEMODE?')
self.send_at_cmd_pretty('AT!="clearscanconfig"')
self.send_at_cmd_pretty('AT!="addscanfreq band=%s dl-earfcn=%s"' % (BAND, EARFCN))
self.send_at_cmd_pretty('AT+CGDCONT=1,"IP","%s"' % APN)
self.send_at_cmd_pretty('AT+COPS=1,2,"%s"' % COPS)
self.send_at_cmd_pretty('AT+CFUN=1')
# LTE-M (Cat M1)
else:
self.send_at_cmd_pretty('AT+CFUN=0')
self.send_at_cmd_pretty('AT!="clearscanconfig"')
self.send_at_cmd_pretty('AT!="addscanfreq band=%s dl-earfcn=%s"' % (BAND, EARFCN))
self.send_at_cmd_pretty('AT+CGDCONT=1,"IP","%s"' % APN)
self.send_at_cmd_pretty('AT+CFUN=1')
self.send_at_cmd_pretty('AT+CSQ')
# For a range scan:
# AT!="addscanfreqrange band=20 dl-earfcn-min=3450 dl-earfcn-max=6352"
print('Attaching...')
seconds = 0
while not self.lte.isattached() and seconds < attach_timeout:
sleep(0.25)
seconds += 0.25
if self.lte.isattached():
print('Attached!')
else:
print('Failed to attach to LTE (timeout)!')
raise AttachTimeout
self.lte.connect()
print('Connecting...')
seconds = 0
while not self.lte.isconnected() and seconds < connect_timeout:
sleep(0.25)
seconds += 0.25
if self.lte.isconnected():
print('Connected!')
else:
print('Failed to connect to LTE (timeout)!')
raise ConnectTimeout
def disconnect(self):
if self.lte.isconnected():
self.lte.disconnect()
def dettach(self):
if self.lte.isattached():
self.lte.dettach()
class SequansLTE:
"""
Synopsis::
sq = SequansLTE()
sq.info()
sq.firmware_info()
sq.at('showphy')
See also:
- https://git.cicer.de/autonome-zelle/fipy-nbiot-rtd/blob/master/main.py
"""
def __init__(self, network_manager, settings):
self.network_manager = network_manager
self.settings = settings
from network import LTE
self.lte = LTE()
import machine
self.chrono = machine.Timer.Chrono()
self.chrono.start()
def start(self):
self.lte.init()
self.attach()
self.connect()
def stop(self):
self.lte.disconnect()
time.sleep(0.25)
self.lte.deinit()
time.sleep(0.25)
def attach(self):
log.info('Attaching to LTE')
self.lte.attach(band=self.settings.get('networking.lte.band'),
apn=self.settings.get('networking.lte.apn'))
self.chrono.reset()
while True:
log.info('Signal strength: {}'.format(self.get_signal_strength()))
if self.lte.isattached():
break
if self.chrono.read() > self.settings.get(
'networking.lte.attach_timeout'):
raise Exception('Attaching to LTE timed out')
time.sleep(0.25)
def connect(self):
log.info('Connecting to LTE')
self.lte.connect()
self.chrono.reset()
while True:
if self.lte.isconnected():
break
if self.chrono.read() > self.settings.get(
'networking.lte.connect_timeout'):
raise Exception('Connecting to LTE timed out')
time.sleep(0.25)
def imei(self):
"""
Return IMEI.
"""
return self.at('AT+CGSN=1')
def info(self):
"""
Get infos from Modem.
"""
log.info('Signal strength: {}'.format(self.get_signal_strength()))
self.at('RRC:setDbgPerm full')
self.at('RRC:showcaps')
self.at('showver')
# https://forum.pycom.io/topic/4022/unable-to-update-gpy-modem-firmware/8
#self.at('AT')
#self.at('ATI')
#self.at('ATZ')
def get_signal_strength(self):
csq_at = self.lte.send_at_cmd("AT+CSQ")
csq_line_regex = ure.compile("\n")
csq_line = csq_line_regex.split(csq_at)
csq_string_regex = ure.compile(" ")
csq_string = csq_string_regex.split(csq_line[1])
csq_comma = csq_string[1]
csq_num_regex = ure.compile(",")
csq_num = csq_num_regex.split(csq_comma)
csq = csq_num[0]
return csq
def at(self, command):
"""
:param command:
"""
return self.raw('AT!="{}"'.format(command))
def raw(self, command):
"""
:param command:
"""
log.info('Sending: {}'.format(command))
answer = self.lte.send_at_cmd(command)
log.info('Answer: {}'.format(answer))
return answer
def firmware_info(self):
""" """
import sqnsupgrade
sqnsupgrade.info(verbose=True, debug=True)
def unbrick(self):
""" """
raise NotImplementedError(
'https://forum.pycom.io/topic/4022/unable-to-update-gpy-modem-firmware/21'
)
class LteComms:
def __init__(self):
self.message_storage = 'AT+CPMS="SM", "SM", "SM"'
gc.collect()
try:
self.lte = LTE()
time.sleep(4)
except:
print("initialize LTE object?")
self.lte.reset()
time.sleep(4)
print("delay 4 secs")
def at(self, cmd):
print("modem command: {}".format(cmd))
r = self.lte.send_at_cmd(cmd).split('\r\n')
r = list(filter(None, r))
print("response={}".format(r))
return r
def attach_LTE(self):
gc.collect()
time.sleep(10.0)
if self.lte.isattached():
try:
print("LTE was already attached, disconnecting...")
if self.lte.isconnected():
print("disconnect")
self.lte.disconnect()
except:
print("Exception during disconnect")
try:
if self.lte.isattached():
print("detach")
self.lte.dettach()
except:
print("Exception during dettach")
try:
print("resetting modem...")
self.lte.reset()
except:
print("Exception during reset")
print("delay 5 secs")
time.sleep(5.0)
# enable network registration and location information, unsolicited result code
self.at('AT+CEREG=2')
# print("full functionality level")
self.at('AT+CFUN=1')
time.sleep(1.0)
# using Hologram SIM
self.at('AT+CGDCONT=1,"IP","hologram"')
print("attempt to attach cell modem to base station...")
# lte.attach() # do not use attach with custom init for Hologram SIM
self.at("ATI")
time.sleep(2.0)
i = 0
while self.lte.isattached() == False:
# get EPS Network Registration Status:
# +CEREG: <stat>[,[<tac>],[<ci>],[<AcT>]]
# <tac> values:
# 0 - not registered
# 1 - registered, home network
# 2 - not registered, but searching...
# 3 - registration denied
# 4 - unknown (out of E-UTRAN coverage)
# 5 - registered, roaming
r = self.at('AT+CEREG?')
try:
r0 = r[0] # +CREG: 2,<tac>
r0x = r0.split(',') # ['+CREG: 2',<tac>]
tac = int(r0x[1]) # 0..5
print("tac={}".format(tac))
except IndexError:
tac = 0
print("Index Error!!!")
# get signal strength
# +CSQ: <rssi>,<ber>
# <rssi>: 0..31, 99-unknown
r = self.at('AT+CSQ')
# extended error report
# r =self.at('AT+CEER')
# if lte.isattached():
# print("Modem attached (isattached() function worked)!!!")
# break
# if (tac==1) or (tac==5):
# print("Modem attached!!!")
# break
i = i + 5
print("not attached: {} secs".format(i))
# while self.lte.isattached():
# # self.receive_and_forward_to_chat()
# continue
# print("Modem not attached")
print("set to check messages on sim")
self.at(self.message_storage)
def connect_lte_data(self):
self.at('AT+CEREG?')
print("Attempt to connect")
if self.lte.isattached() == False:
print("Not attached, try again, will fail")
else:
print("Attached and continue")
self.lte.connect()
i = 0
while not self.lte.isconnected():
i = i + 1
print("not connected: {}".format(i))
time.sleep(1.0)
print("LTE connected for data!!!") # also send this to chat
# so just pymesh this to all nodes in leader_mesh_list
while self.lte.isconnected():
continue
def scrape_webpage(self, url):
s = socket.socket()
s = ssl.wrap_socket(s)
s.connect(socket.getaddrinfo(url, 443)[0][-1])
s.send(b"GET / HTTP/1.0\r\n\r\n")
print(s.recv(4096))
s.close()
def send_sms(self, number, msg):
# this will somehow have to be connected to the chat with a JM msg1
print("set mode to text")
self.at('AT+CMGF=1')
time.sleep(.5)
# msg = ('AT+CMGS="%s"\r%s\0x1a' % (number, msg))
# print(('ATTB+SQNSMSSEND="%s", "%s"' % (number, msg)))
print('sendin an sms', end=' ')
ans = self.lte.send_at_cmd(
('AT+SQNSMSSEND="%s", "%s"' % (number, msg))).split('\r\n')
print(ans)
# self.at(msg)
time.sleep(4)
print("sent!")
def receive_and_forward_to_chat(self):
# this will somehow have to be connected to the chat with a JM msg1
print("set mode to text")
self.at('AT+CMGF=1')
msg_list = []
msg_list = self.at('AT+CMGL="ALL"')
number_of_messages = 0
if len(msg_list) > 1:
print("This'll print if there a msg")
if len(msg_list) > 20:
print("More then 10 messages, loop")
i = 1
while len(msg_list) > 20:
print("This is the inner loop running %s times" % i)
msg_list = self.at('AT+CMGL="ALL"')
number_of_messages += len(msg_list)
self.write_msg_to_file_and_delete(msg_list)
time.sleep(15)
i += 1
print("This is to get the last group of messages")
# you don't scan for messages while it sleep, almost Need
# to run this in a thread in the background.
time.sleep(10)
msg_list = self.at('AT+CMGL="ALL"')
number_of_messages += len(msg_list)
self.write_msg_to_file_and_delete(msg_list)
else:
print("The list is less than 10, so straight to file")
number_of_messages += len(msg_list)
self.write_msg_to_file_and_delete(msg_list)
else:
print("This prints when no messages")
self.at('AT+CMGD=1,4')
# Cuz apparently you need to clean out the sim card, it only holds 10 msgs
# at('AT+CMGD=1,4')
time.sleep(5)
actual_messages = (number_of_messages / 2) - 1
print(actual_messages)
def msg_parse(self, msg_list):
parsed_msg_list = []
msg_list_string = "".join(msg_list)
split_msg_list = msg_list_string.split('+CMGL:')
for i in range(len(split_msg_list)):
temp_string = str(split_msg_list[i])
if temp_string[-2:] == 'OK':
parsed_msg_list.append(temp_string[:-2])
else:
parsed_msg_list.append(temp_string)
return parsed_msg_list
def disconnect_LTE(self):
self.lte.disconnect()
print("LTE Data disconnected")
# send to chat
def unattach_lte(self):
self.lte.detach(reset=True)
print("LTE modem deattached")
def signal_strength(self):
self.at('AT+CSQ')
def check_read_sms(self):
self.at('AT+CMGF=1')
msg_list = self.at('AT+CMGL="ALL"')
print(msg_list)
def write_msg_to_file_and_delete(self, msg_list):
parsed_msg_list = self.msg_parse(msg_list)
print("Writing to SMS log")
f = open('/sd/www/sms.txt', 'a+')
for i in range(len(parsed_msg_list)):
if parsed_msg_list[i] != '\r\n':
f.write(str(parsed_msg_list[i]))
f.write('\r\n')
f.close()
self.at('AT+CMGD=1,4')
class StartIot():
def __init__(self):
self.lte = LTE()
self.initModem()
# METHOD FOR PRETTY PRINTING AT COMMANDS
def send_at_cmd_pretty(self, cmd):
response = self.lte.send_at_cmd(cmd)
if response != None:
lines=response.split('\r\n')
print("Response is:< ")
for line in lines:
if len(line.strip()) != 0:
print(line)
print(">")
else:
print("Response is None...")
return response
# SETUP AND START THE MODEM - ATTACH TO THE NETWORK
def initModem(self):
print ("Starting modem...")
self.send_at_cmd_pretty('AT+CFUN=0')
# Change this if you are using the NB1 network (uncomment the next 4 lines)
#self.send_at_cmd_pretty('AT+CEMODE=0')
#self.send_at_cmd_pretty('AT+CEMODE?')
#self.send_at_cmd_pretty('AT!="clearscanconfig"')
#self.send_at_cmd_pretty('AT!="addscanfreq band=20 dl-earfcn=6352"')
# End change this ....
self.send_at_cmd_pretty('AT+CGDCONT=1,"IP","mda.ee"')
self.send_at_cmd_pretty('AT+CFUN=1')
self.send_at_cmd_pretty('AT+CSQ')
print ("Waiting for attachement (To Radio Access Network)...")
while not self.lte.isattached():
time.sleep(0.25)
else:
print ("Attached (To Radio Access Network)...")
# CONNECT TO THE NETWORK
def connect(self):
if not self.lte.isattached():
raise Exception('NOT ATTACHED... call initModem() first')
print ("Waiting for connection (To IP network)...")
self.lte.connect()
# Wait until we get connected to network
while not self.lte.isconnected():
machine.idle()
print ("Connected (To IP network)!")
# OPEN SOCKET AND SEND DATA
def send(self, data):
if not self.lte.isconnected():
raise Exception('NOT CONNECTED')
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
IP_address = socket.getaddrinfo('172.16.15.14', 1234)[0][-1]
s.connect(IP_address)
s.send(data)
s.close()
def disconnect(self):
if self.lte.isconnected():
self.lte.disconnect()
def dettach(self):
if self.lte.isattached():
self.lte.dettach()
self.lte.send_at_cmd('AT+CFUN=0')
print("Modem offline")
def test_lte_ntp(hw, max_drift_secs=4):
_logger.info("Starting LTE test...")
pycom_util.reset_rgbled()
global failures
_logger.info("Testing LTE connectivity...")
chrono = machine.Timer.Chrono()
chrono.start()
with CheckStep(FLAG_SD_CARD, suppress_exception=True):
hw.mount_sd_card()
ou_id = None
cc = None
cs = None
with CheckStep(FLAG_COMM_CONFIG, suppress_exception=True):
import os
import co2unit_comm
os.chdir(hw.SDCARD_MOUNT_POINT)
ou_id, cc, cs = co2unit_comm.read_comm_config(hw)
with CheckStep(FLAG_TIME_SOURCE, suppress_exception=True):
hw.sync_to_most_reliable_rtc()
lte = None
signal_quality = None
try:
with CheckStep(FLAG_LTE_FW_API):
from network import LTE
with CheckStep(FLAG_LTE_INIT):
# _logger.info("Give LTE a moment to boot")
# LTE init seems to be successful more often if we give it time first
# time.sleep_ms(1000)
# wdt.feed()
_logger.info("Init LTE...")
