mosquitto: mosquitto (MQTT Broker) mosquitto: mosquitto: Eclipse Mosquitto (TM) is an open source (EPL/EDL licensed) message mosquitto: broker that implements the MQTT protocol versions 3.1 and 3.1.1. mosquitto: MQTT provides a lightweight method of carrying out messaging using a mosquitto: publish/subscribe model. This makes it suitable for "Internet of mosquitto: Things" messaging such as with low power sensors or mobile devices mosquitto: such as phones, embedded computers or microcontrollers like the mosquitto: Arduino. mosquitto: mosquitto: Mosquitto is an iot.eclipse.org project.