Many thanks for your quick help!
It is correct, the device does not appear in the inbox.
To the LED:
After pressing all four buttons at the same time, the LED slowly flashes green, which is also correct according to the description and indicates the management mode.
After pressing button 1, the LED lights up briefly (approx. 1 second) in red. If you double-click button 1, the LED will alternate between red and green for about 1 second.
Unfortunately, the manufacturer does not describe the exact meaning of the individual LED signals for button 1.
Here is a recording of the attempted inclusion (debug level):
2022-02-20 09:33:53.230 [DEBUG] [al.protocol.ZWaveInclusionController] - ZWave controller start inclusion
2022-02-20 09:33:53.236 [DEBUG] [ol.serialmessage.AddNodeMessageClass] - Setting controller into INCLUSION mode, highPower:true networkWide:true.
2022-02-20 09:33:53.239 [DEBUG] [nal.protocol.ZWaveTransactionManager] - NODE 255: Added 70 to queue - size 1
2022-02-20 09:33:53.242 [DEBUG] [nal.protocol.ZWaveTransactionManager] - Transaction SendNextMessage 0 out at start. Holdoff false.
2022-02-20 09:33:53.245 [DEBUG] [wave.internal.protocol.SerialMessage] - Assembled message buffer = 01 05 00 4A C1 0F 7E
2022-02-20 09:33:53.248 [DEBUG] [ing.zwave.handler.ZWaveSerialHandler] - NODE 255: Sending REQUEST Message = 01 05 00 4A C1 0F 7E
2022-02-20 09:33:53.251 [DEBUG] [ing.zwave.handler.ZWaveSerialHandler] - Message SENT
2022-02-20 09:33:53.252 [DEBUG] [WaveSerialHandler$ZWaveReceiveThread] - Receive Message = 06
2022-02-20 09:33:53.255 [DEBUG] [nal.protocol.ZWaveTransactionManager] - processReceiveMessage input 0<>128 : Message: class=null[0], type=ACK[2], dest=255, callback=0, payload=
2022-02-20 09:33:53.255 [DEBUG] [nal.protocol.ZWaveTransactionManager] - Transaction SendNextMessage started: TID 70: [WAIT_REQUEST] priority=Controller, requiresResponse=true, callback: 15
2022-02-20 09:33:53.258 [DEBUG] [nal.protocol.ZWaveTransactionManager] - Received msg (0): Message: class=null[0], type=ACK[2], dest=255, callback=0, payload=
2022-02-20 09:33:53.260 [DEBUG] [WaveSerialHandler$ZWaveReceiveThread] - Receive Message = 01 07 00 4A 0F 01 00 00 BC
2022-02-20 09:33:53.261 [DEBUG] [nal.protocol.ZWaveTransactionManager] - lastTransaction TID 70: [WAIT_REQUEST] priority=Controller, requiresResponse=true, callback: 15
2022-02-20 09:33:53.264 [DEBUG] [nal.protocol.ZWaveTransactionManager] - Received msg: ACK
2022-02-20 09:33:53.266 [DEBUG] [nal.protocol.ZWaveTransactionManager] - processReceiveMessage input 0<>128 : Message: class=AddNodeToNetwork[74], type=Request[0], dest=1, callback=15, payload=0F 01 00 00
2022-02-20 09:33:53.268 [DEBUG] [nal.protocol.ZWaveTransactionManager] - ZWaveReceiveThread queue empty
2022-02-20 09:33:53.271 [DEBUG] [nal.protocol.ZWaveTransactionManager] - Transaction SendNextMessage 1 out at start. Holdoff false.
2022-02-20 09:33:53.274 [DEBUG] [nal.protocol.ZWaveTransactionManager] - Received msg (0): Message: class=AddNodeToNetwork[74], type=Request[0], dest=1, callback=15, payload=0F 01 00 00
2022-02-20 09:33:53.276 [DEBUG] [nal.protocol.ZWaveTransactionManager] - lastTransaction TID 70: [WAIT_REQUEST] priority=Controller, requiresResponse=true, callback: 15
2022-02-20 09:33:53.279 [DEBUG] [nal.protocol.ZWaveTransactionManager] - Checking outstanding transactions: 1
2022-02-20 09:33:53.281 [DEBUG] [nal.protocol.ZWaveTransactionManager] - Last transaction: TID 70: [WAIT_REQUEST] priority=Controller, requiresResponse=true, callback: 15
2022-02-20 09:33:53.284 [DEBUG] [nal.protocol.ZWaveTransactionManager] - Checking TID 70: (Callback 15)
2022-02-20 09:33:53.286 [DEBUG] [.serialmessage.ZWaveCommandProcessor] - Callback match!
2022-02-20 09:33:53.289 [DEBUG] [nal.protocol.ZWaveTransactionManager] - Correlated to TID 70: callback 15
2022-02-20 09:33:53.291 [DEBUG] [ve.internal.protocol.ZWaveController] - Incoming Message: Message: class=AddNodeToNetwork[74], type=Request[0], dest=1, callback=15, payload=0F 01 00 00
2022-02-20 09:33:53.294 [DEBUG] [ol.serialmessage.AddNodeMessageClass] - Add Node: Learn ready.
2022-02-20 09:33:53.296 [DEBUG] [al.protocol.ZWaveInclusionController] - Inclusion event: Current state IncludeSent, new event IncludeStart
2022-02-20 09:33:53.299 [DEBUG] [e.internal.protocol.ZWaveTransaction] - TID 70: Transaction COMPLETED
2022-02-20 09:33:53.301 [DEBUG] [nal.protocol.ZWaveTransactionManager] - NODE 255: Response processed after 46ms
2022-02-20 09:33:53.304 [DEBUG] [nal.protocol.ZWaveTransactionManager] - NODE 255: TID 70: Transaction completed
2022-02-20 09:33:53.306 [DEBUG] [nal.protocol.ZWaveTransactionManager] - NODE 255: notifyTransactionResponse TID:70 DONE
2022-02-20 09:33:53.311 [DEBUG] [nal.protocol.ZWaveTransactionManager] - ZWaveReceiveThread queue empty
2022-02-20 09:33:53.313 [DEBUG] [nal.protocol.ZWaveTransactionManager] - Transaction SendNextMessage 0 out at start. Holdoff false.
2022-02-20 09:34:43.374 [DEBUG] [al.protocol.ZWaveInclusionController] - ZWave inclusion controller finalised
2022-02-20 09:34:53.213 [DEBUG] [wave.discovery.ZWaveDiscoveryService] - ZWave discovery: Stop zwave:serial_zstick:deaa7a7a45
2022-02-20 09:34:53.218 [DEBUG] [al.protocol.ZWaveInclusionController] - ZWave controller stopping inclusion at IncludeStart
2022-02-20 09:34:53.222 [DEBUG] [ol.serialmessage.AddNodeMessageClass] - Ending INCLUSION mode.
I have not yet done tracking like with Wireshark in the Z-Wave network.
Is there a description of this?