chrono.reset()
pycom.nvs_set("lte_on", True)
lte = LTE()
_logger.info("LTE init ok (%d ms)", chrono.read_ms())
except:
return failures
try:
with CheckStep(FLAG_LTE_ATTACH):
_logger.info("LTE attaching... (up to 2 minutes)")
chrono.reset()
lte.attach()
try:
while True:
wdt.feed()
if lte.isattached(): break
if chrono.read_ms() > 150 * 1000:
raise TimeoutError("Timeout during LTE attach")
time.sleep_ms(50)
finally:
signal_quality = pycom_util.lte_signal_quality(lte)
_logger.info("Signal quality: %s", signal_quality)
import co2unit_errors
co2unit_errors.info(
hw,
"Self-test. LTE attached: {}. Signal quality {}".format(
lte.isattached(), signal_quality))
_logger.info("LTE attach ok (%d ms). Connecting...",
chrono.read_ms())
if signal_quality["rssi_raw"] in range(0, 31):
led_show_scalar(signal_quality["rssi_raw"], [0, 31])
with CheckStep(FLAG_LTE_CONNECT):
chrono.reset()
lte.connect()
while True:
wdt.feed()
if lte.isconnected(): break
if chrono.read_ms() > 120 * 1000:
raise TimeoutError("Timeout during LTE connect")
time.sleep_ms(50)
_logger.info("LTE connect ok (%d ms)", chrono.read_ms())
with CheckStep(FLAG_COMM_PING, suppress_exception=True):
import co2unit_comm
for sync_dest in cc.sync_dest:
co2unit_comm.send_alive_ping(sync_dest, ou_id, cc, cs)
wdt.feed()
with CheckStep(FLAG_NTP_FETCH, suppress_exception=True):
from machine import RTC
import timeutil
chrono.reset()
irtc = RTC()
ts = timeutil.fetch_ntp_time(cc.ntp_host if cc else None)
idrift = ts - time.mktime(irtc.now())
if abs(idrift) < max_drift_secs:
_logger.info("Drift from NTP: %s s; within threshold (%d s)",
idrift, max_drift_secs)
else:
ntp_tuple = time.gmtime(ts)
irtc = RTC()
irtc.init(ntp_tuple)
hw.ertc.save_time()
_logger.info("RTC set from NTP %s; drift was %d s", ntp_tuple,
idrift)
failures &= ~FLAG_TIME_SOURCE # Clear FLAG_TIME_SOURCE if previously set
_logger.info("Got time with NTP (%d ms). Shutting down...",
chrono.read_ms())
wdt.feed()
with CheckStep(FLAG_LTE_SHUTDOWN):
if lte:
try:
if lte.isconnected():
chrono.reset()
lte.disconnect()
_logger.info("LTE disconnected (%d ms)",
chrono.read_ms())
wdt.feed()
if lte.isattached():
chrono.reset()
lte.dettach()
_logger.info("LTE detached (%d ms)", chrono.read_ms())
wdt.feed()
finally:
chrono.reset()
lte.deinit()
pycom.nvs_set("lte_on", False)
_logger.info("LTE deinit-ed (%d ms)", chrono.read_ms())
wdt.feed()
except:
pass
show_boot_flags()
_logger.info("Failures after LTE test: 0x%04x", failures)
display_errors_led()
if signal_quality and signal_quality["rssi_raw"] in range(0, 32):
led_show_scalar(signal_quality["rssi_raw"], [0, 31])
pycom.rgbled(0x0)
from network import WLAN
wlan = WLAN()
print("wlan.isconnected", wlan.isconnected())
if wlan.isconnected():
print('IP:', wlan.ifconfig()[0])
try:
from network import LTE
lte = LTE()
print("imei", lte.imei())
print("lte.isconnected", lte.isconnected())
# print("ue_coverage", lte.ue_coverage())
except:
print("no LTE")
class DatacakeGateway:
def machine_callback(self, arg):
evt = machine.events()
if (evt & machine.PYGATE_START_EVT):
self.machine_state = config.GATEWAY_STATE_OK
pycom.rgbled(config.RGB_GATEWAY_OK)
elif (evt & machine.PYGATE_ERROR_EVT):
self.machine_state = config.GATEWAY_STATE_ERROR
pycom.rgbled(config.RGB_GATEWAY_ERROR)
elif (evt & machine.PYGATE_STOP_EVT):
self.machine_state = config.GATEWAY_STATE_STOP
pycom.rgbled(config.RGB_GATEWAY_STOP)
def __init__(self):
print("Init: Initialization of Gateway class...")
# Machine
machine.callback(
trigger=(machine.PYGATE_START_EVT | machine.PYGATE_STOP_EVT
| machine.PYGATE_ERROR_EVT),
handler=self.machine_callback)
self.machine_state = 0
# LTE
self.lte = LTE()
self.lte_connection_state = 0
# RTC
self.rtc = RTC()
# Gateway
# Read the GW config file from Filesystem
self.gateway_config_file = None
# Timers
self.rgb_breathe_timer = Timer.Chrono()
# Startup
# Should be called outside init
# self.start_up()
def lte_event_callback(self, arg):
#self.blink_rgb_led(5, 0.25, config.RGB_LTE_ERROR)
#self.lte.deinit()
#machine.reset()
print(
"\n\n\n#############################################################"
)
print("CB LTE Callback Handler")
ev = arg.events() # NB: reading the events clears them
t = time.ticks_ms()
print("CB", t, time.time(), ev, time.gmtime())
self.blink_rgb_led(3, 0.25, config.RGB_LTE_ERROR)
if ev & LTE.EVENT_COVERAGE_LOSS:
print("CB", t, "coverage loss")
if ev & LTE.EVENT_BREAK:
print("CB", t, "uart break signal")
try:
self.lte.pppsuspend()
if not self.lte.isattached():
print("not attached ... reattach")
self.lte.detach()
self.init_lte()
else:
print("attached ... resume")
self.lte.pppresume()
except Exception as ex:
sys.print_exception(ex)
print(
"#############################################################\n\n\n"
)
def init_gateway(self):
print("Init GW: Starting LoRaWAN Concentrator...")
try:
self.gateway_config_file = open(config.GW_CONFIG_FILE_PATH,
'r').read()
except Exception as e:
print("Error opening Gateway Config: {}".format(e))
# TODO: Handle Error
return False
else:
machine.pygate_init(self.gateway_config_file)
print("Init GW: LoRaWAN Concentrator UP!")
return True
def init_rtc(self):
print("Init RTC: Syncing RTC...")
try:
self.rtc.ntp_sync(server="pool.ntp.org")
while not self.rtc.synced():
self.blink_rgb_led(1,
0.25,
config.RGB_RTC_IS_SYNCING,
delay_end=False)
self.blink_rgb_led(3, 0.1, config.RGB_RTC_IS_SYNCING)
except Exception as e:
print("Exception syncing RTC: {}".format(e))
return False
else:
print("Init RTC: Synced!")
return True
def init_lte(self):
self.lte_connection_state = 0
self.lte.init()
#self.lte.lte_callback(LTE.EVENT_COVERAGE_LOSS, self.lte_event_callback)
self.lte.lte_callback(LTE.EVENT_BREAK, self.lte_event_callback)
while True:
# attach LTE
if self.lte_connection_state == 0:
print("Init LTE: Attaching LTE...")
self.lte.attach(band=config.LTE_BAND, apn=config.LTE_APN)
while not self.lte.isattached():
self.blink_rgb_led(1,
0.25,
config.RGB_LTE_IS_ATTACHING,
delay_end=False)
self.blink_rgb_led(3, 0.1, config.RGB_LTE_IS_ATTACHING)
self.lte_connection_state += 1
print("Init LTE: Attached!")
# connect LTE
if self.lte_connection_state == 1:
print("Init LTE: Connecting LTE...")
self.lte.connect()
while not self.lte.isconnected():
self.blink_rgb_led(1,
0.25,
config.RGB_LTE_IS_CONNECTING,
delay_end=False)
self.blink_rgb_led(3, 0.1, config.RGB_LTE_IS_CONNECTING)
self.lte_connection_state += 1
print("Init LTE: Connected!")
# done
if self.lte_connection_state == 2:
return True
def blink_rgb_led(self,
times,
speed,
color_on,
color_off=config.RGB_OFF,
delay_end=True):
for index in range(times):
pycom.rgbled(config.RGB_OFF)
time.sleep(speed)
pycom.rgbled(color_on)
time.sleep(speed)
pycom.rgbled(config.RGB_OFF)
if delay_end is True:
time.sleep(0.1)
def start_up(self):
print("Start Up: Now starting up Gateway...")
self.init_lte()
self.init_rtc()
self.init_gateway()
#self.main_loop()
def main_loop(self):
# Start Timers
self.rgb_breathe_timer.start()
while True:
if self.rgb_breathe_timer.read(
) > config.TIMER_RGB_BREATHE_INTERVAL:
self.rgb_breathe_timer.reset()
class NanoGateway:
"""
Nano gateway class, set up by default for use with TTN, but can be configured
for any other network supporting the Semtech Packet Forwarder.
Only required configuration is wifi_ssid and wifi_password which are used for
connecting to the Internet.
"""
def __init__(self,
id,
frequency,
datarate,
server,
port,
ntp_server='pool.ntp.org',
ntp_period=3600):
self.id = id
self.server = server
self.port = port
self.frequency = frequency
self.datarate = datarate
# self.ssid = ssid
# self.password = password
self.ntp_server = ntp_server
self.ntp_period = ntp_period
self.server_ip = None
self.rxnb = 0
self.rxok = 0
self.rxfw = 0
self.dwnb = 0
self.txnb = 0
self.sf = self._dr_to_sf(self.datarate)
self.bw = self._dr_to_bw(self.datarate)
self.stat_alarm = None
self.pull_alarm = None
self.uplink_alarm = None
self.lte = None
self.sock = None
self.udp_stop = False
self.udp_lock = _thread.allocate_lock()
self.lora = None
self.lora_sock = None
self.rtc = machine.RTC()
def start(self):
"""
Starts the LoRaWAN nano gateway.
