def connect_to_network():
"""
Connects to Wi-Fi Network
Warning: we used firmware MicroPython 1.18.2.r7 [v1.8.6-849-df9f237], newer FW versions have an
issue with the Wi-Fi driver as of 29/02/2020 (Scans OK but cannot connect)
:return: True if we could connect to the Wi-Fi or otherwise False.
"""
wlan = WLAN(mode=WLAN.STA)
# Scanning for networks
nets = wlan.scan()
for net in nets:
print(net.ssid)
if net.ssid == _WIFI_SSID:
print("Found the network")
wlan.connect(net.ssid, auth=(net.sec, _WIFI_PASS), timeout=5000)
while not wlan.isconnected():
machine.idle()
print("WLAN connection to", _WIFI_SSID, "succeeded!")
break
# The assigned IP address for the Pycom
print("IP-address:", wlan.ifconfig()[0])
return wlan.isconnected()
def get_WLAN():
global wlan
if wlan == None:
wlan = WLAN(mode=WLAN.STA)
if wlan.isconnected():
return True
nets = wlan.scan()
for net in nets:
if net.ssid == config.WLAN_SSID:
debugprint('Network found!')
wlan.connect(net.ssid,
auth=(net.sec, config.WLAN_WPA),
timeout=5000)
attempts = 0
while (not wlan.isconnected()) and (attempts < 10):
debugprint('Connecting...')
attempts = attempts + 1
time.sleep(1)
if wlan.isconnected():
debugprint('WLAN connection succeeded')
return True
else:
debugprint('WLAN connection failed')
end_WLAN()
return False
debugprint('No known WLAN SSID found')
wlan.deinit()
wlan = None
return False
def __smart_config_setup(self):
wl = WLAN(mode=WLAN.STA)
wl.callback(trigger=WLAN.SMART_CONF_DONE | WLAN.SMART_CONF_TIMEOUT,
handler=self.__smart_config_callback)
if pycom.wifi_ssid_sta() is not None and len(
pycom.wifi_ssid_sta()) > 0:
print('Trying previous AP details for 60 seconds...')
pycom.wifi_on_boot(True, True)
try:
start_time = time.time()
while not wl.isconnected() and (
time.time() - start_time <
60) and self.__smart_config:
time.sleep(1)
except:
pass
if wl.isconnected() and self.__smart_config:
try:
from pybytes_config import PybytesConfig
except:
from _pybytes_config import PybytesConfig
self.__conf = PybytesConfig().smart_config()
self.__smart_config = False
self.start()
if self.__smart_config:
wl.smartConfig()
print("Smart Provisioning started in the background")
print("See https://docs.pycom.io/smart for details")
def connect_to_wifi(wifi_ssid, wifi_passwd):
wlan = WLAN(mode=WLAN.STA)
for ltry in range(3):
print("Connecting to: " + wifi_ssid + ". Try " + str(ltry))
nets = wlan.scan()
for net in nets:
if net.ssid == wifi_ssid:
print('Network ' + wifi_ssid + ' found!')
wlan.connect(net.ssid,
auth=(net.sec, wifi_passwd),
timeout=5000)
while not wlan.isconnected():
machine.idle() # save power while waiting
break
if wlan.isconnected():
break
else:
print('Cannot find network ' + wifi_ssid)
flash_led_to(RED, 1)
if not wlan.isconnected():
print('Cannot connect to network ' + wifi_ssid + '. Quitting!!!')
sys.exit(1)
else:
print('WLAN connection succeeded!')
flash_led_to(GREEN, 1)
print(wlan.ifconfig())
class WiFi(object):
wlan = None
config = None
def can_see_ssid(self, ssid):
networks = [w[0] for w in self.wlan.scan()]
return ssid in networks
def __init__(self, config):
self.config = config
self.wlan = WLAN(mode=WLAN.STA)
def isconnected():
return self.wlan.isconnected()
def connect_wifi(self):
config = self.config
if not self.wlan.isconnected():
for wlan in config['WLANS']:
if self.can_see_ssid(wlan['WLAN_SSID']):
print("Trying: {} ...".format(wlan['WLAN_SSID']))
self.wlan.connect(ssid=wlan['WLAN_SSID'],
auth=(WLAN.WPA2, wlan['WLAN_KEY']))
# Give it a chance to get connected
count = 0
while not self.wlan.isconnected() and count < 10:
print("Waiting for connection... ({})".format(count))
count += 1
sleep(1)
if not self.wlan.isconnected():
print("Giving up")
if self.wlan.isconnected():
print("Connected: \n", self.wlan.ifconfig())
def connect_to_wifi_UPVIoT(wifi_user, wifi_passwd):
wifi_ssid="UPV-IoT"
wlan = WLAN(mode=WLAN.STA)
if (wifi_user=="IOTPMxxx"):
print("No te has leido el boletín de practicas... verdad?!?!?")
sys.exit()
for ltry in range(3):
print("Connecting to: "+wifi_ssid+" as "+wifi_user+". Try "+str(ltry))
nets = wlan.scan()
for net in nets:
if net.ssid == wifi_ssid:
print('Network '+wifi_ssid+' found!')
wlan.connect(net.ssid, auth=(WLAN.WPA2_ENT, wifi_user, wifi_passwd), identity=wifi_user)
while not wlan.isconnected():
machine.idle() # save power while waiting
break
if wlan.isconnected():
break
else:
print('Cannot find network '+wifi_ssid)
flash_led_to(RED, 1)
if not wlan.isconnected():
print('Cannot connect to network '+wifi_ssid+'. Quitting!!!')
sys.exit(1)
else:
print('WLAN connection succeeded!')
flash_led_to(GREEN, 1)
print (wlan.ifconfig())
def exp_start():
global stats
global detailed_stats
global run_stats
wlan = WLAN(mode=WLAN.STA)
print(ubinascii.hexlify(wlan.mac(), ':').decode())
if not wlan.isconnected():
wlan.connect(ssid='rasp', auth=(WLAN.WPA2, 'lalalala'), timeout=5000)
while not wlan.isconnected():
machine.idle()
print("I got IP" + wlan.ifconfig()[0])
host = wlan.ifconfig()[0]
port = 8000
wlan_s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
print("socket created")
wlan_s.bind((host, port))
wlan_s.listen(5)
print("Waiting for initialization...")
