mosquitto: mosquitto (MQTT server) mosquitto: mosquitto: Mosquitto is an open source implementation of a server for version 3 mosquitto: of the Message Queue Telemetry Transport (MQTT) protocol. IBM have a mosquitto: closed source version of this server known as Really Small Message mosquitto: Broker (RSMB). The plan is to make mosquitto a more or less drop in mosquitto: replacement for RSMB. mosquitto: mosquitto: Mosquitto was written by Roger Light mosquitto: mosquitto: