core/homeassistant/components/knx/services.yaml

send:
  description: "Send arbitrary data directly to the KNX bus."
  fields:
    address:
      description: "Group address(es) to write to."
      example: "1/1/0"
    payload:
      description: "Payload to send to the bus. Integers are treated as DPT 1/2/3 payloads. For DPTs > 6 bits send a list. Each value represents 1 octet (0-255). Pad with 0 to DPT byte length."
      example: "[0, 4]"
    type:
      description: "Optional. If set, the payload will not be sent as raw bytes, but encoded as given DPT. Knx sensor types are valid values (see https://www.home-assistant.io/integrations/sensor.knx)."
      example: "temperature"