Ensure that automations revert to their last state after a restart

[WrathPony]

Describe the feature

Every time Home Assistant restarts, automations stop completely. When there is a scheduled trigger, this can cause problems such as a module failing to stop at the desired time, etc.
It would be useful if automations could resume from their last state following a restart

Use cases

I set my water heaters to start heating at 10 pm and stop at 6 am. If Home Assistant restarts or there is a power cut, the automation stops completely and my water heaters do not switch off at 6 am

Current workarounds

No response

Anything else?

No response

[TheFes]

How did you set up your automation? Do you trigger at 10pm, and then you let the automation wait until 6am using a delay?
A better way of doing this would be to use 2 triggers. And if you also want to to prevent missing a trigger because you did a restart (or if there was a power outage) at exactly 10 pm or 6 am, you can add a third trigger on the home assistant start event

Example:

triggers:
  - alias: Trigger when the water heater should turn on or off based on time
    trigger: time
    at:
      - "06:00"
      - "22:00"
  - alias: Trigger when Home Assistant starts
    trigger: homeassistant
    event: start
actions:
  - alias: Check which action is required
    if:
      - alias: Time block the water heater should be on
        condition: time
        after: "22:00"
        before: "06:00"
    then:
      - alias: Turn the water heater on
        action: switch.turn_on
        target:
          entity_id: switch.water_heater
    else:
      - alias: Turn the water heater off
        action: switch.turn_off
        target:
          entity_id: switch.water_heater

[nielsrowinbik]

@TheFes has provided a great example of how to set up your automations to be more resilient, however it is absolutely a known issue that some elements of automations just do not survive restarts or reloads. It's a need I'd like to track in one place: #3791. Feel free to add your support and other examples, if you have any, there. Thanks!