_thread.start_new_thread(receive_stats, ())
while (True):
conn, addr = wlan_s.accept()
print('Got connection from', addr)
data = conn.recv(512)
data = str(data)[2:][:-1]
if (len(data) > 10):
try:
(init, ip, pkts) = data.split(":")
if (init == "init"):
pycom.rgbled(red)
msg = ip + ":" + pkts
run_stats = 0
time.sleep(1)
lora.init(mode=LoRa.LORA,
tx_iq=True,
region=LoRa.EU868,
frequency=freqs[0],
power_mode=LoRa.TX_ONLY,
bandwidth=LoRa.BW_125KHZ,
sf=12)
pkg = struct.pack(_LORA_PKG_FORMAT % len(msg), MY_ID,
len(msg), msg)
# lora_sock.send(pkg)
for j in range(3):
lora_sock.send(pkg)
time.sleep(1)
lora.init(mode=LoRa.LORA,
rx_iq=True,
region=LoRa.EU868,
frequency=freqs[7],
power_mode=LoRa.ALWAYS_ON,
bandwidth=LoRa.BW_125KHZ,
sf=12)
pycom.rgbled(green)
run_stats = 1
stats = []
detailed_stats = []
_thread.start_new_thread(receive_stats, ())
except:
print("wrong packet format!")
def connect():
wlan = WLAN()
if not wlan.isconnected():
wlan.connect(_SSID, auth=(WLAN.WPA2, 'phobiccoconut688'), timeout=5000)
while not wlan.isconnected():
machine.idle()
logging('WLAN connection succeeded!')
logging("My IP address is: {0}".format(wlan.ifconfig()[0]))
def do_connect():
sta_if = WLAN(STA_IF)
if not sta_if.isconnected():
print('connecting to network...')
sta_if.active(True)
sta_if.connect(essid, password)
while not sta_if.isconnected():
pass
print('network config:', sta_if.ifconfig())
def do_connect(SSID='LANTERN', PASS='******'):
sta_if = WLAN(mode=WLAN.STA)
if not sta_if.isconnected():
print('connecting to network...')
sta_if.active(True)
sta_if.connect(SSID, PASS)
while not sta_if.isconnected():
pass
print('network config:', sta_if.ifconfig())
def connect_network():
sta_if = WLAN(STA_IF)
if not sta_if.isconnected():
print('connecting to network...')
sta_if.active(True)
sta_if.connect(SSID, WPA_PASSWORD)
while not sta_if.isconnected():
pass
print('connected to network', sta_if.ifconfig())
def do_connect():
from network import WLAN
sta_if = WLAN(network.STA_IF)
if not sta_if.isconnected():
print('connecting to network...')
sta_if.active(True)
sta_if.connect(WIFISSID, WIFIPASS)
while not sta_if.isconnected():
pass
print('network config:', sta_if.ifconfig())
def do_connect():
from network import WLAN
sta_if = WLAN(network.STA_IF)
if not sta_if.isconnected():
print('connecting to network...')
sta_if.active(True)
sta_if.connect(config.WIFISSID, config.WIFIPASS)
while not sta_if.isconnected():
pass
print('network config:', sta_if.ifconfig())
def connect_to_ap():
station = WLAN(STA_IF)
if not station.active():
station.active(True)
if not station.isconnected():
LOGGER.debug('Connecting....')
station.connect(SSID, PASSWORD)
while not station.isconnected():
sleep(1)
LOGGER.debug('Connected {}'.format(station.ifconfig()))
def wlan_connect():
global oled
wlan = WLAN(STA_IF) # create station interface
wlan.active(True) # bring interface up
if not wlan.isconnected():
oled.text('Connecting to network...', 0, 0)
wlan.connect('SCOTTCAMPUS', 'mavericks')
oled.text(wlan.config('essid'), 20, 35)
oled.show()
while not wlan.isconnected():
pass
print('Network config:', wlan.ifconfig())
def wifi_connect():
led.off()
wlan = WLAN(STA_IF)
if not wlan.isconnected():
wlan.active(True)
wlan.connect(ssid, ssidpassword)
while not wlan.isconnected():
idle()
pass
# print('Network secrets:', sta_if.ifconfig())
led.on()
def connect_to_ap():
station = WLAN(mode=WLAN.STA)
# if not station.active():
# station.active(True)
if not station.isconnected():
print('Connecting....')
station.connect(config.SSID, auth=(WLAN.WPA2, config.PASSWORD), timeout=5000)
while not station.isconnected():
time.sleep(1)
print('.', end='')
print("connected")
print(station.ifconfig())
def set_wifi(essid, pwd, timeout=60):
console_write('[NW: STA] SET WIFI: {}'.format(essid))
essid_found = False
# Disable AP mode
ap_if = WLAN(AP_IF)
if ap_if.active():
ap_if.active(False)
del ap_if
# Set STA and Connect
sta_if = WLAN(STA_IF)
sta_if.active(True)
if not sta_if.isconnected():
console_write('\t| [NW: STA] CONNECT TO NETWORK {}'.format(essid))
# Scan wifi network - retry workaround
for _ in range(0, 2):
if essid in (wifispot[0].decode('utf-8')
for wifispot in sta_if.scan()):
essid_found = True
console_write(
'\t| - [NW: STA] ESSID WAS FOUND {}'.format(essid_found))
break
sleep(1)
# Connect to the located wifi network
if essid_found:
# connect to network
sta_if.connect(essid, pwd)
# wait for connection, with timeout set
while not sta_if.isconnected() and timeout > 0:
console_write("\t| [NW: STA] Waiting for connection... " +
str(timeout) + "/60")
timeout -= 1
sleep(0.5)
