Turn on light on NodeMCU with a button on another ESP-01

ESPHome
1

I hope I am just over-thinking this…

Have a NodeMCU with 4 MOSFET modules attached. The “lights” all show up in HA and I can turn them on and off in HA.

output:
  - platform: esp8266_pwm
    pin: 5
    frequency: 100 Hz
    id: m1dim1

  - platform: esp8266_pwm
    pin: 4
    frequency: 100 Hz
    id: m1dim2

  - platform: esp8266_pwm
    pin: 14
    frequency: 100 Hz
    id: m1dim3

  - platform: esp8266_pwm
    pin: 12
    frequency: 100 Hz
    id: m1dim4

    
light:
  - platform: monochromatic
    output: m1dim1
    name: "Module 1 Dimmer 1"
    id: m1dim1x

  - platform: monochromatic
    output: m1dim2
    name: "Module 1 Dimmer 2"
    id: m1dim2x

  - platform: monochromatic
    output: m1dim3
    name: "Module 1 Dimmer 3"
    id: m1dim3x

  - platform: monochromatic
    output: m1dim4
    name: "Module 1 Dimmer 4"
    id: m1dim4x

On a separate ESP-01 I have a single push-button that I want to press to turn on one of the “lights” on the NodeMCU.

binary_sensor:
  - platform: gpio
    pin:
      number: GPIO0
      inverted: True
      mode: INPUT_PULLUP
    id: switch1x
    name: "Switch1x"
    on_press:
      then:
        - light.toggle: m1dim1x

I get the following error on this code:
"Couldn’t find ID ‘m1dim1x’. Please check you have defined an ID with that name in your configuration.

What am I missing? Why can’t the ESP-01 code reference the ID of the light on the NodeMCU?

2

Because the reference is local.

Ideally use an automation in homeassistant

trigger:
  platform: state
  entity_id: YOUR_BUTTON
action:
  service: light.toggle
  entity_id: YOUR_LIGHT
1 Like
3

As far as I know, you cant do operations between different esphome devices directly. Either register a service to be called from home assistant inside the light node and execute this service on the esp01 or you have to use an automation in home assistant.

4

Well AFAIK you can set up the web server on the esp to be controlled, which creates a REST interface, then use the http request component on the controlling esp.

5

Hi Marc,

I used the idea of using an automation and it certainly worked. Oddly I had to restart my HA service for the automation to work (seems odd).

- id: '1607866854330'
  alias: Toggle m1dim1x
  description: ''
  trigger:
  - platform: state
    entity_id: binary_sensor.switch1x
    to: 'on'
  condition: []
  action:
  - type: toggle
    device_id: 66ecf16246c8a5f733e9c6e6d7947338
    entity_id: light.module_1_dimmer_1
    domain: light
  mode: single

I am looking to make this button have additional functionality. (Haven’t tried yet, just wanted to respond that your suggestion was helpful)

Single press - Toggles light on/off
Press and hold - dims light from current set point down to off. (like the set_relative function works)

It’s probably obvious that I am very new to HA/ESPHome. I really appreciate the help.

1 Like
6

I’m really new to HA/ESPHome. Can you point me to an example of registering a service in a node? I looked through the docs and found some info, but I don’t think I’m searching for the correct terms.

7

I looked at doing that but the web server service uses a lot of memory. I had low memory issues on the ESP-01 and OTA updating when I first started using ESPHome. Removing the web server function resolved that.

I’m sure that I could do that on the NodeMCU’s, but I’d like to have the same solution for every device.

Thanks for the input!

8

In the situation you described you don’t need to run web server on the esp-01.

9

Heres an example how to do it, i use it to have service calls instead of switches for my amplifier, which gets controlled through IR, which behave strangely.

api:
  password: 'hereGoesYourAdvertLol'
  services:
    - service: vol_up
      then:
        - remote_transmitter.transmit_nec:
           address: 0x1D00
           command: 0xD926
    - service: vol_down
      then:
        - remote_transmitter.transmit_nec:
            address: 0x1D00
            command: 0x59A6

after the then: line there goes your actions that you want to execute. Theres even a possibility to make use of service data like a disired color for an rgb light, a fade out time and so on.

2 Likes
10

Boom! Thank you!

That makes total sense now. I added this to my node with the light:

api:
  services:
    - service: m1dim1_on
      then:
        - light.toggle: m1dim1x

And this to my node with my button.

    on_press:
      then:
        - homeassistant.service:
            service: esphome.nodemcu03_m1dim1_on

Makes sooooo much sense now.

Thanks again for the guidance!

DW