Novatel Wireless MIFI 4620 modem - auto reconnection

The script makes internet connection with your modem more reliable and stable. In case of connection problem it sends reconnecting command to reset the upstream link.

The script is tested on Novatel Wireless MIFI 4620LE modem (datasheet). The admin panel in my case looks like this:

Prerequisites

Novatel Wireless MIFI 4620 modem (with Verizon admin panel).
PC with Linux OS in the same network with modem.

How it works

First of all script checks the link to modem with wget command. If it's OK, tries to connect with wget to the specified external web resource to check internet connection.

If it's OK - just exit, else - execute PHP script which communicates with modem API and makes modem reconnecting.

All actions are logged to stdout.

Dependencies

The script uses shell wget and PHP, so install all required dependency packages.

for deb-package management Linux (Debian-based):

sudo apt-get install git wget php php5-curl

for rpm-package management Linux (RedHat-based):

sudo yum install git wget php php5-curl

Installation

Manual usage

To use the script manually follow next steps.

Clone the repository:

git clone https://github.com/rpanchyk/novatel-wireless-reconnect.git

Move to the project directory:

cd novatel-wireless-reconnect

Run the command:

./inet_reconnect.sh "CHECK_ADDRESS" "MODEM_ADDRESS" "MODEM_PASSWORD"

where:

CHECK_ADDRESS - the URL to external web resource, for ex: https://google.com
MODEM_ADDRESS - the URL to modem admin panel, for ex: http://192.168.1.1
MODEM_PASSWORD - modem admin panel password

Automatic execution

To use the script in automatic mode perform actions described below.

Clone the repository:

sudo git clone https://github.com/rpanchyk/novatel-wireless-reconnect.git /opt/nwr

Add entry to the /etc/crontab file:

*/5 * * * * root /opt/nwr/inet_reconnect.sh "https://google.com" "http://192.168.1.1" "password" >> /var/log/inet_reconnect.log

Actually, it's not desired to be a root to execute the script, so change in your own.

Apply the cron changes:

sudo service cron reload

Contributing

You can change this script according to your modem device. This is just the idea to solve connection drops.

Report bugs, request features, and suggest improvements on Github.

Or better yet, open a pull request with the changes you'd like to see.

rpanchyk / novatel-wireless-reconnect