How to detect if my sensor is down

Configuration
1

I like to test when my smartmeter sensor is down. I have a P1 smartmeter module that send every 10 sec the values with mqtt to home assistant.

That is working fine.

Now I like to send a whatsapp if my smartmeter is down for 2 minutes. This 2 minutes is just for example.
If my smartmeter module is out ( not sending any information ) then the last sent value stay the same.
So if the value is not changing for 2 minutes then I like to send a whatsapp.

Sending a whatsapp is not the problem, I don’t kow how to test if the sensor is down.

I don’t know where to start to make that automation, can somebody point me the right direction.

2

Hi, does it happen that the sensor is failing?

If so, how is it communicating (connection) to your system/network and is it not registering any data of not sending?

1 Like
3 
trigger:
  - platform: state
    entity_id: sensor.your_sensor
    for: "00:02:00"

This should be your trigger in the automation.
If the state of the sensor is not changed for 2 minutes (for example) then…

4

thanks, I will try this trigger. It works.