"""
pycom.heartbeat(False)
self._log('Starting LoRaWAN nano gateway with id: {}', self.id)
# # setup WiFi as a station and connect
# self.wlan = WLAN(mode=WLAN.STA)
# self._connect_to_wifi()
# setup LTE CATM1 connection
self.lte = LTE(carrier="verizon")
self._connect_to_LTE()
# get a time sync
self._log('Syncing time with {} ...', self.ntp_server)
self.rtc.ntp_sync(self.ntp_server, update_period=self.ntp_period)
while not self.rtc.synced():
utime.sleep_ms(50)
self._log("RTC NTP sync complete")
# get the server IP and create an UDP socket
self.server_ip = usocket.getaddrinfo(self.server, self.port)[0][-1]
self._log('Opening UDP socket to {} ({}) port {}...', self.server,
self.server_ip[0], self.server_ip[1])
self.sock = usocket.socket(usocket.AF_INET, usocket.SOCK_DGRAM,
usocket.IPPROTO_UDP)
self.sock.setsockopt(usocket.SOL_SOCKET, usocket.SO_REUSEADDR, 1)
self.sock.setblocking(False)
# push the first time immediatelly
self._push_data(self._make_stat_packet())
# create the alarms
self.stat_alarm = Timer.Alarm(
handler=lambda t: self._push_data(self._make_stat_packet()),
s=60,
periodic=True)
self.pull_alarm = Timer.Alarm(handler=lambda u: self._pull_data(),
s=25,
periodic=True)
# start the UDP receive thread
self.udp_stop = False
_thread.start_new_thread(self._udp_thread, ())
# initialize the LoRa radio in LORA mode
self._log('Setting up the LoRa radio at {} Mhz using {}',
self._freq_to_float(self.frequency), self.datarate)
self.lora = LoRa(mode=LoRa.LORA,
frequency=self.frequency,
bandwidth=self.bw,
sf=self.sf,
preamble=8,
coding_rate=LoRa.CODING_4_5,
tx_iq=True)
# create a raw LoRa socket
self.lora_sock = usocket.socket(usocket.AF_LORA, usocket.SOCK_RAW)
self.lora_sock.setblocking(False)
self.lora_tx_done = False
self.lora.callback(trigger=(LoRa.RX_PACKET_EVENT
| LoRa.TX_PACKET_EVENT),
handler=self._lora_cb)
self._log('LoRaWAN nano gateway online')
def stop(self):
"""
Stops the LoRaWAN nano gateway.
"""
self._log('Stopping...')
# send the LoRa radio to sleep
self.lora.callback(trigger=None, handler=None)
self.lora.power_mode(LoRa.SLEEP)
# stop the NTP sync
self.rtc.ntp_sync(None)
# cancel all the alarms
self.stat_alarm.cancel()
self.pull_alarm.cancel()
# signal the UDP thread to stop
self.udp_stop = True
while self.udp_stop:
utime.sleep_ms(50)
# disable LTE
self.lte.disconnect()
self.lte.dettach()
def _connect_to_wifi(self):
self.wlan.connect(self.ssid, auth=(None, self.password))
while not self.wlan.isconnected():
utime.sleep_ms(50)
self._log('WiFi connected to: {}', self.ssid)
def _connect_to_LTE(self):
print("reset modem")
try:
self.lte.reset()
except:
print("Exception during reset")
print("delay 5 secs")
utime.sleep(5.0)
if self.lte.isattached():
try:
print("LTE was already attached, disconnecting...")
if self.lte.isconnected():
print("disconnect")
self.lte.disconnect()
except:
print("Exception during disconnect")
try:
if self.lte.isattached():
print("detach")
self.lte.dettach()
except:
print("Exception during dettach")
try:
print("resetting modem...")
self.lte.reset()
except:
print("Exception during reset")
print("delay 5 secs")
utime.sleep(5.0)
# enable network registration and location information, unsolicited result code
self.at('AT+CEREG=2')
# print("full functionality level")
self.at('AT+CFUN=1')
utime.sleep(1.0)
# using Hologram SIM
self.at('AT+CGDCONT=1,"IP","hologram"')
print("attempt to attach cell modem to base station...")
# lte.attach() # do not use attach with custom init for Hologram SIM
self.at("ATI")
utime.sleep(2.0)
i = 0
while self.lte.isattached() == False:
# get EPS Network Registration Status:
# +CEREG: <stat>[,[<tac>],[<ci>],[<AcT>]]
# <tac> values:
# 0 - not registered
# 1 - registered, home network
# 2 - not registered, but searching...
# 3 - registration denied
# 4 - unknown (out of E-UTRAN coverage)
# 5 - registered, roaming
r = self.at('AT+CEREG?')
try:
r0 = r[0] # +CREG: 2,<tac>
r0x = r0.split(',') # ['+CREG: 2',<tac>]
tac = int(r0x[1]) # 0..5
print("tac={}".format(tac))
except IndexError:
tac = 0
print("Index Error!!!")
# get signal strength
# +CSQ: <rssi>,<ber>
# <rssi>: 0..31, 99-unknown
r = self.at('AT+CSQ')
# extended error report
# r = at('AT+CEER')
if self.lte.isattached():
print("Modem attached (isattached() function worked)!!!")
break
if (tac == 1) or (tac == 5):
print("Modem attached!!!")
break
i = i + 5
print("not attached: {} secs".format(i))
if (tac != 0):
self.blink(BLUE, tac)
else:
self.blink(RED, 5)
utime.sleep(2)
self.at('AT+CEREG?')
print("connect: start a data session and obtain an IP address")
self.lte.connect(cid=3)
i = 0
while not self.lte.isconnected():
i = i + 1
print("not connected: {}".format(i))
self.blink(YELLOW, 1)
utime.sleep(1.0)
print("connected!!!")
pycom.rgbled(GREEN)
def _dr_to_sf(self, dr):
sf = dr[2:4]
if sf[1] not in '0123456789':
sf = sf[:1]
return int(sf)
def _dr_to_bw(self, dr):
bw = dr[-5:]
if bw == 'BW125':
return LoRa.BW_125KHZ
elif bw == 'BW250':
return LoRa.BW_250KHZ
else:
return LoRa.BW_500KHZ
def _sf_bw_to_dr(self, sf, bw):
dr = 'SF' + str(sf)
if bw == LoRa.BW_125KHZ:
return dr + 'BW125'
elif bw == LoRa.BW_250KHZ:
return dr + 'BW250'
else:
return dr + 'BW500'
def _lora_cb(self, lora):
"""
LoRa radio events callback handler.
"""
events = lora.events()
if events & LoRa.RX_PACKET_EVENT:
self.rxnb += 1
self.rxok += 1
rx_data = self.lora_sock.recv(256)
stats = lora.stats()
packet = self._make_node_packet(rx_data, self.rtc.now(),
stats.rx_timestamp, stats.sfrx,
self.bw, stats.rssi, stats.snr)
self._push_data(packet)
self._log('Received packet: {}', packet)
self.rxfw += 1
if events & LoRa.TX_PACKET_EVENT:
self.txnb += 1
lora.init(mode=LoRa.LORA,
frequency=self.frequency,
bandwidth=self.bw,
sf=self.sf,
preamble=8,
coding_rate=LoRa.CODING_4_5,
tx_iq=True)
def _freq_to_float(self, frequency):
"""
MicroPython has some inprecision when doing large float division.
To counter this, this method first does integer division until we
reach the decimal breaking point. This doesn't completely elimate
the issue in all cases, but it does help for a number of commonly
used frequencies.