# Set static IP - here because some data comes from connection.
if sta_if.isconnected() and __set_wifi_dev_static_ip(sta_if):
sta_if.disconnect()
del sta_if
return set_wifi(essid, pwd)
else:
console_write(
"\t| [NW: STA] Wifi network was NOT found: {}".format(essid))
return False
console_write("\t|\t| [NW: STA] network config: " +
str(sta_if.ifconfig()))
console_write("\t|\t| [NW: STA] CONNECTED: " +
str(sta_if.isconnected()))
else:
console_write("\t| [NW: STA] ALREADY CONNECTED TO {}".format(essid))
cfgput("devip", str(sta_if.ifconfig()[0]))
set_uid_macaddr_hex(sta_if)
return sta_if.isconnected()
def wlan_connect(wlan_essid, wlan_password, hostname: str = ""):
from network import WLAN, STA_IF
from utime import sleep
nic = WLAN(STA_IF)
if not nic.isconnected():
print("Connecting to network: ...")
nic.active(True)
if len(hostname) > 0:
nic.config(dhcp_hostname=hostname)
nic.connect(wlan_essid, wlan_password)
while not nic.isconnected():
sleep(1)
print("Network connected, the configuration: {}".format(nic.ifconfig()))
def connect_to_wifi(self, config):
wlan = WLAN(0)
wlan.active(True)
time.sleep(1.0)
if not wlan.isconnected():
logger.log('connecting to network...')
wlan.connect(config['SSID'], config['PASSWORD'])
while not wlan.isconnected():
time.sleep(1.0)
pass
logger.log(wlan.ifconfig())
time.sleep(1.0)
def __cli_activation_over_wifi(self, activation_info):
print('Please wait while we try to connect to {}'.format(
activation_info.get('s')))
from network import WLAN
wlan = WLAN(mode=WLAN.STA)
attempt = 0
known_nets = [((activation_info['s'], activation_info['p']))] # noqa
print_debug(3, 'WLAN connected? {}'.format(wlan.isconnected()))
while not wlan.isconnected() and attempt < 10:
attempt += 1
print_debug(3, "Wifi connection attempt: {}".format(attempt))
print_debug(3, 'WLAN connected? {}'.format(wlan.isconnected()))
available_nets = None
while available_nets is None:
try:
available_nets = wlan.scan()
for x in available_nets:
print_debug(5, x)
time.sleep(3)
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:
wlan.connect(net_to_use, timeout=10000)
else:
wlan.connect(net_to_use, (sec, pwd), timeout=10000)
start_time = time.time()
while not 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!")
wlan.deinit()
return None
elif attempt == 3:
print("Error connecting using WIFI: %s" % e)
return None
class ConnectWIFI:
def __init__(self):
self.wlan = WLAN(mode=WLAN.STA)
def connectwifi(self):
if self.isConnected():
print("Wifi Connected")
else:
self.SSID = config.wifissid
self.PASSWORD = config.wifipassword
timeout = time.time() + 10
self.wlan.connect(self.SSID,
auth=(WLAN.WPA, self.PASSWORD),
channel=9)
while not self.wlan.isconnected():
if time.time() > timeout:
pycom.rgbled(config.LED_ERROR)
time.sleep(0.5)
pycom.rgbled(config.LED_ERROR)
machine.reset()
print(".", end="")
pycom.rgbled(config.LED_blink_WIFI)
time.sleep(0.5)
pycom.rgbled(0x000000)
time.sleep(0.5)
machine.idle() # save power while waiting
print('.........WiFi connected........')
print("Wifi Config --> ", self.wlan.ifconfig())
def isConnected(self):
if self.wlan.isconnected():
return True
else:
return False
def deinit(self):
print('Deinitializing wifi radio')
self.wlan.deinit()
def disconnect(self):
print("disconnecting wifi")
self.wlan.disconnect()
def reconnect(self):
if self.isConnected():
print("wifi connected")
else:
print("Trying to reconnect")
self.__init__()
self.connectwifi()
def set_wifi(essid, pwd, timeout=60):
console_write('[NW: STA] SET WIFI STA NW {}'.format(essid))
# Disable AP mode
ap_if = WLAN(AP_IF)
if ap_if.active():
ap_if.active(False)
del ap_if
# Set STA and Connect
sta_if = WLAN(STA_IF)
sta_if.active(True)
# Set custom DHCP hostname
sta_if.config(dhcp_hostname=cfgget('devfid'))
# Check are we already connected
if not sta_if.isconnected():
# Multiple essid and pwd handling with retry mechanism
essid, pwd = __select_available_wifi_nw(sta_if, essid, pwd)
# Connect to the located wifi network
if essid is not None:
console_write('\t| [NW: STA] CONNECT TO NETWORK {}'.format(essid))
# connect to network
sta_if.connect(essid, pwd)
# wait for connection, with timeout set
while not sta_if.isconnected() and timeout > 0:
console_write(
"\t| [NW: STA] Waiting for connection... {} sec".format(
timeout))
timeout -= 1
sleep_ms(500)
# Set static IP - here because some data comes from connection. (subnet, etc.)
if sta_if.isconnected() and __set_wifi_dev_static_ip(sta_if):
sta_if.disconnect()
del sta_if
return set_wifi(essid, pwd)
else:
console_write(
"\t| [NW: STA] Wifi network was NOT found: {}".format(essid))
return False
console_write("\t|\t| [NW: STA] network config: " +
str(sta_if.ifconfig()))
console_write("\t|\t| [NW: STA] CONNECTED: " +
str(sta_if.isconnected()))
else:
console_write("\t| [NW: STA] ALREADY CONNECTED TO {}".format(essid))
cfgput("devip", str(sta_if.ifconfig()[0]))
set_dev_uid()
return sta_if.isconnected()
def connect_WiFi(ssid='NachoWifi', password='******'):
wlan = WLAN(STA_IF)
wlan.active(True)
if not wlan.isconnected():
print('connecting to network...')
