Struttura del byte DPT 18.001

Byte:  bit7   bit6  bit5  bit4  bit3  bit2  bit1  bit0
       L/R    0     S5    S4    S3    S2    S1    S0

  bit7 = 0: RECALL scene (actuator plays back stored values)
  bit7 = 1: LEARN  scene (actuator stores current state)
  bits 0–5: scene number (0 = scene 1, 1 = scene 2 ... 63 = scene 64)

Common byte values:
  0x00 (0)   → Recall scene 1
  0x01 (1)   → Recall scene 2
  0x04 (4)   → Recall scene 5
  0x07 (7)   → Recall scene 8
  0x80 (128) → Learn scene 1  (store current state as scene 1)
  0x81 (129) → Learn scene 2
  0x87 (135) → Learn scene 8

Struttura dell'indirizzo di gruppo della scena – esempio residenziale

GA 4/0/0  Living room scenes  (DPT 18.001)
  Members: DIM ch1 (main lights), DIM ch2 (mood), JAL ch1 (blind east),
           JAL ch2 (blind west), AKD ch3 (floor lamp)

GA 4/0/1  Bedroom scenes     (DPT 18.001)
  Members: DIM ch3 (ceiling), DIM ch4 (bedside L), DIM ch5 (bedside R),
           JAL ch3 (blackout blind), HVAC setpoint (thermostat)

GA 4/0/2  Kitchen scenes     (DPT 18.001)
  Members: DIM ch6 (work surface), DIM ch7 (island), AKD ch7 (extractor)

GA 4/0/10 Whole-house scenes (DPT 18.001)
  Members: all rooms simultaneously
  Use: Away scene 6 → all rooms switch to away state in one telegram

Procedura della modalità apprendimento – pulsante MDT

User workflow: reprogramming Dinner scene (scene 4):

  1. Manually set all devices to desired state:
     → dim living room to 55% via dimmer rocker
     → close blinds to 75% via blind button
     → HVAC stays at current setpoint

  2. Hold the "scene 4" button for 5 seconds
     → KNX binary input enters learn mode
     → sends DPT 18.001 learn telegram: byte value 0x83 (131)
        (bit7 = 1 = LEARN, bits 0–5 = 0x03 = scene 4)

  3. All actuators subscribed to GA 4/0/0 receive the learn telegram:
     → DIM actuator stores current brightness (55%) as scene 4
     → JAL actuator stores current position (75%) and slat as scene 4

  4. Future Dinner recall:
     → short press button 4
     → byte 0x03 (recall scene 4) → all actuators recall stored values

Scena serale per tutta la casa – tutti gli attuatori su GA 4/0/10

Trigger: entrance keypad → GA 4/0/10 = 0x01 (recall scene 2 = Evening)

Device responses (all simultaneous, within 100ms):
  Living room DIM:    40% brightness (warm white 2700K if tunable)
  Kitchen DIM:        60% brightness
  Hallway DIM:        50% brightness
  Bedroom DIM:        20% brightness
  All JAL blinds:     position 80% (mostly closed)
  Living room HVAC:   setpoint 21.0 °C
  Bedroom HVAC:       setpoint 20.0 °C
  Entrance AKD:       floor lamp ON

Result: arriving home after dark → press one button on entrance keypad
        → entire house in "Evening" state
        → no individual device adjustments required

Home Assistant – richiamo scena KNX (YAML)

# configuration.yaml — KNX scene trigger

automation:
  - alias: "Voice: Dinner scene"
    trigger:
      - platform: conversation
        command: "Dinner time"
    action:
      - service: knx.send
        data:
          address: "4/0/0"    ← living room scenes GA
          payload: 3          ← DPT 18.001 value: recall scene 4 (Dinner)
          type: "scene"       ← HA KNX integration handles DPT 18.001

  - alias: "Security arm → Away scene"
    trigger:
      - platform: state
        entity_id: alarm_control_panel.home
        to: "armed_away"
    action:
      - service: knx.send
        data:
          address: "4/0/10"   ← whole-house scenes GA
          payload: 5          ← recall scene 6 (Away)
          type: "scene"

  - alias: "Sonos play → Cinema scene"
    trigger:
      - platform: state
        entity_id: media_player.living_room
        to: "playing"
        attribute_match:
          media_content_type: "video"
    action:
      - service: knx.send
        data:
          address: "4/0/0"
          payload: 2          ← recall scene 3 (Cinema)
          type: "scene"