How can two ESP's communicate with eachother

ESPHome
1

First at all, sorry but i couldn’t find this on ESPHome website, or this forum. Also i know this is a really nobish question. Basicly, i have two esp’s, one is light switch:

switch:
  - platform: gpio
    name: "Relay"
    pin: 0
    id: Light1

And it works, i can controll it from HA, and also i want to controll it from the other esp (i want to make a light switch with a button), and here is the code for it:

binary_sensor:
  - platform: gpio
    name: "LightSwitch"
    pin: 0
    on_click:
      min_length: 50ms
      max_length: 350ms
      then:
        - switch.toggle: Light1

What i struggle with, is the last line of the second script:

- switch.toggle: Light1

When i type this, it tells me that there is no ID like that. How do i reference the switch ID of another esp?

2

in esphome, you can’t. you can transmit via home assistant though.

3

And how can i do that?

4

Write a home assistant automation.

5

One esp would have a binary sensor on it and the other a switch.
You’d then make an automation for one to trigger the other.

6

You can also use MQTT, but you still need a broker so in that case it needs the same number of devices to implement as using HA automations.

7

IMO it’s simple to do it with home automation and binary sensor, like samnewman86 said, TBH I’m ashamend i didn’t think of that. But will explore MQTT soon, thanks!