wlan.connect(ssid, password)
while not wlan.isconnected():
pass
print('network config:', wlan.ifconfig())
mac = hexlify(WLAN().config('mac'), ':').decode()
print('Oh Yes! Get Connected')
print('Connected to NachoWifi')
print('MAC Address: ', mac)
print('IP Address: ', wlan.ifconfig()[0])
return wlan
def connect_wifi_sdk(ssid, pw):
from network import WLAN
from network import STA_IF
import machine
wlan = WLAN(STA_IF)
nets = wlan.scan()
if (wlan.isconnected()):
wlan.disconnect()
wlan.connect(ssid, pw)
while not wlan.isconnected():
machine.idle() # save power while waiting
print('WLAN connection succeeded!')
break
print("connected:", wlan.ifconfig())
class PyWiFi(object):
def __init__(self, mode, ssid=None, password=None, hidden=False):
self._ssid = ssid
self._hidden = hidden
if mode == WLAN.STA_AP or mode == WLAN.AP:
self._wlan = WLAN(mode=mode,
ssid=ssid,
auth=(WLAN.WPA2, password),
hidden=hidden)
else:
self._wlan = WLAN(mode=mode)
def connect(self, ssid, password, timeout=5000):
pycom.heartbeat(False)
networks = self._wlan.scan()
for network in networks:
if network.ssid == ssid:
print("[" + ssid + "]: connecting...")
pycom.rgbled(0x110000)
self._wlan.connect(network.ssid,
auth=(network.sec, password),
timeout=timeout)
while not self._wlan.isconnected():
sleep(0.5)
print("[" + ssid + "]: connected")
pycom.rgbled(0x001100)
break
def printWLAN(self):
print(self._wlan.ifconfig())
def connect_sta(self,time_out = 120):
config_dict = self.__get_board_config_js()
sta_ssid = config_dict.get("sta_ssid","")
if len(sta_ssid) <= 0:
raise Exception("sta ssid not configed")
sta_pwd = config_dict.get("sta_pwd","")
if len(sta_pwd) <= 0:
raise Exception("sta passworld not configed")
sta_auth_type = config_dict.get("sta_auth_type","WPA2")
if sta_auth_type == 'WEP':
auth_type = 1
elif sta_auth_type == 'WPA':
auth_type = 2
else:
auth_type = 3
wlan=WLAN()
wlan.mode(3)
wlan.connect(ssid=sta_ssid,auth=(auth_type,sta_pwd))
time_out = int(time_out)
while not wlan.isconnected():
if time_out < 0:
raise Exception("Connect wifi sta timeout")
time.sleep(1)
time_out = time_out - 1
print(wlan.ifconfig())
return
def MQTTClientInit():
global mqttmsg
# wifi configuration
WIFI_SSID = 'LAPTOP-BHHF3UMN 4817'
WIFI_PASS = '******'
def sub_cb(topic, msg):
print(msg)
wlan = WLAN(mode=WLAN.STA)
wlan.connect(WIFI_SSID, auth=(WLAN.WPA2, WIFI_PASS), timeout=5000)
while not wlan.isconnected():
machine.idle()
print("Connected to WiFi\n")
client = MQTTClient("lights11", "io.adafruit.com",user="******", password="******", port=1883)
client.set_callback(sub_cb)
client.connect()
client.subscribe(topic="Yunwei/feeds/lights")
while True:
print("Sending "+mqttmsg)
client.publish(topic="Yunwei/feeds/lights", msg=mqttmsg)
time.sleep(5)
#print("Sending 222")
#client.publish(topic="Yunwei/feeds/lights", msg=mqttmsg)
client.check_msg()
time.sleep(5)
class wifi_pyboard():
def __init__(self,
server_ssid="USR-WIFI232-604_27BC",
connection_timeout=10):
self.server_ssid = server_ssid
self.timeout = connection_timeout
self.wlan = WLAN()
def connect(self):
# config as station-mode
self.wlan.init(mode=WLAN.STA)
self.wlan.ifconfig(id=0)
# Scan for an available wifi and connect to server
network_list = self.wlan.scan()
for net in network_list:
try:
if net.ssid == self.server_ssid:
print("Server founded! Connecting...")
self.wlan.connect(self.server_ssid, timeout=5000)
# wait for connection
while not self.wlan.isconnected():
# do nothing or save power by idle using machine.idle()
machine.idle()
print("Connection succeeded!")
print(self.wlan.ifconfig())
else:
# If SSID is not "USR-WIFI232-604_27BC", Do nothing.
pass
except Exception as e:
print("Maybe, access point is not avialable.")
print("Exception : {}".format(e))
def main():
# Use the RGB LED as an indicator of WiFi status
pycom.heartbeat(False)
wlan = WLAN()
if wlan.isconnected():
pycom.rgbled(0x000f00)
else:
pycom.rgbled(0x0f0000)
# Set up the onboard ADC and establish a channel for each thermistor
adc = ADC()
adc.vref(config.VREF_ACTUAL_IN_MILLIAMPS)
oven_channel = adc.channel(pin=config.OVEN_THERM_ADC_PIN, attn=ADC.ATTN_11DB)
food_channel = adc.channel(pin=config.FOOD_THERM_ADC_PIN, attn=ADC.ATTN_11DB)
# Modify config.py with your thermistor values from the datasheet
oven = Thermistor(oven_channel,
config.THERM_NOMINAL_TEMP,
config.THERM_NOMINAL_RES,
config.THERM_BETA,
config.SERIES_RESISTOR_1,
12.0)
food = Thermistor(food_channel,
config.THERM_NOMINAL_TEMP,
config.THERM_NOMINAL_RES,
config.THERM_BETA,
config.SERIES_RESISTOR_2,
12.0)
dinner_tracker = LosantDinnerTracker(oven, food, status_led=config.STATUS_LED_PIN)
dinner_tracker.start()
def wifi_connect():
global client, wlan
wlan = WLAN(mode=WLAN.STA)
wlan.disconnect()
networks = wlan.scan()
for net in networks:
if net.ssid == WIFI_AP['name']:
print('Wifi connecting...')
