modem_check_reset.py - check our internet connection and reset the modem if it doesn't seem to be up.

modem_check_reset.py

#!/usr/bin/env python
# encoding: utf-8
"""
modem_check_reset.py - check our internet connection and reset the modem if it
doesn't seem to be up. This is for a Motorola SB5101. This is intended to be run
from a cron script every 20 min or so, thus the following would be added to the
cron jobs:
        0  * * * * /path/to/modem_check_reset.py
        20 * * * * /path/to/modem_check_reset.py
        40 * * * * /path/to/modem_check_reset.py

Created by Dave Williams on 2015-10-26, public domain
"""

import os

def ping(host):
    """Ping a host and report if connected"""
    connected = os.system("ping -c 1 " + host)==0
    print "Ping to %s returned %s"%(host, str(connected))
    return connected

if __name__=='__main__':
    if ping('yahoo.com'):
        pass
    elif ping('google.com'):
        pass
    elif ping('washington.edu'):
        pass
    else:
        print "No connections found, restarting modem"
        os.system('curl -d ResetReq=1 http://192.168.100.1/goform/RgConfig')