Group Monitor

The Group Monitor is a live diagnostic tool built into the Web Interface. It displays KNX bus telegrams in real time, letting you verify that group addresses are communicating correctly.

Opening the Group Monitor

In the Web Interface sidebar, click Group Monitor.

Using the Group Monitor

Click Start to begin capturing KNX telegrams. As devices send or receive values on the KNX bus, each telegram appears as a new row in the table.

Each row shows:

Column	Description
Timestamp	When the telegram was received
Source address	The KNX physical address of the sending device
Destination address	The group address the telegram was sent to
Value	The decoded value

Click Clear to empty the log without stopping the capture.

Common Use Cases

Verifying a group address: Trigger a KNX device (e.g. press a button or switch a light) and watch for the corresponding telegram in the monitor. Confirm the destination group address matches what you configured in the Accessory Manager.

Debugging missing updates: If a device in your smart home app isn't reacting, use the Group Monitor to check whether the KNX device is actually sending telegrams. If no telegram appears, the issue is on the KNX side (wiring, programming, or device configuration).

TIP

Use the Group Monitor alongside ETS's built-in group monitor for a complete view of your installation. The KNX Bridge monitor shows only telegrams that pass through the bridge.