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Eclipse Mosquitto - An open source MQTT broker
https://mosquitto.org
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Invalid protocol version 5 in CONNECT from <client-ip> #3046

Open MT22067 opened 2 months ago

MT22067 commented 2 months ago

I am receiving the following error when connecting my client to the mosquitto broker: Invalid protocol version 5 in CONNECT from

client: written oin go and implements MQTTv5

mosquitto version: 1.4.15 Platform: Ubuntu 18.04.6 LTS, 4.15.0-213-generic kernel version

Daedaluz commented 2 months ago

I don't think the broker had support of mqttv5 that early. Try go up a few versions, see if that helps.

lucapalano commented 1 month ago

Mosquitto v1.4.15 doesn't support MQTT v5. As from the first README.md lines in v1.4.15:

Mosquitto is an open source implementation of a server for version 3.1 and 3.1.1 of the MQTT protocol

The first version with with MQTT v5 support is 1.6.

Best