Z2m disconnects from adapter when using Ser2net

[namirda]

I have been running z2m in a docker container with a Sonoff USB ZBDongle-P for a couple of years now without issues - it runs great.

I am now trying to move the adapter to a different network host and use ser2net to pass the traffic. The connection is made successfully but the adapter disconnects again after about 30 seconds. I can find no helpful information in either the ser2net log nor the z2m log. I do not believe that this is a network problem because the problem persists even if both ser2net and z2m are running on the same host.

The z2m output look like this:

Using '/app/data' as data directory
Starting Zigbee2MQTT without watchdog.
[2024-08-01 19:58:52] info: 	z2m: Logging to console, file (filename: log.log)
[2024-08-01 19:58:52] info: 	z2m: Starting Zigbee2MQTT version 1.39.0 (commit #0326926)
[2024-08-01 19:58:52] info: 	z2m: Starting zigbee-herdsman (0.50.1)
[2024-08-01 19:58:53] info: 	zh:zstack:znp: Opening TCP socket with 192.168.1.76:20108
[2024-08-01 19:58:53] info: 	zh:zstack:znp: Socket connected
[2024-08-01 19:58:54] info: 	zh:zstack:znp: Socket ready
[2024-08-01 19:58:54] info: 	zh:zstack:znp: Writing CC2530/CC2531 skip bootloader payload
[2024-08-01 19:58:55] info: 	zh:zstack:znp: Skip bootloader for CC2652/CC1352
[2024-08-01 19:58:55] info: 	z2m: zigbee-herdsman started (resumed)
[2024-08-01 19:58:55] info: 	z2m: Coordinator firmware version: '{"meta":{"maintrel":1,"majorrel":2,"minorrel":7,"product":1,"revision":20210708,"transportrev":2},"type":"zStack3x0"}'
[2024-08-01 19:58:55] info: 	z2m: Currently 0 devices are joined:
[2024-08-01 19:58:55] info: 	z2m: Zigbee: disabling joining new devices.
[2024-08-01 19:58:55] info: 	z2m: Connecting to MQTT server at mqtt://192.168.1.85
[2024-08-01 19:58:56] info: 	z2m: Connected to MQTT server
[2024-08-01 19:58:56] info: 	z2m:mqtt: MQTT publish: topic 'zigbee2mqttXXXX/bridge/state', payload '{"state":"online"}'
[2024-08-01 19:58:56] info: 	z2m: Started frontend on port 8081
[2024-08-01 19:58:56] info: 	z2m: Zigbee2MQTT started!
[2024-08-01 19:59:32] info: 	zh:zstack:znp: Port closed
[2024-08-01 19:59:32] info: 	zh:zstack:znp: closing
[2024-08-01 19:59:32] error: 	z2m: Adapter disconnected, stopping
[2024-08-01 19:59:32] info: 	z2m:mqtt: MQTT publish: topic 'zigbee2mqttXXXX/bridge/state', payload '{"state":"offline"}'
[2024-08-01 19:59:32] info: 	z2m: Disconnecting from MQTT server
[2024-08-01 19:59:32] info: 	z2m: Stopping zigbee-herdsman...
[2024-08-01 19:59:32] info: 	z2m: Stopped zigbee-herdsman
[2024-08-01 19:59:32] info: 	z2m: Stopped Zigbee2MQTT

I am using ser2net v4.3.11 and the config file looks like

connection: &con01
  accepter: tcp,20108
  connector: serialdev,/dev/ttyUSB0,115200n81,local,dtr=off,rts=off
  options:
    kickolduser: true

I have tried removing the dtr and rts options and also tried the nobreak option but to no avail.

The sonoff device is correctly mapped to ttyUSB0

Other folk seem to have no problems with ser2net and so I must be doing something wrong here.

How can I diagnose this problem - ser2net provides no log output and z2m is already set to log_level=debug.

Thanks

[markxroberts]

I have a Sonoff ZBDongle-P. It doesn't like ser2net. I have a few ConBee II adapters that are fine with ser2net. I reverted to a direct connection.