def send_backend_data(sim: ubirch.SimProtocol, modem: Modem, conn: Connection,
api_function, uuid, data) -> (int, bytes):
MAX_MODEM_RESETS = 1 # number of retries with modem reset before giving up
MAX_RECONNECTS = 1 # number of retries with reconnect before trying a modem reset
for reset_attempts in range(MAX_MODEM_RESETS + 1):
# check if this is a retry for reset_attempts
if reset_attempts > 0:
print("\tretrying with modem reset")
sim.deinit()
modem.reset(
) # TODO: should probably be connection.reset_hardware()
conn.connect()
# try to send multiple times (with reconnect)
try:
for send_attempts in range(MAX_RECONNECTS + 1):
# check if this is a retry for send_attempts
if send_attempts > 0:
print("\tretrying with disconnect/reconnect")
conn.disconnect()
conn.connect()
try:
print("\tsending...")
return api_function(uuid, data)
except Exception as e:
# TODO: log/print exception?
print("\tsending failed: {}".format(e))
# (continues to top of send_attempts loop)
else:
# all send attempts used up
raise Exception("all send attempts failed")
except Exception as e:
print(repr(e))
# (continues to top of reset_attempts loop)
else:
# all modem resets used up
raise Exception("could not establish connection to backend")
max_file_size_kb=max_file_size_kb,
sd_card=SD_CARD_MOUNTED)
try:
# get system information
print("pycom firmware: ", uname())
# print("modem firmware: ", sqnsupgrade.info())
# initialize modem
lte = LTE()
modem = Modem(lte, error_handler)
try:
# reset modem on any non-normal loop (modem might be in a strange state)
if not COMING_FROM_DEEPSLEEP:
print("++ not coming from sleep, resetting modem")
modem.reset()
print("++ getting IMSI")
imsi = modem.get_imsi()
print("IMSI: " + imsi)
except Exception as e:
print("\tERROR setting up modem")
error_handler.log(e, COLOR_MODEM_FAIL)
while True:
machine.idle()
set_led(LED_TURQUOISE)
# load configuration, blocks in case of failure
print("++ loading config")
try: