Mosquitto is an open source (BSD licensed) message broker that implements the MQ Telemetry Transport protocol version 3.1. MQTT provides a lightweight method of carrying out messaging using a publish/subscribe model. This makes it suitable for “machine to machine” messaging such as with low power sensors or mobile devices such as phones, embedded computers or microcontrollers like the Arduino. A good example of this is all of the work that Andy Stanford-Clark (one of the originators of MQTT) has done in home monitoring and automation with his twittering house and twittering ferry. Andy gave a talk on this at OggCamp that explains a bit about MQTT and how he uses it. The slides and audio are available online at slideshare.

Step 1 : Install apt-add-repository for add the mosquitto-dev PPA

Please see : http://learn.linksprite.com/pcduino/linux-applications/how-to-fix-error-sudo-add-apt-repository-command-not-found/

Step 2 : Add the mosquitto-dev PPA

mosquitto will be in the Ubuntu repositories so you can install as with any other package. If you are on an earlier version of Ubuntu or want a more recent version of mosquitto, add the mosquitto-dev PPA to your repositories list – see the link for details. mosquitto can then be installed from your package manager.

sudo apt-add-repository ppa:mosquitto-dev/mosquitto-ppa
sudo apt-get update
sudo apt-get install mosquitto mosquitto-clients python-mosquitto


ubuntu@ubuntu:~$ mosquitto
1403588549: mosquitto version 0.15 (build date 2013-08-23 19:24:40+0000) starting
1403588549: Opening ipv4 listen socket on port 1883.
1403588549: Error: Address already in use