"""
divider = 6
while divider > 0 and frequency % 10 == 0:
frequency = frequency // 10
divider -= 1
if divider > 0:
frequency = frequency / (10**divider)
return frequency
def _make_stat_packet(self):
now = self.rtc.now()
STAT_PK["stat"]["time"] = "%d-%02d-%02d %02d:%02d:%02d GMT" % (
now[0], now[1], now[2], now[3], now[4], now[5])
STAT_PK["stat"]["rxnb"] = self.rxnb
STAT_PK["stat"]["rxok"] = self.rxok
STAT_PK["stat"]["rxfw"] = self.rxfw
STAT_PK["stat"]["dwnb"] = self.dwnb
STAT_PK["stat"]["txnb"] = self.txnb
return ujson.dumps(STAT_PK)
def _make_node_packet(self, rx_data, rx_time, tmst, sf, bw, rssi, snr):
RX_PK["rxpk"][0]["time"] = "%d-%02d-%02dT%02d:%02d:%02d.%dZ" % (
rx_time[0], rx_time[1], rx_time[2], rx_time[3], rx_time[4],
rx_time[5], rx_time[6])
RX_PK["rxpk"][0]["tmst"] = tmst
RX_PK["rxpk"][0]["freq"] = self._freq_to_float(self.frequency)
RX_PK["rxpk"][0]["datr"] = self._sf_bw_to_dr(sf, bw)
RX_PK["rxpk"][0]["rssi"] = rssi
RX_PK["rxpk"][0]["lsnr"] = snr
RX_PK["rxpk"][0]["data"] = ubinascii.b2a_base64(rx_data)[:-1]
RX_PK["rxpk"][0]["size"] = len(rx_data)
return ujson.dumps(RX_PK)
def _push_data(self, data):
token = uos.urandom(2)
packet = bytes([PROTOCOL_VERSION]) + token + bytes(
[PUSH_DATA]) + ubinascii.unhexlify(self.id) + data
with self.udp_lock:
try:
self.sock.sendto(packet, self.server_ip)
except Exception as ex:
self._log('Failed to push uplink packet to server: {}', ex)
def _pull_data(self):
token = uos.urandom(2)
packet = bytes([PROTOCOL_VERSION]) + token + bytes(
[PULL_DATA]) + ubinascii.unhexlify(self.id)
with self.udp_lock:
try:
self.sock.sendto(packet, self.server_ip)
except Exception as ex:
self._log('Failed to pull downlink packets from server: {}',
ex)
def _ack_pull_rsp(self, token, error):
TX_ACK_PK["txpk_ack"]["error"] = error
resp = ujson.dumps(TX_ACK_PK)
packet = bytes([PROTOCOL_VERSION]) + token + bytes(
[PULL_ACK]) + ubinascii.unhexlify(self.id) + resp
with self.udp_lock:
try:
self.sock.sendto(packet, self.server_ip)
except Exception as ex:
self._log('PULL RSP ACK exception: {}', ex)
def _send_down_link(self, data, tmst, datarate, frequency):
"""
Transmits a downlink message over LoRa.
"""
self.lora.init(mode=LoRa.LORA,
frequency=frequency,
bandwidth=self._dr_to_bw(datarate),
sf=self._dr_to_sf(datarate),
preamble=8,
coding_rate=LoRa.CODING_4_5,
tx_iq=True)
while utime.ticks_cpu() < tmst:
pass
self.lora_sock.send(data)
self._log(
'Sent downlink packet scheduled on {:.3f}, at {:.3f} Mhz using {}: {}',
tmst / 1000000, self._freq_to_float(frequency), datarate, data)
def _udp_thread(self):
"""
UDP thread, reads data from the server and handles it.
"""
while not self.udp_stop:
try:
data, src = self.sock.recvfrom(1024)
_token = data[1:3]
_type = data[3]
if _type == PUSH_ACK:
self._log("Push ack")
elif _type == PULL_ACK:
self._log("Pull ack")
elif _type == PULL_RESP:
self.dwnb += 1
ack_error = TX_ERR_NONE
tx_pk = ujson.loads(data[4:])
tmst = tx_pk["txpk"]["tmst"]
t_us = tmst - utime.ticks_cpu() - 15000
if t_us < 0:
t_us += 0xFFFFFFFF
if t_us < 20000000:
self.uplink_alarm = Timer.Alarm(
handler=lambda x: self._send_down_link(
ubinascii.a2b_base64(tx_pk["txpk"]["data"]),
tx_pk["txpk"]["tmst"] - 50, tx_pk["txpk"][
"datr"],
int(tx_pk["txpk"]["freq"] * 1000) * 1000),
us=t_us)
else:
ack_error = TX_ERR_TOO_LATE
self._log('Downlink timestamp error!, t_us: {}', t_us)
self._ack_pull_rsp(_token, ack_error)
self._log("Pull rsp")
except usocket.timeout:
pass
except OSError as ex:
if ex.errno != errno.EAGAIN:
self._log('UDP recv OSError Exception: {}', ex)
except Exception as ex:
self._log('UDP recv Exception: {}', ex)
# wait before trying to receive again
utime.sleep_ms(UDP_THREAD_CYCLE_MS)
# we are to close the socket
self.sock.close()
self.udp_stop = False
self._log('UDP thread stopped')
def _log(self, message, *args):
"""
Outputs a log message to stdout.
"""
print('[{:>10.3f}] {}'.format(utime.ticks_ms() / 1000,
str(message).format(*args)))
def at(self, cmd):
print("modem command: {}".format(cmd))
r = self.lte.send_at_cmd(cmd).split('\r\n')
r = list(filter(None, r))
print("response={}".format(r))
return r
def blink(self, rgb, n):
for i in range(n):
pycom.rgbled(rgb)
utime.sleep(0.25)
pycom.rgbled(BLACK)
utime.sleep(0.1)
from network import LTE
def send_at_cmd_pretty(cmd):
response = lte.send_at_cmd(cmd).split('\r\n')
for line in response:
if (len(line) > 0):
print(line)
lte = LTE()
print("imei", lte.imei())
print("is_connected", lte.isconnected())
print("ue_coverage", lte.ue_coverage())
print("iccid", lte.iccid())
print("time", lte.time())
send_at_cmd_pretty('AT+CGMI')
# PYCOM
send_at_cmd_pretty('AT+CGMM')
# FiPy
send_at_cmd_pretty('AT+CGMR')
# UE5.0.0.0d
send_at_cmd_pretty('AT+CGSN=0')
send_at_cmd_pretty('AT+CGSN=1')
send_at_cmd_pretty('AT+CGSN=2')
send_at_cmd_pretty('AT+CGSN=3')
# +CGSN: "00"
class StartIoT:
def __init__(self, network=LTE_M):
self._network = network
self.lte = LTE()
try:
self.lte.deinit()
self.lte.reset()
except:
pass
sleep(5)
self.lte.init()
sleep(5)
self._assure_modem_fw()
def _assure_modem_fw(self):
response = self.lte.send_at_cmd('ATI1')
if response != None:
lines = response.split('\r\n')
fw_id = lines[1][0:3]
is_nb = fw_id == 'UE6'
if is_nb:
print('Modem is using NB-IoT firmware (%s/%s).' %
(lines[1], lines[2]))
else:
print('Modem in using LTE-M firmware (%s/%s).' %
(lines[1], lines[2]))
if not is_nb and self._network == NB_IOT:
print(
'You cannot connect using NB-IoT with wrong modem firmware! Please re-flash the modem with the correct firmware.'
)
raise WrongNetwork
if is_nb and self._network == LTE_M:
print(
'You cannot connect using LTE-M with wrong modem firmware! Please re-flash the modem with the correct firmware.'
)
raise WrongNetwork
else:
print('Failed to determine modem firmware. Rebooting device...')
reset() # Reboot the device
def _get_assigned_ip(self):
ip_address = None
try:
self.lte.pppsuspend()
response = self.send_at_cmd_pretty('AT+CGPADDR=1')
self.lte.pppresume()
lines = response.split('\r\n')
sections = lines[1].split('"')
ip_address = sections[1]
except:
print('Failed to retrieve assigned IP from LTE network.')
return ip_address
def send_at_cmd_pretty(self, cmd):
print('>', cmd)
response = self.lte.send_at_cmd(cmd)
if response != None:
lines = response.split('\r\n')
for line in lines:
if len(line.strip()) != 0:
print('>>', line)
else:
print('>> No response.')
return response
def connect(self):
# NB-IoT
if (self._network == NB_IOT):
self.send_at_cmd_pretty('AT+CFUN=0')
self.send_at_cmd_pretty('AT+CEMODE=0')
self.send_at_cmd_pretty('AT+CEMODE?')
self.send_at_cmd_pretty('AT!="clearscanconfig"')
self.send_at_cmd_pretty('AT!="addscanfreq band=%s dl-earfcn=%s"' %
(BAND, EARFCN))
self.send_at_cmd_pretty('AT+CGDCONT=1,"IP","%s"' % APN)
self.send_at_cmd_pretty('AT+COPS=1,2,"%s"' % COPS)
self.send_at_cmd_pretty('AT+CFUN=1')
# LTE-M (Cat M1)
else:
self.send_at_cmd_pretty('AT+CFUN=0')
self.send_at_cmd_pretty('AT!="clearscanconfig"')
self.send_at_cmd_pretty('AT!="addscanfreq band=%s dl-earfcn=%s"' %
(BAND, EARFCN))
self.send_at_cmd_pretty('AT+CGDCONT=1,"IP","%s"' % APN)
self.send_at_cmd_pretty('AT+CFUN=1')
self.send_at_cmd_pretty('AT+CSQ')
# For a range scan:
# AT!="addscanfreqrange band=20 dl-earfcn-min=3450 dl-earfcn-max=6352"
print('Attaching...')