wlan.connect(ssid=net.ssid, auth=(net.sec, WIFI_AP['pass']), timeout=40)
while not wlan.isconnected():
idle()
sleep(1)
break
else:
return False
try:
print('MQTT connecting...')
client = MQTTClient(client_id="5bc8d724c03f971859b7747b", server="things.ubidots.com", user="******", password="******", port=1883)
#client.set_callback(sub_cb)
if client.connect() == -1:
return False
else:
return True
#client.subscribe(topic="youraccount/.../...")
except Exception as e:
return False
def connect(ssid, key):
""" Scans for and connects to the specified wifi network using key as password """
wlan = WLAN(mode=WLAN.STA)
nets = wlan.scan()
for net in nets:
if net.ssid == ssid:
wlan.connect(net.ssid, auth=(net.sec, key), timeout=5000)
while not wlan.isconnected():
machine.idle() # save power while waiting
break
def connectLocalBox(configFilePath):
f = open(configFilePath, 'r')
config=ujson.load(f)
f.close()
wlan = WLAN(mode=WLAN.STA)
wlan.ifconfig(config=(config["ip"], config["mask"],config["gateway"], config["dns"]))
wlan.scan()
wlan.connect(config["ssid"], auth=(WLAN.WPA2, config["password"]))
while not wlan.isconnected():
pass
return wlan;
def wlan_connect():
wifi = WLAN(mode=WLAN.STA)
wifi.ifconfig(config=(__myip, __netmask, __gateway, __dns))
wifi.scan() # scan for available networks
wifi.connect(ssid=__ssid, auth=(WLAN.WPA2, __nwpass))
while not wifi.isconnected():
pass
syslog('WiPy is up and running')
wifi.irq(trigger=WLAN.ANY_EVENT, wake=machine.SLEEP)
machine.sleep()
def connect_wifi(self):
from network import WLAN
if not self.cfg:
raise ValueError("Can't initialise wifi, no config")
self.log('Starting WLAN, attempting to connect to ' + ','.join(self.cfg.wifi.keys()))
wlan = WLAN(0, WLAN.STA)
wlan.ifconfig(config='dhcp')
while not wlan.isconnected():
nets = wlan.scan()
for network in nets:
if network.ssid in self.cfg.wifi.keys():
self.log('Connecting to ' + network.ssid)
self.feed_wdt() # just in case
wlan.connect(ssid=network.ssid, auth=(network.sec, self.cfg.wifi[network.ssid]))
while not wlan.isconnected():
idle()
break
self.feed_wdt() # just in case
sleep_ms(2000)
self.log('Connected as %s' % wlan.ifconfig()[0])
def connect_to_wifi_wipy(ssid, password, retries=10):
"""
Connect to a WIFI network
"""
wlan = WLAN(mode=WLAN.STA)
print("Connecting to wifi network '%s'" % ssid)
wlan.connect(ssid=ssid, auth=(WLAN.WPA2, password))
retry_count = 0
while not wlan.isconnected():
sleep(1)
retry_count += 1
if retry_count > retries:
return False
print('Connected', wlan.ifconfig())
return True
def connect_wifi(cfg=None):
if not cfg:
from config import Config
cfg = Config.load(debug=True)
from network import WLAN
import machine
print('Starting WLAN, attempting to connect to ' + cfg.wifi_ssid)
wlan = WLAN(0, WLAN.STA)
wlan.ifconfig(config='dhcp')
wlan.connect(ssid=cfg.wifi_ssid, auth=(WLAN.WPA2, cfg.wifi_key))
while not wlan.isconnected():
machine.idle()
print('Connected')
def connect_to_wifi(ssid, password, retries=10):
"""
Connect to a WIFI network
"""
try:
from network import STA_IF
except ImportError:
return connect_to_wifi_wipy(ssid, password, retries=retries)
wlan = WLAN(STA_IF)
wlan.active(True)
wlan.connect(ssid, password)
retry_count = 0
while not wlan.isconnected():
sleep(1)
retry_count += 1
if retry_count > retries:
return False
return True
def connect_to_ap(essids, tries=3):
from network import WLAN, STA_IF
from time import sleep
wlan = WLAN(STA_IF)
wlan.active(True)
## Select only known networks
ap_list = list(filter(lambda ap: ap[0].decode('UTF-8') in
essids.keys(), wlan.scan()))
## sort by signal strength
ap_list.sort(key=lambda ap: ap[3], reverse=True)
for ap in ap_list:
essid = ap[0].decode('UTF-8')
wlan.connect(essid, essids[essid])
for i in range(5):
## this is somewhat crude, we actually have a
## wlan.status() we can inspect. oh well...
if wlan.isconnected():
return True
sleep(1)
return False
def wlan():
"""Connect in STA mode, fallback to AP"""
try:
import wlanconfig
except ImportError:
print("WLAN: no wlanconfig.py")
wlanconfig = None
wlan = WLAN(mode=WLAN.AP)
except Exception as e:
print("WLAN: error in wlanconfig.py: {}".format(e))
wlanconfig = None
wlan = WLAN(mode=WLAN.AP)
else:
try:
# configure the WLAN subsystem in station mode (the default is AP)
wlan = WLAN(mode=WLAN.STA)
print("WLAN: connecting to network (AP)...")
wlan.connect(wlanconfig.ssid, auth=(WLAN.WPA2, wlanconfig.password), timeout=5000)
print("WLAN: waiting for IP...")
for tries in range(50):
if wlan.isconnected():
print(
"""\
WLAN: connected!
WiPy IP: {}
NETMASK: {}
GATEWAY: {}
DNS: {}""".format(
*wlan.ifconfig()
)
)
break
time.sleep_ms(100)
except OSError:
print("WLAN: found no router, going into AP mode instead")
wlanconfig = None
except Exception as e:
print("WLAN: error: {}".format(e))
wlanconfig = None
if wlanconfig is None:
wlan.init(mode=WLAN.AP, ssid="wipy-wlan", auth=(WLAN.WPA2, "www.wipy.io"), channel=7, antenna=WLAN.INT_ANT)
class LocalWifi:
"""
Create a local WiFi connection.
"""
ssid = ''
auth_mode = WLAN.WPA2
auth_password = ''
wlan = None
def __init__(self, ssid, ssid_password):
self.ssid = ssid
self.auth_password = ssid_password
self.wlan = WLAN(mode=WLAN.STA)
def connect(self):
self.wlan.scan()
self.wlan.connect(ssid=self.ssid, auth=(self.auth_mode, self.auth_password))
while not self.wlan.isconnected():
print('.', end="")
print("\nConnected to:\n", self.wlan.ifconfig())
def wlan():
"""Connect in STA mode, fallback to AP"""
log = ulog.Logger('WLAN: ')
try:
import wlanconfig
except ImportError:
log.notice('no wlanconfig.py')
wlanconfig = None
wlan = WLAN(mode=WLAN.AP)
except Exception as e:
log.error('error in wlanconfig.py: {}'.format(e))
wlanconfig = None
wlan = WLAN(mode=WLAN.AP)
else:
try:
# configure the WLAN subsystem in station mode (the default is AP)
wlan = WLAN(mode=WLAN.STA)
log.info('connecting to network (AP)...')
wlan.connect(wlanconfig.ssid, auth=(WLAN.WPA2, wlanconfig.password), timeout=5000)
log.info('waiting for IP...')
for tries in range(50):
if wlan.isconnected():
log.notice('''connected!
WiPy IP: {}
NETMASK: {}
GATEWAY: {}
DNS: {}'''.format(*wlan.ifconfig()))
break
time.sleep_ms(100)
except OSError:
log.error('found no router, going into AP mode instead')
wlanconfig = None
except Exception as e:
log.error('error: {}'.format(e))
wlanconfig = None
if wlanconfig is None:
wlan.init(mode=WLAN.AP, ssid='wipy-wlan', auth=(WLAN.WPA2,'www.wipy.io'), channel=7, antenna=WLAN.INT_ANT)
def wlan():
with open('/flash/wificonfig.txt') as f:
ssid = f.readline().strip()
passwd = f.readline().strip()
# configure the WLAN subsystem in station mode (the default is AP)
print('WLAN: connecting to network (AP)...')
wlan = WLAN(mode=WLAN.STA)
try:
wlan.connect(ssid, auth=(WLAN.WPA2, passwd), timeout=5000)
print('WLAN: waiting for IP...')
for tries in range(50):
if wlan.isconnected():
print('''\
WLAN: connected!
WiPy IP: {}
NETMASK: {}
GATEWAY: {}
DNS: {}'''.format(*wlan.ifconfig()))
break
time.sleep_ms(100)
except OSError:
print('WLAN: found no router, going into AP mode instead')
wlan.init(mode=WLAN.AP, ssid='wipy-wlan', auth=(WLAN.WPA2,'www.wipy.io'), channel=7, antenna=WLAN.INT_ANT)
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, ssid, password, 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.wlan = 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.
"""
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()
# 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 {:.1f} 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 WLAN
self.wlan.disconnect()
self.wlan.deinit()
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 _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_us() < tmst:
pass
self.lora_sock.send(data)
self._log(
'Sent downlink packet scheduled on {:.3f}, at {:.1f} 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_us() - 12500
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"] * 1000000)
),
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)
))
from network import WLAN
wlan = WLAN() # get current object, without changing the mode
# Settings for TP-LINK home network
KEY = ''
IP = '192.168.1.253' # WiPy Fixed IP address
GATEWAY = '192.168.1.1' # IP address of gateway
DNS = '192.168.1.1' # IP address of DNS
NETMASK = '255.255.255.0' # Netmask for this subnet
if machine.reset_cause() != machine.SOFT_RESET:
print('Switching to Wifi Device Mode')
wlan.init(WLAN.STA)
wlan.ifconfig(config=(IP, NETMASK, GATEWAY, DNS))
if not wlan.isconnected():
print('Attempting to connect to WiFi', end=' ')
nets = wlan.scan()
for net in nets:
if net.ssid == 'Robotmad':
KEY = 'mou3se43'
break
elif net.ssid == 'CoderDojo':
KEY = 'coderdojo'
break
if KEY != '':
print(net.ssid, end=" ")
wlan.connect(net.ssid, auth=(net.sec, KEY), timeout=10000)
if wlan.isconnected():
print('Connected')
tim_a.freq(10)
from machine import Timer
from machine import Pin
import BlynkLib
from network import WLAN
WIFI_SSID = 'YOUR_WIFI_SSID'
WIFI_AUTH = (WLAN.WPA2, 'YOUR_WIFI_PASSORD')
BLYNK_AUTH = 'YOUR_BLYNK_AUTH'
# connect to WiFi
wifi = WLAN(mode=WLAN.STA)
wifi.connect(WIFI_SSID, auth=WIFI_AUTH, timeout=5000)
while not wifi.isconnected():
pass
print('IP address:', wifi.ifconfig()[0])
# assign GP9, GP10, GP11, GP24 to alternate function (PWM)
p9 = Pin('GP9', mode=Pin.ALT, alt=3)
p10 = Pin('GP10', mode=Pin.ALT, alt=3)
p11 = Pin('GP11', mode=Pin.ALT, alt=3)
p24 = Pin('GP24', mode=Pin.ALT, alt=5)
