How to implement DIM light (ElkoEP) operated over web curl

Third party integrations
1

Hi everybody, I’m just quite a new boy in HA world. Using RasPi 3B+, Hass.io, Sonoff Tasmota. Almost everything is working. Now I’m facing a new challenge to use ELKO EP devices (https://www.elkoep.com/wireless-rf-control) which are not supported by HA yet. Is it this right thread here to ask about developing questions please?

I have several LED switches, which are controlled over LAN. Here is a sample how I can control them from HA:

- platform: command_line
      switches:
        elkoep_led_lab:
          command_on: /usr/bin/curl -X PUT http://192.168.90.10/api/devices/33633 -d'{"brightness":100}'
          command_off: /usr/bin/curl -X PUT http://192.168.90.10/api/devices/33633 -d'{"brightness":0}'
          command_state: /usr/bin/curl -X GET http://192.168.90.10/api/devices/33633/state
          value_template: '{{value_json.brightness != 0}}'
          friendly_name: "LED LAB"

Currently I’m able only turn it on and of in preset brightness. I wish to have some dim able function using brightness values. Any ideas how to implement this? Maybe from some different products?

2

Check out the documentation for template lights. If you have any further questions let us know :slightly_smiling_face:

This topic might be useful.

3

I did RTFM before my post :slight_smile:

So I tried this:

light:
  - platform: template
    lights:
      dim_lights:
        friendly_name: "DIM Light"
        level_template: "{{ sensor.theater_brightness.attributes.lux|int }}"
        value_template: "{{ sensor.theater_brightness.attributes.lux|int > 0 }}"
        turn_on:
          service: script.1561491006950
        turn_off:
          service: script.1561491077045
        set_level:
          service: script.theater_lights_level
          data_template:
            brightness: "{{ brightness }}"

and in scripts

'1561491006950':
  alias: dim_on
  sequence:
  - data:
      entity_id: switch.elkoep_led_lab
    service: switch.turn_on

'1561491077045':
  alias: dim_off
  sequence:
  - data:
      entity_id: switch.elkoep_led_lab
    service: switch.turn_off

But this is probably not good approach. Not only because it is not working :slight_smile: I wish to implement it as a new platform. I think it should be very similar as other IOT devices.

4

Now I found you also pointing into some topic - going to study this topic, thanks

5

This is partly new to me, so I don’t have a ready made example for you. We can figure it out together though. I think you’ll need shell commands instead of a command line switch. A switch only allows on & off, so no brightness setting. You’ll want to replace the command line switch with a light template.

So shell commands probably something like this:

shell_command:
  led_on: /usr/bin/curl -X PUT http://192.168.90.10/api/devices/33633 -d'{"brightness":100}'
  led_off: /usr/bin/curl -X PUT http://192.168.90.10/api/devices/33633 -d'{"brightness":0}'
  led_brightness: /usr/bin/curl -X PUT http://192.168.90.10/api/devices/33633 -d'{"brightness:"{{bri}}}'

You’ll have to try if they work for you like this. I’m not sure about the quotes and curlies.

Then a template light:

- platform: template
    lights:
      elkoep_led:
        friendly_name: "Elkoep led light"
        turn_on:
          service: shell_command.led_on
        turn_off:
          service: shell_command.led_off
        set_level:
          service: shell_command.led_brightness
          data_template:
            bri: "{{ brightness | int }}"

Edit: corrected some small typos.

6

Thank you very much Emphyrio! But I’m still not able to transfer brightness parameter.

shell_command working. But only in first two cases. Last one with parameter not. I’m trying to run it from Developer Tolls / Services and as DATA I put 100. I also tried this:


led_brightness: /usr/bin/curl -X PUT http://192.168.90.10/api/devices/33633 -d'{{bri}}'

and as data I used: {“brightness”: 100} but still no sucess.

I also tried this and this is working.


switch:
    - platform: rest
      name: "ElkoLED"
      resource: http://192.168.90.10/api/devices/33633
      method: put
      body_on: '{"brightness": 100}'
      body_off: '{"brightness": 0}'
      verify_ssl: false

But I still do not know to use brightness as a variable value.

7

I didn’t realise the shell command was a REST command :blush:

Then you can try (in configuration.yaml):

rest_command:
  led_brightness:
    url: http://192.168.90.10/api/devices/33633 -d'{"brightness:"{{bri}}}'

In your template light, the last part can be:

        set_level:
          - service: rest_command.led_brightness
            data_template:
              bri: >
                {{ (brightness /255*100) | int }}

That last calculation is for converting the default brightness scale (0-255) to a percentage scale (0-100). I’m not sure about the curlies and quotes, don’t have any experience with such a URL construct. You might need to escape some of those characters.

8

Still no sucess, this is in error log:

Error 400 on call http://192.168.90.10/api/devices/33633%20-d'%7B%22brightness:%2213%7D'

Any idea? Thanks a lot!

9

Finally after several hours of learning, testing, restarting HA I found partially working configuration.

I can turn ON / OFF and set Brightess from UI.

shell_command:
  led_on: /usr/bin/curl -X PUT http://192.168.90.10/api/devices/33633 -d'{"brightness":100}'
  led_off: /usr/bin/curl -X PUT http://192.168.90.10/api/devices/33633 -d'{"brightness":0}'
  
rest_command:
   led_brightness:
     url: http://192.168.90.10/api/devices/33633
     method: PUT
     payload: '{"brightness": {{ jas }} }'
     content_type:  'application/json; charset=utf-8'
     verify_ssl: false
     

light:
  - platform: template
    lights:
      elkoep_led:
        friendly_name: "Elkoep led light"
        # value_template: '{{value_json.brightness}}' - WHAT TO TYPE HERE?
        # level_template: "{{value_json.brightness | int }}" - WHAT TO TYPE HERE?
        turn_on:
          service: shell_command.led_on
        turn_off:
          service: shell_command.led_off
        set_level:
          - service: rest_command.led_brightness
            data_template:
              jas: >
                {{ (brightness /255*100) | int }}

I wish to also see status of light - if it is on or off and which brightness.

This is how I can read status from device as REST sensor

# Sensors
sensor:
  # RESTful senzor test
  - platform: rest
    name: JSON LAB
    json_attributes:
      - automat
      - brightness
    resource: http://192.168.90.10/api/devices/33633/state
    value_template: '{{ value_json.brightness }}'
    verify_ssl: false
  - platform: template
    sensors:
      auto:
        friendly_name: 'Automat'
        value_template: '{{ states.sensor.json_lab.attributes["automat"] }}'
      bright:
        friendly_name: 'Jas'
        value_template: '{{ states.sensor.json_lab.attributes["brightness"] }}'

But I do not know how to implement this into Light template - value and level template. I’m still little bit confusing in templates use.

Thank you

10

I create solution which is working now, but I’m not sure if this is best approach. Please check

More here How to configure Dim Light properly - looking for best approach