Welcome to the MQTT mailing list and discussion group.

MQTT is a lightweight publish/subscribe messaging protocol originally developed for sensor applications. MQTT is extremely useful and widely adopted in mobile environments due to the low power consumption, simplicity of API, and small bandwidth used. Clients and servers are available in various languages including C, Python, Erlang, C#, Java etc - see for more information about the protocol and the community around it.

This group is intended to bring together discussions of the protocol and different implementations. Other discussion media exist (for example, individual software implementations may have their own project resources) but this group is for discussion of the protocol and MQTT ecosystem as a whole. Off-topic debates, discussion around alternative protocols, etc. do not belong in this group. Thanks.

Initial posts will need to be moderated by a group administrator before they appear to the community.

Showing 1-20 of 656 topics
Denied publish error Edwin Vinas 4:54 PM
acknowledgement - qos = 1 between python and node-red Chris Jefferies 3:17 PM
How dose MQTT process the duplicated message when retransmitted. Shafreeck Sea 5/29/16
Problem with cast jmajyo 5/29/16
MQTT/TLS AWS IoT implementation in Atmel WINC1500 + SAMD21 Development Board Jon M. 5/27/16
Mosquitto broker sending message to Azure IoT Hub Mario Barbato 5/19/16
project MQTT PHP Luc Soriano 5/14/16
LWT kaushalender shekhawat 5/11/16
MQTT Dashboard recommendations banjaxed 5/6/16
Two concurrent paho C client programs on the same RPi connecting to local Mosquitto Broker... Pihlung Pang 5/4/16
MQTT-S(N) brokers Filipe Nicoli 5/3/16
regarding websockets in Mosquitto Suman Patro 5/1/16
TLS/SSL certificates generation for broker and client and what config required in mosquitto.conf Shrikant Lahase 4/27/16
setting up a basic mqtt broker on aws ec2 andrew stillie 4/23/16
Problem with publish MQTT message via Telit GSM Norbert Towiański 4/21/16
Test equipment kaushalender shekhawat 4/13/16
How on_connect() called in example temperature_conversion.cpp Ahmed Rafiq 4/10/16
Topic error handling Nicolas Jouanin 4/10/16
MqGnatt Dominik Obermaier 4/8/16
to listen to multiple ports in a single thread Suman Patro 4/2/16
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