# timer in PWM mode and width must be 16 buts
timer10 = Timer(4, mode=Timer.PWM, width=16)
timer9 = Timer(3, mode=Timer.PWM, width=16)
timer1 = Timer(1, mode=Timer.PWM, width=16)
# enable channels @1KHz with a 50% duty cycle
pwm9 = timer9.channel(Timer.B, freq=700, duty_cycle=100)
pwm10 = timer10.channel(Timer.A, freq=700, duty_cycle=100)
from machine import UART
import machine
import os
from network import WLAN
uart = UART(0, baudrate=115200)
os.dupterm(uart)
wifi_ssid = 'YOURWIFISSID'
wifi_pass = '******'
if machine.reset_cause() != machine.SOFT_RESET:
wlan = WLAN(mode=WLAN.STA)
wlan.connect(wifi_ssid, auth=(WLAN.WPA2, wifi_pass), timeout=5000)
while not wlan.isconnected():
machine.idle()
machine.main('main.py')
class NanoGateway:
def __init__(self, id, frequency, datarate, ssid, password, server, port, ntp='pool.ntp.org', ntp_period=3600):
self.id = id
self.frequency = frequency
self.datarate = datarate
self.sf = self._dr_to_sf(datarate)
self.ssid = ssid
self.password = password
self.server = server
self.port = port
self.ntp = ntp
self.ntp_period = ntp_period
self.rxnb = 0
self.rxok = 0
self.rxfw = 0
self.dwnb = 0
self.txnb = 0
self.stat_alarm = None
self.pull_alarm = None
self.uplink_alarm = None
self.udp_lock = _thread.allocate_lock()
self.lora = None
self.lora_sock = None
def start(self):
# Change WiFi to STA mode and connect
self.wlan = WLAN(mode=WLAN.STA)
self._connect_to_wifi()
# Get a time Sync
self.rtc = machine.RTC()
self.rtc.ntp_sync(self.ntp, update_period=self.ntp_period)
# Get the server IP and create an UDP socket
self.server_ip = socket.getaddrinfo(self.server, self.port)[0][-1]
self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
self.sock.setsockopt(socket.SOL_SOCKET, socket.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
_thread.start_new_thread(self._udp_thread, ())
# Initialize LoRa in LORA mode
self.lora = LoRa(mode=LoRa.LORA, frequency=self.frequency, bandwidth=LoRa.BW_125KHZ, sf=self.sf,
preamble=8, coding_rate=LoRa.CODING_4_5, tx_iq=True)
# Create a raw LoRa socket
self.lora_sock = socket.socket(socket.AF_LORA, socket.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)
def stop(self):
# TODO: Check how to stop the NTP sync
# TODO: Create a cancel method for the alarm
# TODO: kill the UDP thread
self.sock.close()
def _connect_to_wifi(self):
self.wlan.connect(self.ssid, auth=(None, self.password))
while not self.wlan.isconnected():
time.sleep(0.5)
print("WiFi connected!")
def _dr_to_sf(self, dr):
sf = dr[2:4]
if sf[1] not in '0123456789':
sf = sf[:1]
return int(sf)
def _sf_to_dr(self, sf):
return self.datarate
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 json.dumps(STAT_PK)
def _make_node_packet(self, rx_data, rx_time, tmst, sf, 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]["datr"] = self._sf_to_dr(sf)
RX_PK["rxpk"][0]["rssi"] = rssi
RX_PK["rxpk"][0]["lsnr"] = float(snr)
RX_PK["rxpk"][0]["data"] = binascii.b2a_base64(rx_data)[:-1]
RX_PK["rxpk"][0]["size"] = len(rx_data)
return json.dumps(RX_PK)
def _push_data(self, data):
token = os.urandom(2)
packet = bytes([PROTOCOL_VERSION]) + token + bytes([PUSH_DATA]) + binascii.unhexlify(self.id) + data
with self.udp_lock:
try:
self.sock.sendto(packet, self.server_ip)
except Exception:
print("PUSH exception")
def _pull_data(self):
token = os.urandom(2)
packet = bytes([PROTOCOL_VERSION]) + token + bytes([PULL_DATA]) + binascii.unhexlify(self.id)
with self.udp_lock:
try:
self.sock.sendto(packet, self.server_ip)
except Exception:
print("PULL exception")
def _ack_pull_rsp(self, token, error):
TX_ACK_PK["txpk_ack"]["error"] = error
resp = json.dumps(TX_ACK_PK)
packet = bytes([PROTOCOL_VERSION]) + token + bytes([PULL_ACK]) + binascii.unhexlify(self.id) + resp
with self.udp_lock:
try:
self.sock.sendto(packet, self.server_ip)
except Exception:
print("PULL RSP ACK exception")
def _lora_cb(self, lora):
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()
#self._push_data(self._make_node_packet(rx_data, self.rtc.now(), stats.rx_timestamp, stats.sfrx, stats.rssi, stats.snr))
# Fix the "not joined yet" issue: https://forum.pycom.io/topic/1330/lopy-lorawan-gateway-with-an-st-lorawan-device/2
self._push_data(self._make_node_packet(rx_data, self.rtc.now(), time.ticks_us(), stats.sfrx, stats.rssi, stats.snr))
self.rxfw += 1
if events & LoRa.TX_PACKET_EVENT:
self.txnb += 1
lora.init(mode=LoRa.LORA, frequency=self.frequency, bandwidth=LoRa.BW_125KHZ,
sf=self.sf, preamble=8, coding_rate=LoRa.CODING_4_5, tx_iq=True)
def _send_down_link(self, data, tmst, datarate, frequency):
self.lora.init(mode=LoRa.LORA, frequency=frequency, bandwidth=LoRa.BW_125KHZ,
sf=self._dr_to_sf(datarate), preamble=8, coding_rate=LoRa.CODING_4_5,
tx_iq=True)
while time.ticks_us() < tmst:
pass
self.lora_sock.send(data)
def _udp_thread(self):
while True:
try:
data, src = self.sock.recvfrom(1024)
_token = data[1:3]
_type = data[3]
if _type == PUSH_ACK:
print("Push ack")
