Reading 1-wire thermometer data via MQTT using a topic containing an alias

[krzbor]

Currently, the MQTT topic for 1-wire thermometers includes the sensor's identifier. This becomes problematic when we use it in automation and later have to replace a damaged sensor. The new sensor will of course have a different ID, and we would need to update our automation accordingly.

I’ve prepared a patch for HeishaMon that, in addition to the existing topic, also publishes to an additional one in the format:
mqtt_topic_base/1wire_alias/[alias]
where [alias] is the alias assigned to the thermometer in the HeishaMon configuration.

With this publishing scheme, replacing a sensor only requires assigning it the same alias. It’s also worth noting the significant improvement in topic readability — instead of a hex sequence, we now have a clear, meaningful name.

Of course, my patch retains the old topic for backward compatibility.

What do you think about this solution? Would it be worth adding this functionality to HeishaMon? If you think so, I’ll submit a Pull Request with this change.