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import time
import serial
import os
from pyroute2 import IPRoute
import sys
import re
import threading
import signal
import traceback
import os
# configure the serial connections (the parameters differs on the device you are connecting to)
#First we find an open port to work with
serial_port=''
max_ports=100
for port in range(1,100):
serial_port = '/dev/ttyUSB'+str(port)
if os.path.exists(serial_port) == True:
break
print 'Using Serial port : ' + serial_port
#serial_port = '/dev/ttyUSB2'
bandrich_ppd_config = '$OPENAIR_DIR/cmake_targets/autotests/tools/wdial.bandrich.conf'
exit_flag=0
def signal_handler(signal, frame):
print('You pressed Ctrl+C!')
print('Resetting the UE to detached state')
timeout=10
exit_flag=1
send_command('AT+CGATT=0' , 'OK' , timeout)
sys.exit(0)
signal.signal(signal.SIGINT, signal_handler)
ser = serial.Serial(
port=serial_port,
#baudrate=9600,
#parity=serial.PARITY_ODD,
#stopbits=serial.STOPBITS_TWO,
#bytesize=serial.EIGHTBITS
)
#ser.open()
#ser.isOpen()
class pppThread (threading.Thread):
def __init__(self, threadID, name, counter):
threading.Thread.__init__(self)
self.threadID = threadID
self.name = name
self.counter = counter
def run(self):
print "Starting " + self.name
#Here we keep running pppd thread in indefinite loop as this script terminates sometimes
#while 1:
while 1:
time.sleep(5) #Hard coded, do not reduce this number!
print "Starting wvdial now..."
print 'exit_flag = ' + str(exit_flag)
send_command('AT+CGATT=1','OK', 300)
os.system('wvdial -C ' + bandrich_ppd_config + '' )
if exit_flag == 1:
print "Exit flag set to true. Exiting pppThread now"
print "Terminating wvdial now..."
def send_command (cmd, response, timeout):
count=0
sleep_duration = 1
while count <= timeout:
try:
ser.write (cmd + '\r\n')
out = ''
time.sleep(sleep_duration)
count = count + sleep_duration
while ser.inWaiting() > 0:
out += ser.read(1)
print 'out = <' + out + '> response = <' + response + '> \n'
if re.search(response, out):
break
except Exception, e:
error = ' cmd : ' + cmd + ' response : ' + response
error = error + ' In function: ' + sys._getframe().f_code.co_name + ': *** Caught exception: ' + str(e.__class__) + " : " + str( e)
error = error + traceback.format_exc()
print error
def start_ue () :
#print 'Enter your commands below.\r\nInsert "exit" to leave the application.'
timeout=60 #timeout in seconds
send_command('AT', 'OK' , timeout)
send_command('AT+CGATT=0' , 'OK' , timeout)
send_command('AT+CGATT=1','OK', 300)
#os.system('wvdial -C ' + bandrich_ppd_config + ' &' )
thread_ppp = pppThread(1, "ppp_thread", 1)
thread_ppp.start()
iface='ppp0'
while 1:
time.sleep ( 2)
#Now we check if ppp0 interface is up and running
try:
if exit_flag == 1:
break
ip = IPRoute()
idx = ip.link_lookup(ifname=iface)[0]
os.system ('route add 192.172.0.1 ppp0')
break
except Exception, e:
error = ' Interface ' + iface + 'does not exist...'
error = error + ' In function: ' + sys._getframe().f_code.co_name + ': *** Caught exception: ' + str(e.__class__) + " : " + str( e)
error = error + traceback.format_exc()
print error
thread_ppp.join()
def stop_ue():
timeout=60
os.system('killall wvdial')
send_command('AT', 'OK' , timeout)
send_command('AT+CGATT=0' , 'OK' , timeout)
for arg in sys.argv[1:]:
if arg == '--start-ue' :
start_ue()
elif arg == '--stop-ue' :
stop_ue()
else :
print " Script called with wrong arguments, arg = " + arg
sys.exit()