How to get an alert, if a sleeping ESP doesn't wake up?

ESPHome
1

Hi,
I would like to provide a sensor to home assistant, when to expect the next update of my ESP device before I put it to deep sleep. Idea is, that I can raise an alert in HA, when an ESP device is offline longer than expected…

I thought about something like a sensor value where I add the info about the “run duration”, the “deep sleep duration” configured in esphome and the current time. But I am struggling to parse the different options to define time intervals and do calculation.

Any thoughts about implementing something similar? Thanks!

2

These things always make me curious. What could that esp be reporting that is important enough to create a “check in” sensor in HA? Will it toggle the Panic mode switch if no temperature and humidity data come in every 6 hours?

3

I do have a drainage with a pump (not smart, just a simple swimm switch). During this winter period, the pump stopped working and the water flooded into the basement… As (one of two) alarm devices I added an ultrasonic sensor to measure the level. I want to get an alert on my phone via HA, when the level raises to a certain level or the device is offline longer than expected…

(The second alerting device is dumb and will just trigger a siren)

4

Using the status entity and some home assistant magic, I was able to generate an alarm:

alias: drainage sensor health check
description: Trigger an alert, if drainage sensor is offline longer than expeted
trigger:
  - platform: state
    entity_id:
      - binary_sensor.drainage_drainage_water_sensor_status
    from: "on"
    for:
      hours: 0
      minutes: 15
      seconds: 0
condition: []
action:
  - service: notify.persistent_notification
    metadata: {}
    data:
      title: ALERT - CHECK DRAINAGE!
      message: Check the drainage sensor, it's offline longer than expected!
mode: single

The esp is sleeping for 10 minutes and then running for est. 1min. Haven’t found a way to transfer these to values from the esp to HA. But I don’t expect many changes :wink: