KNX scene device type
New device type
Added in v1.7.0.
KNX scene device can trigger a KNX scene. The scene device is bridged to Matter as a simulated on/off plug-in unit.
Configuration
Scene Type
List of configurable attributes
Using the Scene Type you can select one of two different configurations:
Please refer to your KNX settings to select the appropriate option.
| Attribute | Value [Default] | Comment |
|---|---|---|
| Scene Type | Scene DPT type |
Scene Number (DPT 17.001)
Configuration screenshot
List of configurable attributes
| Attribute | Value [Default] | Comment |
|---|---|---|
| Scene Number Set | Group address 1-byte (DPT 17.001) - flags: C,W | Scene number set group address |
| Scene Number | 1 - 63 | Scene number to trigger |
Description of configurable attributes
If Scene Type is equal to Scene Number (DPT 17.001) you can configure the scene device type using DPT 17.001. The Scene Number Set is the group address to which we will issue a GroupWrite with a DPT 17.001 value specified in the Scene Number field.
Scene Control (DPT 18.001)
Configuration screenshot
List of configurable attributes
| Attribute | Value [Default] | Comment |
|---|---|---|
| Scene Control Set | Group address 1-byte (DPT 18.001) - flags: C,W | Scene control set group address |
| Scene Number | 1 - 63 | Scene number to trigger |
Description of configurable attributes
If the Scene Type is equal to Scene Control (DPT 18.001) you can configure the scene device type using DPT 18.001. The Scene Control Set is the group address to which we will issue a GroupWrite with a DPT 18.001 value specified in the Scene Number field with the control field set to 0 (0=Activate, 1=Learn).
Behavior in Matter apps
KNX scene is presented in Matter as an on/off plug. Turning on the corresponding on/off plug via Matter apps triggers a GroupWrite telegram to the specified group address with the specified Scene Number value. The on/off plug remains on for a maximum duration of 2 seconds, after which it turns off.
If a GroupWrite telegram is transmitted on the bus with the value equal to the Scene Number, the on/off plug will turn on for 2 seconds, after which it will turn off. If another telegram is received with a matching Scene Number value when the on/off plug is in the on position, it will turn off the plug and turn it back on again - simulating a pulse. This is done so that each matching telegram event can be received on the Matter side.
Notes
Scene Number value pitfall
As per KNX Association recommendations (KNX System Specification - Interworking - Datapoint Types) Scene Number value starts from 1 - 64, while in reality the actual transmitted value is from 0 - 63. This rule is also applied by ETS, meaning in Group Monitor mode you can see Scene Number 1 have the raw value 0x00. When programming KNX actuators, they also abide by the KNX Association recommendation so generally you don't need to worry about this small detail, except if you are looking at raw telegram in Group Monitor diagnostics.