Create sensor from MQTT

Configuration
1

Hi all,
I am trying to create a sensor from an MQTT entity from the topic in the screenshot:

image
image768×1221 86.8 KB

I have tried the following:

sensor:
  - platform: mqtt
    name: my_grid_export_today
    state_topic: "SunGather/A200506072"
    value_template: "{{ value_json.daily_export_energy }}"
    unit_of_measurement: "kwh"

but that is just giving me an error.
Could anyone be so kind as to enlighten me with the correct syntax please?

2

See here:

Note top-level mqtt: these days. Always refer to the official documentation rather than old posts / tutorials etc. HA is a moving target :slight_smile: .

Your config (mqtt as a switch platform) was deprecated in 2022.6 and removed in 2022.12.

Also note that it’s kWh with a capital W, and if this is your first top-level use of mqtt in your config, you will need to do a full restart to load it in.

3

Thanks Troon,
I did look at the official documentation and searched through the previous posts which is how I came up with the syntax. Not sure why I wasn’t getting an error about invalid config if the syntax was completely wrong.
So are you saying that the below should work? Do I have the right state_topic? Is that the correct way to get the value using value_json (I’ve seen value.json as well)?

mqtt:
  sensor:
    - name: my_grid_export_today
      state_topic: "SunGather/A200506072"
      value_template: "{{ value_json.daily_export_energy }}"
      unit_of_measurement: "kWh"

When it’s such a moving target, I’m not sure you appreciate how difficult this is for someone who loves HA but is not a developer.

I do appreciate your help though!!

Thanks!

4

It’s been almost two years since the official documentation showed the syntax you’ve used. I’m fully aware how misleading it can be to consider old forum posts as a source of information, though.

The syntax wasn’t invalid, you’re just referencing a sensor platform that doesn’t exist. I’d imagine there will be an error in your logs about this.

Looks good to me. Try it!

5

Ahh, makes sense then. Just waiting for the sun to come up to test it out - it’s a solar generation sensor :slight_smile:
Thanks for the info.

6

Hi Troon,

Thanks for the advice - that sensor worked perfectly!

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