RGBW LED Control with Modbus: Seeking Assistance

General
1

Hello everyone, I’m reaching out for some guidance on controlling my RGBW LEDs using Modbus with Home Assistant. I’ve set up my LEDs with a DMX controller connected to a WAGO PLC, which interfaces with my Raspberry Pi running HA. Here’s a quick overview of my setup:

PLC Modbus

modbus:

  • name: Wago
    type: tcp
    host: 10.0.0.100
    port: 502
    switch:

Modbus Switches___

******************************

platform: modbus
scan_interval: 1
coils:
# * LED Relays *
- name: mb_wz_led_relay
hub: Wago
slave: 1
coil: 12405
sensor:

  • platform: modbus
    scan_interval: 1
    registers:

    * LED RGBW Values *

    • name: mb_wz_led_r_value
      hub: Wago
      slave: 1
      register: 13398
      register_type: holding
      data_type: uint
    • name: mb_wz_led_g_value
      hub: Wago
      slave: 1
      register: 13399
      register_type: holding
      data_type: uint
    • name: mb_wz_led_b_value
      hub: Wago
      slave: 1
      register: 13400
      register_type: holding
      data_type: uint
    • name: mb_wz_led_w_value
      hub: Wago
      slave: 1
      register: 13401
      register_type: holding
      data_type: uint
      light:
  • platform: template
    lights:
    ###_WOHNZIMMER AMBIENTE###
    light_wz_led:
    friendly_name: “Wohnzimmer Ambiente LED”
    level_template: “{{ states.sensor.mb_wz_led_w_value.state|int }}”
    value_template: “{{ is_state(‘switch.mb_wz_led_relay’, ‘on’) }}”
    color_template: “({{ states.sensor.mb_wz_led_r_value.state|int }}, {{ states.sensor.mb_wz_led_g_value.state|int }}, {{ states.mb_wz_led_b_value.state.state|int }})”
    turn_on:
    - service: switch.turn_on
    entity_id: switch.mb_wz_led_relay
    turn_off:
    - service: switch.turn_off
    entity_id: switch.mb_wz_led_relay
    set_level:
    - service: modbus.write_register
    data_template:
    hub: Wago
    unit: 1
    address: 13401
    value: “{{ brightness }}”
    set_color:
    - service: modbus.write_register
    data_template:
    hub: Wago
    unit: 1
    address: 13398
    value: “{{ h }}”
    #here I need the red value instead of the h
    - service: modbus.write_register
    data_template:
    hub: Wago
    unit: 1
    address: 13399
    value: “{{ s }}”
    #here I need the green value instead of the s
    - service: modbus.write_register
    data_template:
    hub: Wago
    unit: 1
    address: 13400
    value: “{{ s }}”
    #here I need the blue value instead of the s

So far, I’ve managed to switch the LEDs on and off, but I’m struggling to control the colors correctly. The main issue is that the template light uses HSB (hue, saturation, brightness) values, while I need to send RGB values to the Modbus registers. I found a script to convert HSB to RGB, but I’m not sure how to integrate it into my configuration. Any advice or suggestions would be greatly appreciated! Thanks in advance for your help!