Simple way to control the dingz LED from Home Assistant – https://www.dingz.ch/

dingz.yaml

# in configuration.yaml
rest_command:
  dingz_led:
    url: http://DINGZ_IP/api/v1/led/set
    method: POST
    payload: 'action={{ action }}&color={{ color }}&mode=rgb'
    content_type: 'application/x-www-form-urlencoded; charset=utf-8'
    
# use it as service
- service: rest_command.dingz_led
  data:
    action: "on|off|toggle"
    color: "FFFFFF"