from network import LTE
from mqtt import MQTTClient
from machine import I2C
import bme280
import json
import utime
import re
def send_at_cmd_pretty(cmd):
response = lte.send_at_cmd(cmd).split('\r\n')
for line in response:
print(line)
lte = LTE()
send_at_cmd_pretty('AT+CFUN=0')
send_at_cmd_pretty('AT!="clearscanconfig"')
send_at_cmd_pretty('AT!="addscanfreq band=20 dl-earfcn=6300"')
send_at_cmd_pretty('AT!="zsp0:npc 1"')
send_at_cmd_pretty('AT+CGDCONT=1,"IP","iot.swisscom.ch"')
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"')
from network import LTE
import urequests as requests
lte = LTE()
def send_at_cmd_pretty(cmd):
response = lte.send_at_cmd(cmd).split('\r\n')
for line in response:
print(line)
print("Main ..............................")
print("gps is")
print(lat,lon)
print("Mac ID is ..")
print(dev_id)
print("Wakeup reason")
print(reason)
print("Voltage is ..")
print(voltage)
send_at_cmd_pretty('AT+CFUN=0')
send_at_cmd_pretty('AT!="clearscanconfig"')
send_at_cmd_pretty('AT!="addscanfreq band=28 dl-earfcn=9410"')
send_at_cmd_pretty('AT+CGDCONT=1,"IP","telstra.m2m"')
send_at_cmd_pretty('AT+CEREG=2')
send_at_cmd_pretty('AT+CFUN=1')
lteAttachAttemptCount = 0
import ufirebase as firebase
import ws2812
from network import LTE
import json
import ledConf
from machine import CAN
#Creating socket
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
pycom.heartbeat(False)
# Need to use global variables.
# If in each function you delare a new reference, functionality is broken
lte = LTE()
# Returns a network.LTE object with an active Internet connection.
def getLTE():
# If already used, the lte device will have an active connection.
# If not, need to set up a new connection.
if lte.isconnected():
return lte
# Modem does not connect successfully without first being reset.
print("Resetting LTE modem ... ", end='')
lte.send_at_cmd('AT^RESET')
print("OK")
time.sleep(1)
def __init__(self):
from network import LTE
self.lte = LTE()
self.at('RRC:setDbgPerm full')
from ubirch import SimProtocol
print("\n- - - UBIRCH protocol (SIM) - - -\n")
# load some necessary config (request API keys from ubirch)
with open("config.json") as f:
cfg = json.load(f)
UPP_SERVER = 'niomon.{}.ubirch.com'.format(cfg["env"])
KEY_SERVER = 'key.{}.ubirch.com'.format(cfg["env"])
BOOT_SERVER = 'api.console.{}.ubirch.com'.format(cfg["env"])
device_name = "ukey"
cert_id = "ucrt"
lte = LTE()
if machine.reset_cause() != machine.DEEPSLEEP_RESET:
#if we are not coming from deepsleep, the modem is probably in a strange state -> reset
print("Not coming from sleep, resetting modem to be safe...")
reset_modem(lte,debug_print=cfg.get("debug", False))
if 'wifi' in cfg:
nb_iot_connection = False
func_lvl = 4 # disable modem transmit and receive RF circuits
else:
nb_iot_connection = True
func_lvl = 1 # full modem functionality
# set up modem
try:
def reconnect_uart():
if hasattr(LTE, 'reconnect_uart'):
LTE.reconnect_uart()
def uart_mirror(self, color):
import pycom
pycom.heartbeat(False)
time.sleep(.5)
pycom.rgbled(color)
LTE.modem_upgrade_mode()
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 __init__(self):
self.lte = LTE()
import socket
import ssl
import time
from network import LTE
import binascii
import machine
import os
uid = binascii.hexlify(machine.unique_id())
name = os.uname().sysname.lower() + '-' + uid.decode("utf-8")[-4:]
print(name, "lte_simple.py")
print("init")
t = time.time()
lte = LTE(debug=True)
# lte.send_at_cmd('AT+COPS=?')
# '\r\n+COPS: (2,"Vodafone@","VF","20404",9),,(0,1,2,3,4),(0,1,2)\r\n\r\nOK\r\n'
print("attach")
#### amarisoft (the "anritsu" or the "blank" sim)
# lte.attach()
# lte.attach(band=20)
# lte.attach(band=20)
# lte.attach(apn="Internet")
#### pycom vodafone
# lte.attach(apn="pycom.io", band=20)
# lte.attach(apn="pycom.io")
#### vodafone
# lte.attach()
# lte.attach(cid=1, band=20, apn="spe.inetd.vodafone.nbiot", type=LTE.IP)
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)
print(lora.frequency())
print(lora.has_joined())
print(lora.tx_power())
print(lora.power_mode())
#print(lora.stats())
except:
pass
try:
print("===== sigfox =====================================")
from network import Sigfox
sigfox = Sigfox(mode=Sigfox.SIGFOX, rcz=Sigfox.RCZ1)
print("id", ubinascii.hexlify(sigfox.id()))
print("mac", ubinascii.hexlify(sigfox.mac()))
print("pac", ubinascii.hexlify(sigfox.pac()))
print("frequencies", sigfox.frequencies())
except:
pass
try:
print("===== lte ========================================")
from network import LTE
lte = LTE()
print("imei", lte.imei())
print("iccid", lte.iccid())
print("is_connected", lte.isconnected())
print("ue_coverage", lte.ue_coverage())
# print("time", lte.time())
except:
pass
""" Meerkat Pycom LTE module
Note: Use global variables, if in each function you delare a new reference,
functionality is broken.
Refactored from post by user mattliddle at:
https://forum.pycom.io/topic/3021/gpy-with-hologram-io-sim?page=1
"""
import socket
import time
import pycom
from network import LTE
lte_modem = LTE()
def LTE_init(verbose=False):
"""Connect to LTE network using hologram.io SIM. If network connection
is already in use, returns the LTE device's connection, otherwise will
set up a new connection.
Parameters
----------
verbose : bool, print debug statements
Returns
-------
network.LTE object with an active Internet connection
"""
if lte_modem.isconnected():
if verbose: print('LTE Modem already connected.')
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