ESP is not connected to turn off the safety relay

ESPHome
1

Hello,
I would like to use esp8266 (esp01) for temperature control with esphome via homeassistant. I already have such a solution, but I would need to upgrade (improve) it. I have to heat up to max 28C with homeassistant climate. what I would need to solve: if the temperature value rises above a certain degree (e.g. 30 C) and the esp8266 does not have a wifi connection at that time (that is, it cannot communicate with homeassistant), then I would need to immediately turn off the relay in an emergency.
How could I program it?

I currently use the simplest version:

sensor:

  • platform: dallas
    id: “heater_temp”
    address: 0x1XXXXXXXXXXXXXX8
    name: “heater_temp”

switch:

  • platform: gpio
    id: heater_relay1
    name: “Heater indoor”
    pin: 0
    inverted: True
    restore_mode: RESTORE_DEFAULT_OFF

Sorry for my bad english.

2

You can add an automation to Dallas using on_value or on_value_range to check if the temperature is above 30

and also check the wifi connection.connected

3

Or do the whole automation on Esphome, so it takes care of your heating even if wifi or home assistant goes down.

4

Hello,

Am I right that if I use on_value_range, the relay will turn off above 30C and turn on below 5C? Will I be able to handle the values ​​between the two in homeassistant (for example, between 7C and 28C)?

Something like this:

sensor:

  • platform: dallas
    id: “heater_temp”
    address: 0x1XXXXXXXXXXXXXX8
    name: “heater_temp”
    on_value_range:
    • above: 30
      then:
      • switch.turn_off: heater_relay1
    • below: 5
      then:
      • switch.turn_on: heater_relay1

switch:

  • platform: gpio
    id: heater_relay1
    name: “Heater indoor”
    pin: 0
    inverted: True
    restore_mode: RESTORE_DEFAULT_OFF
5

As others mentioned, for this kind of scenario it usually makes sense to do it all on the ESP device. There are a couple climate options with ESPHome depending on what you’re trying to do, but here’s probably the most basic/common:

6

Yes. Between 7 and 28 you can still handle in HA.

Actually between 5 and 30.
Because the logic is below 5 and above 30, then the esphome will control when it reaches 4 or 31.

7

Please format your code correctly. It will help others identify any issues with spaces (very important in yaml) as well as making your code easier to read.