seconds = 0
while not self.lte.isattached() and seconds < attach_timeout:
sleep(0.25)
seconds += 0.25
if self.lte.isattached():
print('Attached!')
else:
print('Failed to attach to LTE (timeout)!')
raise AttachTimeout
self.lte.connect()
print('Connecting...')
seconds = 0
while not self.lte.isconnected() and seconds < connect_timeout:
sleep(0.25)
seconds += 0.25
if self.lte.isconnected():
print('Connected!')
else:
print('Failed to connect to LTE (timeout)!')
raise ConnectTimeout
print('Retrieving assigned IP...')
ip_address = self._get_assigned_ip()
print("Device IP: {}".format(ip_address))
print(ip_address)
# Initialise the CoAP module
Coap.init(ip_address)
# Register the response handler for the requests that the module initiates as a CoAP Client
Coap.register_response_handler(self.response_callback)
# A CoAP server is needed if CoAP push is used (messages are pushed down from Managed IoT Cloud)
# self.setup_coap_server()
def setup_coap_server(self):
# Add a resource with a default value and a plain text content format
r = Coap.add_resource('',
media_type=Coap.MEDIATYPE_APP_JSON,
value='default_value')
# Configure the possible operations on the resource
r.callback(
Coap.REQUEST_GET | Coap.REQUEST_POST | Coap.REQUEST_PUT
| Coap.REQUEST_DELETE, True)
# Get the UDP socket created for the CoAP module
coap_server_socket = Coap.socket()
# Create a new poll object
p = uselect.poll()
# Register the CoAP module's socket to the poll
p.register(coap_server_socket,
uselect.POLLIN | uselect.POLLHUP | uselect.POLLERR)
# Start a new thread which will handle the sockets of "p" poll
_thread.start_new_thread(socket_thread, (p, coap_server_socket))
print('CoAP server running!')
# The callback that handles the responses generated from the requests sent to a CoAP Server
def response_callback(self, code, id_param, type_param, token, payload):
# The ID can be used to pair the requests with the responses
print('ID: {}'.format(id_param))
print('Code: {}'.format(code))
print('Type: {}'.format(type_param))
print('Token: {}'.format(token))
print('Payload: {}'.format(payload))
def disconnect(self):
if self.lte.isconnected():
self.lte.disconnect()
def dettach(self):
if self.lte.isattached():
self.lte.dettach()
def send(self, data):
if not self.lte.isconnected():
raise Exception('Not connected! Unable to send.')
id = Coap.send_request(IOTGW_IP,
Coap.REQUEST_POST,
uri_port=IOTGW_PORT,
uri_path=IOTGW_ENDPOINT,
payload=data,
include_options=True)
print('CoAP POST message ID: {}'.format(id))
def pull(self, uri_path='/'):
if not self.lte.isconnected():
raise Exception('Not connected! Unable to pull.')
id = Coap.send_request(IOTGW_IP,
Coap.REQUEST_GET,
uri_port=IOTGW_PORT,
uri_path=uri_path,
include_options=True)
Coap.read()
print('CoAP GET message ID: {}'.format(id))
from network import LTE
import time
import socket
lte = LTE()
#Vodafone UK apn=nb.inetd.gdsp
print("Attempting to attach...", end="")
lte.attach(band=20, apn="ep.inetd.gdsp")
for j in range(10):
print(".", end="")
time.sleep(1)
if lte.isattached():
print("\nAttached in attempt #" + str(j + 1))
break
lte.connect()
print("Attempting to connect..", end="")
for i in range(10):
print(".", end="")
if lte.isconnected():
print("\nConnected in attempt #" + str(i + 1))
break
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.settimeout(20)
s.connect(("3.9.21.110", 6789))
result = s.send(b'helloworld')
print("Sent bytes: " + str(result))
lte.disconnect()
lte.dettach()
#vodafone uk:
lte.attach(band=20,apn="ep.inetd.gdsp")
#comms365:
#lte.attach(band=20, apn="nb.iot.com")
for j in range(10):
print(".", end ="")
time.sleep(1)
if lte.isattached():
print("\nAttached in attempt #"+str(j+1))
break
lte.send_at_cmd('AT+CEREG?').replace('\r\n','')
#NOTE: for Vodafone UK: AT+COPS=1,2,"23415"
lte.send_at_cmd('AT+COPS=1,2,"23415"').replace('\r\n','')
#NOTE: for Comms365 on vodafone
#lte.send_at_cmd('AT+COPS=1,2,"90128"').replace('\r\n','')
if not lte.isconnected():
lte.connect()
print("Attempting to connect..", end="")
for i in range(10):
print(".", end ="")
if lte.isconnected():
print("\nConnected in attempt #"+str(i+1))
break
#packet = b'$\x1a\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x03www\x06google\x03com\x00\x00\x01\x00\x01'
packet = b'hello nbiot world'
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.settimeout(20)
s.connect(("3.9.21.110", 8088))
s.send(packet)
#lte.disconnect()
class NetworkConnector:
def __init__(self):
self.logger = logging.get_logger(__name__)
self.lte = LTE()
def _attach(self):
"""
Attaches to the 1nce network
"""
self.lte.attach()
while not self.lte.isattached():
time.sleep(0.5)
print(".", end="")
self.logger.info("Sim attached to iot.1nce.net")
def connect(self):
"""
Connects to the 1nce network
"""
self._attach()
self.lte.connect()
while not self.lte.isconnected():
time.sleep(0.5)
self.logger.info("Sim connected to iot.1nce.net")
def disconnect(self):
self.lte.disconnect()
self.logger.info("Sim disconnected from iot.1nce.net")
def _send_at_command(self, command):
"""
Sends AT command over the modem
:rtype: Response string
"""
self.lte.pppsuspend()
resp = self.lte.send_at_cmd(command)
self.lte.pppresume()
return resp
def get_reception(self):
"""
Gets the current reception to the 1nce network
:return: Number Reception to the 1nce network
"""
return self._send_at_command("AT+CSQ")
def get_ip_address(self):
""""
Gets the Device it's Local IP address
:return IP Address
"""
resp = self._send_at_command("AT+CGPADDR=1")
self.logger.info(resp)
search = re.search(r"\"([1-2]?\d?\d\.[1-2]?\d?\d\.[1-2]?\d?\d\.[1-2]?\d?\d)\"", resp)
if search:
return search.group(1)
return None
class Tracker:
def __init__(self, pytrack=None, debug=False):
if pytrack is not None:
self.pytrack = pytrack
else:
self.pytrack = Pytrack()
self.debug = debug
# Instantiate and hold state for sensors (accelerometer, lte, gps, etc)
self.accel = LIS2HH12()
self.lte = LTE()
self.gps = None
# Holds the mqtt client to send messages to
self.mqttClient = None
# If after wakeup, we are in continuous GPS logging state
self.continueGPSRead = False
# Flag for handling wakeup and logging logic differently if owner is nearby
self.checkOwnerNearby = True
self.wlan = WLAN() #TODO remove
def init(self, bInitLTE=False):
'''
Initialize local variables used within the script. Checks for network connectivity. If not able to connect after
a timeout, resets the machine in order to try and conenct again.
Initializes MQTTClient and checks if we are in a continuous GPS read state after wakeup (saved to self instance variables)
'''
# Check if network is connected. If not, attempt to connect
if bInitLTE:
self.initLTE()
else:
#TODO remove
# Check if network is connected. If not, attempt to connect
counter = 0
while not self.wlan.isconnected():
# If we surpass some counter timeout and network is still not connected, reset and attempt to connect again
if counter > 100000:
machine.reset()
machine.idle()
counter += 1
# Initialize mqttClient
self.mqttClient = self._getMqttClient(self.debug)
# Check to see if we are in continued gps read (went to sleep and want to continue reading GPS data)
if self._getNVS(ConfigGPS.NVS_SLEEP_CONTINUE_GPS_READ) is not None:
self.continueGPSRead = True
# Erase this key from NVS
pycom.nvs_erase(ConfigGPS.NVS_SLEEP_CONTINUE_GPS_READ)
@staticmethod
def _getRTC():
'''
Syncs the real time clock with latest time and returns RTC instance
'''
rtc = machine.RTC()
if not rtc.synced():
# Sync real time clock
rtc.ntp_sync("pool.ntp.org")
return rtc
@staticmethod
def _getNVS(key):
'''
Looks up at the non volatile storage for a specified key. If it exists, returns the value stored
for that key. Otherwise, returns None
'''
try:
if pycom.nvs_get(key) is not None:
return pycom.nvs_get(key)
except Exception:
# Do nothing, key doesnt exist
pass
return None
@staticmethod
def _decodeBytes(data):
'''
Attempts to decode a byte array to string format. If not a byte type,
just returns the original data
'''
try:
return data.decode()
except (UnicodeDecodeError, AttributeError):
pass
return data
def _getMqttClient(self, debug):
# Initialize mqttClient
state = False
count = 0
mqttClient = None
while not state and count < 5:
try:
count += 1
mqttClient = MQTTClient(ConfigMqtt.CLIENT_ID,
ConfigMqtt.SERVER,
port=ConfigMqtt.PORT,
user=ConfigMqtt.USER,
password=ConfigMqtt.PASSWORD)
# Set the callback method that will be invoked on subscription to topics
mqttClient.set_callback(self.mqttCallback)
mqttClient.connect()
state = True
except Exception as e:
if debug:
print("Exception on initialize mqtt client: {}".format(e))
time.sleep(0.5)
#Subscribe to the disable tracking topic
mqttClient.subscribe(topic=ConfigMqtt.TOPIC_TRACKING_STATE)
time.sleep(0.5)
if self.debug:
print("Checking MQTT messages")
mqttClient.check_msg()
if self.debug:
print("Messages checked. Returning MQTT client")
return mqttClient
def initLTE(self):
#TODO remove
return
'''
If already used, the lte device will have an active connection.
If not, need to set up a new connection.
'''
lte = self.lte
debug = self.debug
if lte.isconnected():
return
# Modem does not connect successfully without first being reset.
if debug:
print("Resetting LTE modem ... ", end='')
lte.send_at_cmd('AT^RESET')
if debug:
print("OK")
time.sleep(5)
lte.send_at_cmd('AT+CFUN=0')
time.sleep(5)
#send_at_cmd_pretty('AT!="fsm"')
# While the configuration of the CGDCONT register survives resets,
# the other configurations don't. So just set them all up every time.
if debug:
print("Configuring LTE ", end='')
lte.send_at_cmd('AT!="clearscanconfig"')
if debug:
print(".", end='')
lte.send_at_cmd('AT!="RRC::addScanBand band=26"')
if debug:
print(".", end='')
lte.send_at_cmd('AT!="RRC::addScanBand band=18"')
if debug:
print(".", end='')
lte.send_at_cmd('AT+CGDCONT=1,"IP","soracom.io"')
if debug:
print(".", end='')
lte.send_at_cmd('AT+CGAUTH=1,1,"sora","sora"')
print(".", end='')
if debug:
lte.send_at_cmd('AT+CFUN=1')
print(" OK")
# If correctly configured for carrier network, attach() should succeed.
if not lte.isattached():
if debug:
print("Attaching to LTE network ", end='')
lte.attach()
while True:
if lte.isattached():
#send_at_cmd_pretty('AT+COPS?')
time.sleep(5)
break
if debug:
print('.', end='')
pycom.rgbled(0x0f0000)
time.sleep(0.5)
if debug:
pycom.rgbled(0x000000)
time.sleep(1.5)
# Once attached, connect() should succeed.
if not lte.isconnected():
if debug:
print("Connecting on LTE network ", end='')
lte.connect()
while True:
if lte.isconnected():
break
if debug:
print('.', end='')
time.sleep(1)
# Once connect() succeeds, any call requiring Internet access will
# use the active LTE connection.
self.lte = lte
def isContinueGPSRead(self):
'''
Returns true or false - whether or not we are in a continued gps read state after power cycle / deep sleep.
If true, we should jump right to gps read. False if we should execute normal wakeup flow
'''
return self.continueGPSRead
def getWakeReason(self):
'''
Returns the reason why the device was woken up.
Return values are from the ConfigWakeup scope
'''
if self.continueGPSRead:
return ConfigWakeup.WAKE_CONTINUE_GPS
elif self.pytrack.get_wake_reason() == WAKE_REASON_ACCELEROMETER:
return ConfigWakeup.WAKE_REASON_ACCELEROMATER
else:
return ConfigWakeup.WAKE_REASON_TIMEOUT
def setCheckOwnerNearby(self, bOwnerNearby=True):
'''
If bOnwerNearby is set to true (defaults to true here and constructor instantiation), we handle
logic for wakup and actively logging location and pushing mqtt messages differently.
If checkowner flag is true and owner is detected nearby on device wakeup, we are much less active
in wakeups and monitoring
'''
self.checkOwnerNearby = bOwnerNearby
def isOwnerNearby(self):
'''
Logic here checks if a known BLE device is broadcasting nearby.
If they are, return true. Else, return false
'''
# TODO remove
return False
bt = Bluetooth()
bt.start_scan(ConfigBluetooth.SCAN_ALLOW_TIME) # Scans for 10 seconds
while bt.isscanning():
adv = bt.get_adv()
if adv and binascii.hexlify(adv.mac) == ConfigBluetooth.MAC_ADDR:
try:
if self.debug:
print("Owner device found: {} Mac addr {}".format(
bt.resolve_adv_data(adv.data,
Bluetooth.ADV_NAME_CMPL),
ConfigBluetooth.MAC_ADDR))
conn = bt.connect(adv.mac)
time.sleep(0.05)
conn.disconnect()
bt.stop_scan()
except Exception:
bt.stop_scan()
return True
time.sleep(0.050)
return False
def handleOwnerNearby(self):
'''
If owner is determined to be nearby, puts device in deep sleep for specified amount
of time without acceleration wakeup
'''
# Current time and last time we wokeup with owner nearby was less than 2 minutes apart.
# Go to deep sleep for specified amount of time without accelerometer wakeup
self.pytrack.setup_sleep(ConfigWakeup.SLEEP_TIME_OWNER_NEARBY)
self.pytrack.go_to_sleep()
def mqttCallback(self, topic, msg):
'''
Method to handle callbacks of any mqtt topics that we subscribe to.
For now, only subscribes to bypass topic which is used to disable gps monitoring and accelerometer wakeup detection.
topic - MQTT topic that we are subscribing to and processing the request for
msg - Message received from the topic
'''
if self.debug:
print("In MQTT subscription callback")
# Attempt to decode the topic and msg if in byte format
topic = self._decodeBytes(topic)
msg = self._decodeBytes(msg)
# Handle mqtt topic for disabiling the monitoring
if topic == ConfigMqtt.TOPIC_TRACKING_STATE:
try:
bSleep = False
sleepTime = ConfigMqtt.SLEEP_TIME_MQTT_DISABLE
# First check if this is a plaintext msg (not json format)
if msg == ConfigMqtt.ENABLE_TRACKING_MSG:
# Tracking is enabled, continue
bSleep = False
elif msg == ConfigMqtt.DISABLE_TRACKING_MSG:
# If tracking is disabled, go to sleep with configured sleep time
bSleep = True
else:
# Structure of the message will be in json format:
# { msg: "XXX", "time": 123} where msg value is ON/OFF for disable (OFF) or enable(ON)
# and time value is time to disable tracking (will automatically be re-enabled after
# time surpasses if this value is present)
jMsg = ujson.loads(msg)
# Check if the msg is Y. If so, need to stop tracking
if jMsg['msg'] == ConfigMqtt.DISABLE_TRACKING_MSG:
# Requested to go to sleep, so set the flags
bSleep = True
# If theres a time with the disable flag, go to sleep for that amount of time
if jMsg['time'] and jMsg['time'] is not None:
sleepTime = jMsg['time']
# If the flag was set, go to sleep
if bSleep:
if self.debug:
print("Disable tracking from mqtt. Sleeping for {}".
format(sleepTime))
self.goToSleep(sleepTime=sleepTime)
except ValueError:
if self.debug:
print('Exception parsing disable tracking mqtt msg')
def sendMQTTMessage(self, topic, msg, retain=False):
'''
Sends an MQTT message to the specified topic
topic - Topic to send to
msg - Message to send to topic
mqttClient - MQTT Client used to send the message. If not defined, sends to default configured mqtt client in configuration
'''
debug = self.debug
# If LTE is not setup, initialize it so we can send messages
#self.initLTE()
if self.mqttClient is None:
try:
# Instantiate a new MQTTClient
self.mqttClient = self._getMqttClient(debug)
except:
self.mqttClient = None
try:
if self.mqttClient is not None:
# Send the message topic
self.mqttClient.publish(topic=topic, msg=msg, retain=retain)
except:
if debug:
print(
"Exception occurred attempting to connect to MQTT server")
def goToSleep(self, sleepTime=60, bWithInterrupt=False, bSleepGps=True):
'''
Puts the py to deepsleep, turning off lte in order to reduce battery consumption.
