def checkSIM():
print('-> Checking SIM status')
if (send_at('AT+CPIN?', 'READY', 1) == 1):
print(' -> SIM ready')
return 1
else:
if (send_at('AT+CPIN?', 'SIM PIN', 1) == 1):
print(' -> SIM pin required!')
return 0
else:
print(' -> SIM error')
return 2
def power_up():
if (send_at('AT', 'OK', 1) == 1):
print('Already active')
else:
print('SIM7070X is starting...')
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
GPIO.setup(power_key, GPIO.OUT)
time.sleep(0.1)
GPIO.output(power_key, GPIO.HIGH)
time.sleep(2)
GPIO.output(power_key, GPIO.LOW)
time.sleep(1)
ser.flushInput()
while (send_at('AT', 'OK', 1) == 0):
time.sleep(1)
send_at('AT', 'OK', 1)
print('SIM7070X is ready!')
def power_down():
if (send_at('AT', 'OK', 1) != 1):
print('Already powered off')
else:
print('Shutting SIM7070X down...')
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
GPIO.setup(power_key, GPIO.OUT)
time.sleep(0.1)
GPIO.output(power_key, GPIO.HIGH)
time.sleep(2)
GPIO.output(power_key, GPIO.LOW)
time.sleep(1)
ser.flushInput()
while (send_at('AT', 'OK', 1) == 1):
time.sleep(1)
send_at('AT', 'OK', 1)
print('SIM7070X is sleeping!')
def register():
print('Try to register network...')
if (checkSIM()):
roamingFix()
# enable network registration
send_at('AT+CREG=1', 'OK', 1)
# wait for successful registration
print('-> Registering...')
while (send_at('AT+CREG?', '1,1', 1) != 1):
time.sleep(1)
print(' -> Success!')
buff = send_at_get_result('AT+COPS?', 'OK', 1)
print(' -> Registered to: ' + buff.split(',')[2])
print('-> Attach to GPRS/LTE now')
send_at('AT+CGATT=1', 'OK', 1)
while (send_at('AT+CGATT?', '1', 1) != 1):
time.sleep(1)
print('-> Set PDP Context')
send_at('AT+CGDCONT=1,"IP","em"', 'OK', 1)
print('-> Registration done. Ready to communicate!')
def roamingFix():
# set preferred mode to automatic (other options are lte or gsm only)
send_at('AT+CNMP=2', 'OK', 1)
def initConnection():
print(' -> Init a new connection')
send_at_get_result('AT+SMDISC', 'OK',
1) #disconnect from what might be a broken pipe
send_at('AT+CGMR', 'OK', 0.1)
send_at('AT+CMEE=0', 'OK', 0.1)
send_at('AT+CSQ', 'OK', 0.1)
send_at('AT+CPSI?', 'OK', 0.1)
send_at('AT+CGREG?', '+CGREG: 0,1', 0.1)
buff = send_at_get_result('AT+COPS?', 'OK', 1)
print(' -> Registered to: ' + buff.split(',')[2])
if ('0,0' in send_at_get_result('AT+CNACT?', 'OK', 0.1)):
send_at('AT+CNACT=0,1', 'OK', 0.5)
if ('0' not in send_at_get_result('AT+CACID?', 'OK', 0.1)):
send_at('AT+CACID=0', 'OK', 0.1)
if ('0' in send_at_get_result('AT+SMSTATE?', 'OK', 0.1)):
send_at('AT+SMCONF="CLIENTID","id"', 'OK', 0.1)
send_at('AT+SMCONF="URL","' + MQTT_SERVER + '","' + MQTT_PORT + '"',
'OK', 0.1)
send_at('AT+SMCONF="KEEPTIME",60', 'OK', 0.1)
send_at('AT+SMCONF="QOS",1', 'OK', 0.1)
send_at('AT+SMCONN', 'OK', 1)