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 21-40 of 866 topics
Need feedback for a new MQTT app Marina Serozhenko 5/22/17
ENOMEM out of memory error while publishing with Client Sandra Undweiter 5/19/17
Subscribing to more than one topic Mickey 5/17/17
MQTT Relay Prosenjit Pal 5/14/17
Mosquitto increasing maximum connection limit Jiji K 5/13/17
Connecting AWS iot using paho.mqtt.golang Eran Lavi 5/13/17
Workflow in case of Clean Session set to 0 5/8/17
NOOB MQTT Questions Dan Hoover 5/3/17
MQTT Client won't publish over internet. Birdbrainuk 5/2/17
How to resolve org.eclipse.paho.client.mqttv3.internal.ClientState.checkForActivity issue of client? tushar patil 5/1/17
mosquitto and ram log files tmpfs on a raspberry alex jennings 4/29/17
Maximum number of connections supported by mosquitto broker kushal bhatta 4/27/17
Is using WiFiClientSecure alone with a MQTTS server enable encyption Balasundram Arunn 4/25/17
Introducing video over MQTT using the MediaSource API Dave Schere 4/24/17
What is the difference between the topic name being used on publishing/subscribing and 'will topic'? sujitha 4/24/17
Mqtt C client authentication Daniele Carvalho 4/24/17
mycustom library and pubsubclient call back Waqas Ahmed 4/19/17
mosquitto_sub: how to find out to which topic a messages belong to Grossmann200 4/15/17
Mosquitto MQTT publish hexadecimal message ? Martinez Benjamin 4/14/17
Mqtt broker mosquitto supports zigbee? 맥주치킨 4/10/17
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