MQTT messages not getting through from network computer

[FloatingBoater (James Derrick)]

Hi,

• The MQTT protocol connects over TCP/IP, and uses IPv4 / IPv6 / DNS / mDNS.

• HA MQTT discovery is specific to the MQTT protocol. It is completely unrelated to DNS.

They are very different and operate at completely different layers.

Get the IPv4 address of your HA machine which has the MQTT broker running on it, and use that to connect to the MQTT broker. Use the HA Settings → System → Network, or try pinging HA (ping homeassistant.local or similar to get the address).

Here’s an example that works with the IPv4 loopback address from the HA console itself locally:

PSA: MQTT Name changes in 2023.8

Note to developers - Whilst you’re re-factoring your MQTT Discovery code, can I suggest adding additional values to improve how users can interact with your hardware? Here’s an example from my own test code (with some light changes) which adds: The example Device is configured with optional extra information such as manufacturer, version, and the ‘suggested_location’ which can be used to set the Area. The example Entity adds optional extra values such as an icon, the device class and unit of …

Install MQTT Explorer and get it connected to your HA broker.

Here’s a step by step explanation of setting up MQTT on HA which I usually trot out…

Sonoff Tasmota fails to connect to MQTT

Hi, I’d start with a clean slate - re-flash the device (or Tasmota → Configuration → Reset Device), and delete the Mosquitto Add-on and reinstall. HASS Mosquitto broker Add-In, MQTT integration, Tasmota Integration Mosquitto broker Add-In The recommended way to configure uses is shown on the Add-On Documentation tab - e.g. create a HASS user. http://homeassistant.local:8123/hassio/addon/core_mosquitto/documentation I personally use additional Mosquitto users, BUT these are configured not b…

If this helps, this post!