By default, sleeps for 60 seconds and powers down gps.
sleepTime - specifies the time (in seconds) to put the device in deep sleep before waking up
bWithInterrupt - if True, will wakeup for both timer timeout as well as acceleration interrupt
bSleepGps - If True, puts the gps in deepsleep state as well (will take longer to reinitialize and refix gps signal)
'''
# Enable wakeup source from INT pin
self.pytrack.setup_int_pin_wake_up(False)
# Enable activity and inactivity interrupts with acceleration threshold and min duration
if bWithInterrupt:
self.pytrack.setup_int_wake_up(True, True)
self.accel.enable_activity_interrupt(
ConfigAccelerometer.INTERRUPT_THRESHOLD,
ConfigAccelerometer.INTERRUPT_DURATION)
# If mqttClient is defined, disconnect
if self.mqttClient is not None:
try:
self.mqttClient.disconnect()
except:
if self.debug:
print("Exception occurred disconnecting from mqtt client")
# Disconnect lte
if self.lte is not None and self.lte.isconnected():
try:
self.lte.disconnect()
time.sleep(1)
self.lte.dettach()
except:
if self.debug:
print("Exception disconnecting from lte")
# Go to sleep for specified amount of time if no accelerometer wakeup
if self.debug:
print("Sleeping for {} seconds with accel interrupt? {}".format(
sleepTime, bWithInterrupt))
time.sleep(0.5)
time.sleep(0.1)
self.pytrack.setup_sleep(sleepTime)
self.pytrack.go_to_sleep(gps=bSleepGps)
def _getGpsFix(self):
'''
Attempts to lock on a signal to the gps.
Returns true if signal is found, false otherwise
'''
# Attempt to get the gps lock for X number of attempts (defined in config)
maxTries = max(ConfigGPS.LOCK_FAIL_ATTEMPTS, 1)
signalFixTries = maxTries
while signalFixTries > 0:
signalFixTries -= 1
if self.debug:
print("On GPS fix try number {} of {}".format(
maxTries - signalFixTries, maxTries))
self.gps.get_fix(debug=False)
pycom.heartbeat(False)
bIsFixed = False
if self.gps.fixed():
# Got the GPS fix, exit out of this while condition
if self.debug:
pycom.rgbled(0x000f00)
bIsFixed = True
else:
# If couldnt get a signal fix, try again
if self.debug:
pycom.rgbled(0x0f0000)
return bIsFixed
def monitorLocation(self, bWithMotion=True):
'''
Sends GPS location to Mqtt topic. Continues sending data as long as motion is detected
bWithMotion - If true, continues to monitor and send GPS location to topic as long as accelerometer activity is
detected. If false, only publishes location once
'''
if self.debug:
print("Monitoring Location")
self.gps = L76GNSS(self.pytrack,
timeout=ConfigGPS.LOCK_TIMEOUT,
debug=False)
self.gps.setAlwaysOn()
if not self._getGpsFix():
# Couldnt get a signal so send message to topic for gps not available and exit (go back to sleep)
if self.debug:
print("Couldnt get a GPS signal after {} attempts".format(
ConfigGPS.LOCK_FAIL_ATTEMPTS))
self.sendMQTTMessage(ConfigMqtt.TOPIC_GPS_NOT_AVAILABLE, "-1")
return
# Otherwise we have a gps signal, so get the coordinates and send to topic
coordinates = self.gps.coordinates()
self.sendMQTTMessage(ConfigMqtt.TOPIC_GPS, coordinates)
# Save current timestamp of log time
self._getRTC() # Syncs rtc
pycom.nvs_set(ConfigGPS.NVS_LAST_LOCATION_LOG_TIME, utime.time())
# If we want to monitor with motion (send multiple gps coordinates as long as there is motion), start monitoring
if bWithMotion & self.accelInMotion():
# Go to sleep for a specified amount of time (keeping GPS alive) to conserve some battery
# TODO - check if this is better than setPeriodicMode
if self.debug:
print("Putting gps in low power and going to sleep")
#Save state to nvs (non volatile storage)
pycom.nvs_set(ConfigGPS.NVS_SLEEP_CONTINUE_GPS_READ, 1)
self.goToSleep(sleepTime=ConfigGPS.SLEEP_BETWEEN_READS,
bWithInterrupt=False,
bSleepGps=False)
def accelInMotion(self, numReads=10):
'''
Takes numReads measurements of accelerometer data to detect if there is motion.
numReads - Number of measurements to take to detect motion
Returns true if delta sensor data is above a threshold (meaning there is active motion), false otherwise
'''
accel = self.accel
xyzList = list()
xyzList.append(accel.acceleration())
for index in range(0, numReads):
# Print change from last reading
time.sleep(0.5)
xyzList.append(accel.acceleration())
deltas = list(
map(lambda b, a: abs(b - a), xyzList[-1], xyzList[-2])
) # Get last element (with -1) and subtract previous element (-2)
# If max delta is greater than threshold, return true
if max(deltas) >= ConfigAccelerometer.MOTION_CHECK_MIN_THRESHOLD:
return True
# Get the largest change in x, y, and z and see if that surpasses the threshold
minVals = list()
maxVals = list()
for i in range(3):
minVals.append(min(map(lambda a, i=i: a[i], xyzList)))
maxVals.append(max(map(lambda a, i=i: a[i], xyzList)))
# Get the maximum delta for x, y, z for all logged points
deltas = list(map(lambda b, a: b - a, maxVals, minVals))
if self.debug:
print("Deltas accel motion {}".format(deltas))
# If any x, y, or z axis in deltas array have a total delta change past the allowed threshold, return true. Otherwise return false
return max(deltas) >= ConfigAccelerometer.MOTION_CHECK_MIN_THRESHOLD
def logRegularCoordinates(self):
'''
On regular timed wakeups, we still log our location every so often. Check the last time the location was
logged and if the time is greater than the surpassed time defined in config, log coordinates again
'''
lastLogTime = self._getNVS(ConfigGPS.NVS_LAST_LOCATION_LOG_TIME)
self._getRTC() # Updates RTC
# Compare the last log time with current rtc to see if threshold has passed
if (lastLogTime is None or
(utime.time() - lastLogTime > ConfigGPS.LOCATION_LOG_INTERVAL)):
# Need to update gps as time has elapsed since last log
self.monitorLocation(bWithMotion=False) # Only log once
def accelWakeup(self):
'''
Logic to handle board wakeup interruption due to accelerometer.
Sends mqtt messages for wakeup if client is defined.
'''
debug = self.debug
if debug:
print("Accelerometer wakeup")
# Check if the owner is nearby (owner moving device). If so, handle differently
if self.checkOwnerNearby and self.isOwnerNearby():
# Owner is nearby. If last wake is with 2 minutes, we are most likely riding
# so go to sleep for longer time without wakeup
self.handleOwnerNearby()
# Check the accelerometer is still active (preventing false negatives for alerting of theft)
# If we dont ready any new accelerometer motion, exit this function and dont send any accelerometer wakeup or gps msgs
if not self.accelInMotion():
if debug:
print("Not currently in motion, going back to sleep")
return
else:
if debug:
print("Motion detected after wakeup...")
# Not a false wakeup, so send a message to the initial accelerometer wakeup topic
self.sendMQTTMessage(ConfigMqtt.TOPIC_ACCEL_WAKEUP, "1")
# Send GPS updates while there has been continued motion for some time
self.monitorLocation(bWithMotion=True)