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Control an attached GSM modem: send/receive SMS messages, handle calls, etc

Project description

GSM modem module for Python

python-gsmmodem is a module that allows easy control of a GSM modem attached to the system. It also includes a couple of useful commandline utilities for interacting with a GSM modem.

Its features include:

  • simple methods for sending SMS messages, checking signal level, etc

  • easy-to-use API for starting and responding to USSD sessions and making voice calls

  • handling incoming phone calls and received SMS messages via callback methods

  • support for SMS PDU and text mode

  • support for tracking SMS status reports

  • wraps AT command errors into Python exceptions by default

  • modular design; you easily issue your own AT commands to the modem (with error checking), or read/write directly from/to the modem if you prefer

  • comprehensive test suite

Bundled utilities:

  • GSMTerm: an easy-to-use serial terminal for communicating with an attached GSM modem. It features command completion, built-in help for many AT commands, history, context-aware prompt, etc.

  • a simple command line script to send SMS messages

  • simple utility to identify attached modem. Can also be used to provide debug information used for development of python-gsmmodem.

How to use this package

Go to examples/ directory in this repo.


  • Python 3.3 or later

  • pySerial

How to install this package

There are multiple ways to install python-gsmmodem-new package:

Automatic installation of the latest “stable” release from PyPI

pip install python-gsmmodem-new

pip will automatically download and install all dependencies, as required. You can also utilise easy_install in the same manner as using pip above.

If you are utilising python-gsmmodem-new as part of another project, add it to your install_requires section of your file and upon your project’s installation, it will be pulled in automatically.

Manual installation of the latest “stable” release from PyPI

Download a python-gsmmodem-new archive from PyPI, extract it and install the package with command:

python install

Note that python-gsmmodem-new package relies on pySerial for serial communications:

Installation of the latest commit from GitHub

Clone from GitHub:

git clone
cd python-gsmmodem/
python install

Note that python-gsmmodem-new package relies on pySerial for serial communications:

Testing the package

Build Status Coverage Status

To run all unit tests, do:

python test

Unit test code coverage information may be generated by using coverage. You can execute it directly from by doing:

python coverage

This will run all unit tests and report on code coverage statistics.

Building documentation

This package contains Sphinx-based documentation. To manually build or test the documentation locally, do the following:

git clone
cd python-gsmmodem
pip install .[doc]
cd doc
make html

For true isolation, you may wish to run the above commands within a virtualenv, which will help you manage this development installation.

License information

Copyright (C) 2013 Francois Aucamp See AUTHORS for all authors and contact information.

License: GNU Lesser General Public License, version 3 or later; see COPYING

included in this archive for details.


List all modem ports

You can simply list all ttyUSB devices before and after pluging the modem in.

ls /dev/ttyUSB*

Device or resource busy error

Check running processes. The device could be occupied by another program or another instance of gsmmodem which is still running in the background. Run sudo lsof | grep tty, try to locate the problematic process and sudo kill <PID>.

Project details

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python-gsmmodem-new-0.13.0.tar.gz (118.6 kB view hashes)

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