Documentation of the available APIs for building MQTT clients, examples of using these APIs can be found in Scripting Strategies and API Usage Examples:

• PHP
• Perl WebSphere::MQTT::Client
• IBM IA93 MQTT C Client
• Arduino Pub/Sub Client
• Delphi
• .net
• Java
• libmosquitto (C client library)
• libmosquittopp (C++ client library)
• libmosquitto-python (Python client module)
• Ruby

Many of the different MQTT implementations listed on the Software page come with their own samples.

Another good source of example code is Github - search for “MQTT” - and always respect the license.

Below are approaches to common tasks and examples using the various APIs:

• MQTT on the Android Platform
• Integrating Current Cost Meters
• Using Pachube with MQTT
• Using MQTT with Apache Ant
• MQTT and LotusScript for email automation
• 1-wire with MQTT
• Using MQTT with Twitter and Identi.ca
• Logging MQTT Messages in Databases

• Python examples

• Android
• iOS