elif _type == PULL_ACK:
print("Pull ack")
elif _type == PULL_RESP:
self.dwnb += 1
ack_error = TX_ERR_NONE
tx_pk = json.loads(data[4:])
tmst = tx_pk["txpk"]["tmst"]
t_us = tmst - time.ticks_us() - 5000
if t_us < 0:
t_us += 0xFFFFFFFF
if t_us < 20000000:
self.uplink_alarm = Timer.Alarm(handler=lambda x: self._send_down_link(binascii.a2b_base64(tx_pk["txpk"]["data"]),
tx_pk["txpk"]["tmst"] - 10, tx_pk["txpk"]["datr"],
int(tx_pk["txpk"]["freq"] * 1000000)), us=t_us)
else:
ack_error = TX_ERR_TOO_LATE
print("Downlink timestamp error!, t_us:", t_us)
self._ack_pull_rsp(_token, ack_error)
print("Pull rsp")
except socket.timeout:
pass
except OSError as e:
if e.errno == errno.EAGAIN:
pass
else:
print("UDP recv OSError Exception")
except Exception:
print("UDP recv Exception")
# Wait before trying to receive again
time.sleep(0.025)
class NanoGateWay:
def __init__(self):
self.sock = None
self.connected = False
self.wlan = WLAN(mode=WLAN.STA)
self.riders = {} # dictionary of riders
# initialize LoRa as a Gateway (with Tx IQ inversion)
self.lora = LoRa(tx_iq=True, rx_iq=False)
def connect_to_wlan(self):
if not self.wlan.isconnected():
# TODO: change for the correct credentials here (ssid and password)
self.wlan.connect(ssid='KCOMIoT', auth=(None, '10noCHOSun'), timeout=7000)
while not self.wlan.isconnected():
time.sleep_ms(50)
def connect_to_server(self):
if self.sock:
self.sock.close()
self.sock = socket.socket() # TCP
try:
self.sock.connect((TCP_IP, TCP_PORT)) # TODO
self.sock.settimeout(1)
self.connected = True
except Exception:
self.sock.close() # just close the socket and try again later
print('Socket connect failed, retrying...')
time.sleep_ms(500)
def send(self, msg):
if self.connected and self.sock:
try:
self.sock.send(msg)
except Exception:
self.connected = False
self.sock.close()
self.sock = None
def new_rider(self, name, company, badge, bike, eventid, ridetimestamp):
rider = Rider(name, company, badge, bike, eventid, ridetimestamp)
self.riders[bike] = rider
def recv(self):
if self.connected and self.sock:
try:
data = self.sock.recv(1024)
except socket.timeout:
return None
except socket.error as e:
if e.args[0] != EAGAIN:
self.connected = False
return None
return data
def run(self):
data = self.recv()
if data:
print(data)
parsed_json = json.loads(data.decode('ascii'))
print(parsed_json)
if parsed_json['RideStatus'] == "started":
self.new_rider(parsed_json['RiderName'], parsed_json['Company'],
parsed_json['BadgeNumber'], parsed_json['BikeID'],parsed_json['EventID'],parsed_json['RideTimestamp'])
# start the race
print(str({'id':parsed_json['BikeID'], 'cm': 's'}))
packet_tx = json.dumps({'id':parsed_json['BikeID'], 'cm': 's'})
print ("packet_tx = " + packet_tx)
self.lora.send(packet_tx, True)
lora_d = self.lora.recv()
if lora_d:
parsed_json = json.loads(lora_d.decode('ascii'))
print(parsed_json)
# update the rider info (if the rider already exists)
bike_id = parsed_json['id']
if bike_id in self.riders:
self.riders[bike_id].speed = parsed_json['sp']
self.riders[bike_id].distance = parsed_json['ds']
self.riders[bike_id].crank = parsed_json['cr']
if parsed_json['st'] == 'i' or parsed_json['st'] == 'f':
self.riders[bike_id].status = 'finished'
elif parsed_json['st'] == 'r':
self.riders[bike_id].status = 'counting'
else:
self.riders[bike_id].status = 'started'
# Assemble the TCP packet
wheel_count=self.riders[bike_id].crank * 7
json_d = {"RiderName":self.riders[bike_id].name, "Company":self.riders[bike_id].company, "BadgeNumber":self.riders[bike_id].badge, \
"EventID":self.riders[bike_id].eventid, "RideTimestamp":'{:f}'.format(self.riders[bike_id].ridetimestamp), "BikeID":bike_id, \
"RideStatus":self.riders[bike_id].status, "RideInfo":[{"CounterTimestamp": float(time.ticks_ms()), \
"CrankCounter":self.riders[bike_id].crank, "WheelCounter":wheel_count}]}
json_str = json.dumps(json_d)
print("Outgoing from Gateway: " + str(json_str))
self.send(json_str+"\n")
if not self.connected:
self.connect_to_wlan()
self.connect_to_server()
wifi.antenna(WLAN.INT_ANT)
wifi.mode(WLAN.STA)
print(wifi.mode() == WLAN.STA)
wifi.connect(testconfig.wlan_ssid, auth=testconfig.wlan_auth, timeout=10000)
wait_for_connection(wifi)
wifi.ifconfig(config='dhcp')
wait_for_connection(wifi)
print('0.0.0.0' not in wifi.ifconfig())
wifi.ifconfig(0, ('192.168.178.109', '255.255.255.0', '192.168.178.1', '8.8.8.8'))
wait_for_connection(wifi)
print(wifi.ifconfig(0) == ('192.168.178.109', '255.255.255.0', '192.168.178.1', '8.8.8.8'))
wait_for_connection(wifi)
print(wifi.isconnected() == True)
wifi.disconnect()
print(wifi.isconnected() == False)
t0 = time.ticks_ms()
wifi.connect(testconfig.wlan_ssid, auth=testconfig.wlan_auth, timeout=0)
print(time.ticks_ms() - t0 < 500)
wifi.disconnect()
print(wifi.isconnected() == False)
# test init again
wifi.init(WLAN.AP, ssid='www.wipy.io', auth=None, channel=5, antenna=WLAN.INT_ANT)
print(len(wifi.mac()) == 6)