Motion controller II : Matter --> Zigbee and use Smar controller II

Bart — Mon, 02 Nov 2026 10:30:22 GMT

I am trying to connect a Bosch Motion Detector II [+M] (BSEN-M2D) to a Bosch Smart Home Controller II. The sensor previously worked correctly via Matter/Thread in Home Assistant and has since been removed from Home Assistant.

After performing a factory reset, the status LED first lights up green and then starts flashing blue. In the Bosch Smart Home app, I scan the QR code and start the pairing process, but eventually receive the message: “Device not found / Check Zigbee key.”

When I follow the instructions in the app and press and hold the control button on top of the motion detector for at least 5 seconds, the status LED does not start flashing orange. Only the white orientation light at the bottom remains illuminated while the button is pressed. As soon as I release the button, the white light turns off and the status LED briefly lights up red.

The Zigbee EUI-64 and Install Code are printed on the sensor label.

Could you please advise how I can correctly switch the BSEN-M2D from Matter/Thread mode to Zigbee mode and pair it with the Bosch Smart Home Controller II?

Betreff: Motion controller II : Matter --> Zigbee and use Smar controller II

M_Rapske — Mon, 02 Nov 2026 12:12:25 GMT

Hey @Bart . It sounds to me like the factory reset didn't work properly. During the pairing process, the Bosch app switches the motion sensor from Thread to ZigBee.

Betreff: Motion controller II : Matter --> Zigbee and use Smar controller II

Geomo — Mon, 02 Nov 2026 12:43:46 GMT

@Bart please follow the steps from the video: Reset

Thema "Betreff: Motion controller II : Matter --> Zigbee and use Smar controller II" in Technische Probleme

Motion controller II : Matter --> Zigbee and use Smar controller II

Betreff: Motion controller II : Matter --> Zigbee and use Smar controller II

Betreff: Motion controller II : Matter --> Zigbee and use Smar controller II