MQTT Proxy to modify topics

[glyn.hudson]

@JustPlaying

nstead of NodeRed - what are your thoughts @glyn.hudson Glyn on a ‘Modifying MQTT Proxy’ - as light-weight way to get Shelly data to emon (ie avoiding the need for NodeRed altogether: so could be light enough code to run on emonPi hardware. And seems more efficient than EmonPi duplicating the MQTT data for the shelly data twice: once pre and once post-NR ?

That looks like a great option, I’m not familiar with MQTT proxy. Any idea what template would be required to convert:

topic: shelly/status/temperature:0 payload: {"id":0, "tC":23.1, "tF":73.6}

to

topic: emon/shelly/indoor payload: 23.1

There doesn’t seem to be much documentation on how the template transformations work.

@djh

I just noticed this device (i.e. Shelly Plus H&T) because of this thread, but when I read the reviews on Amazon the first few very uniformly are bad because of unreliable readings. Can anybody who has one confirm or deny these reviews?

It seems to work fine to me. I think the display issues have been fixed with FW update. I’m only really bothered about temperature readings. Humidity measurements are not usually as accurate as temperature.