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#!/usr/bin/python
import serial
import time
import sys
import re
modem_device = "/dev/ttyACM1"
apn = "web.vodafone.de"
# TODO: AT*EGNCI (gsm-only)
# AT*EWNCI (umts-only)
# AT+COPS (operator select)
#
# *EGNCI: "26202","026E","00000000",6,50,24
#
# *EWNCI:
# UARFCN,PSC,RSCP,ECNO,PathLoss
# 10588 ,287,36 ,14 ,158
#
# UARFCN = Channel, RSCP = RSSI, CID = PSC
# RNCid = CID_lang / 65536 (sometimes(?) == LAC)
# CID = CID_lang % 65536
#
def send_command(modem, cmd, text):
modem.write(cmd)
if text != None:
print text + ": ",
response = modem.readlines()
if text != None:
print ('ERROR\r\n' in response and "Error" or "OK")
return response
def get_pin_state(modem):
modem.write('AT+CPIN?\r')
response = modem.readlines()
if "+CPIN: SIM PIN\r\n" in response:
return False
elif "+CPIN: READY\r\n" in response:
return True
else:
print "[get_pin_state] Unknown response",
print response
return False
# determine whether there is a gsm or umts connection
# -1: unknown
# 0: gsm
# 2: umts
def connection_mode(modem):
response = send_command(modem, 'AT+COPS?\r', None)
for line in response:
if line.startswith('+COPS: '):
values = line[7:].strip().split(',')
if len(values) == 1:
return -1
else:
return int(values[-1])
return -1
def cell_info(modem):
cells = set()
# get GSM cell information
send_command(modem, 'AT+CFUN=5\r', None)
while connection_mode(modem) != 0:
time.sleep(1)
# get connected station
modem.write('AT+CREG=2\r')
modem.readlines()
modem.write('AT+CREG?\r')
response = modem.readlines()
modem.write('AT+CREG=0\r')
modem.readlines()
for line in response:
if line.startswith('+CREG: '):
results = line.rstrip()[7:].split(',')
if len(results) == 4:
lac = int(results[2].strip('"'), 16)
cid = int(results[3].strip('"'), 16)
break
modem.write('AT*EHNET=2\r')
response = modem.readlines()
for line in response:
if line.startswith('*EHNET: '):
mcc = int(line[8:].rstrip().strip('"')[:3])
mnc = int(line[8:].rstrip().strip('"')[3:])
cells.add((mcc, mnc, lac, cid))
# check stations until all are known (i.e. no '???' in response)
retry = True
while retry:
retry = False
response = send_command(modem, 'AT*EGNCI\r', None)
if 'ERROR\r\n' in response:
print "error"
retry = True
time.sleep(1)
continue
for line in response:
if line.startswith('*EGNCI: '):
values = line[8:].rstrip().split(',')
try:
mcc = int(values[0].strip('"')[:3])
mnc = int(values[0].strip('"')[3:])
lac = int(values[1].strip('"'), 16)
cid = int(values[2].strip('"'), 16)
if cid == 0:
continue
cells.add((mcc, mnc, lac, cid))
except:
retry = True
print "retrying"
time.sleep(2)
break
for (mcc, mnc, lac, cid) in cells:
print "MCC: " + str(mcc) + ", MNC: " + str(mnc) + ", LAC: " + str(lac) + ", CellID: " + str(cid)
# # get UMTS cell information
# send_command(modem, 'AT+CFUN=6\r', None)
# time.sleep(10)
# response = send_command(modem, 'AT*EWNCI\r', None)
# for line in response:
# if line.startswith('*EWNCI: '):
# print line.rstrip()
# # switch back to default mode
# send_command(modem, 'AT+CFUN=1\r', None)
def print_state(modem):
modem.timeout = 0.1
modem.write('AT+CSQ\r')
response = modem.readlines()
for line in response:
if line.startswith('+CSQ: '):
signal = line.rstrip()[6:].split(',')[0]
print "Signal: " + signal + "/31"
break
mcc, mnc, lac, cid = -1, -1, -1, -1
modem.write('AT*EHNET=2\r')
response = modem.readlines()
for line in response:
if line.startswith('*EHNET: '):
mcc = line[8:].rstrip().strip('"')[:3]
mnc = line[8:].rstrip().strip('"')[3:]
break
modem.write('AT+CREG=2\r')
modem.readlines()
modem.write('AT+CREG?\r')
response = modem.readlines()
modem.write('AT+CREG=0\r')
modem.readlines()
for line in response:
if line.startswith('+CREG: '):
results = line.rstrip()[7:].split(',')
if len(results) == 4:
lac = int(results[2].strip('"'), 16)
cid = int(results[3].strip('"'), 16) % 65536 # last 2 bytes for umts
break
print "MCC: " + str(mcc) + ", MNC: " + str(mnc) + ", LAC: " + str(lac) + ", CellID: " + str(cid)
def start_modem(modem):
if not get_pin_state(modem):
pin = raw_input("Please enter PIN: ")
send_command(modem, 'AT+CPIN="' + pin + '"\r', "Sending PIN")
send_command(modem, 'AT+CFUN=1\r', "Starting modem")
def connect(modem):
send_command(modem, 'AT+CGDCONT=1,"IP","' + apn + '"\r', "Setting up")
send_command(modem, 'AT*ENAP=1,1\r', "Connecting")
def disconnect(modem):
send_command(modem, 'AT*ENAP=0\r', "Disconnecting")
def stop_modem(modem):
send_command(modem, 'AT+CFUN=4\r', "Stopping")
def show_usage():
print "Usage: " + sys.argv[0] + " <command>"
print "\tstart: switch on modem and unlock sim"
print "\tstop: switch modem to powersave state"
print "\tconnect: connect to internet"
print "\tdisconnect: disconnect from internet"
print "\tstate: show signal/base station info"
print "\tcellinfo: show info about all received cells"
if len(sys.argv) != 2:
show_usage()
sys.exit(0)
modem = serial.Serial(modem_device, timeout=0.5)
modem.readlines()
if sys.argv[1] == "start":
start_modem(modem)
elif sys.argv[1] == "stop":
stop_modem(modem)
elif sys.argv[1] == "connect":
start_modem(modem)
connect(modem)
elif sys.argv[1] == "disconnect":
disconnect(modem)
stop_modem(modem)
elif sys.argv[1] == "state":
print_state(modem)
elif sys.argv[1] == "cellinfo":
# start_modem(modem)
cell_info(modem)
else:
show_usage()
modem.close()
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