Z-Wave_JS Fails to load

Configuration Z-Wave
1

All of a sudden, the Z-Wave_JS Intergration fails to load. It’s been working for a very long time and now it stopped. Any Ideas?
See logs below:
2025-03-31T19:37:42.024Z DRIVER █
2025-03-31T19:37:42.026Z DRIVER version 14.3.8
2025-03-31T19:37:42.026Z DRIVER
2025-03-31T19:37:51.047Z DRIVER Failed to open the serial port: Error Resource temporarily unavailable Cannot
lock port
Unable to start driver ZWaveError: Failed to open the serial port: Error Resource temporarily unavailable Cannot lock port (ZW0100)
at Driver.openSerialport (file:///usr/src/node_modules/zwave-js/src/lib/driver/Driver.ts:1526:9)
at Immediate. (file:///usr/src/node_modules/zwave-js/src/lib/driver/Driver.ts:1358:5) {
code: 100,
context: undefined,
transactionSource: undefined
}
[19:37:51] WARNING: Halt add-on
s6-rc: info: service legacy-services: stopping
s6-rc: info: service legacy-services successfully stopped
s6-rc: info: service legacy-cont-init: stopping
s6-rc: info: service legacy-cont-init successfully stopped
s6-rc: info: service fix-attrs: stopping
s6-rc: info: service fix-attrs successfully stopped
s6-rc: info: service s6rc-oneshot-runner: stopping
s6-rc: info: service s6rc-oneshot-runner successfully stopped

2

Hi, have you seen this: Z-Wave - Troubleshooting topics

3

Yes, I looked at that however it doesn’t really cover this error “Failed to open the serial port: Error Resource temporarily unavailable Cannot lock port”.

4

Have you restarted the Z-Wave integration?

5

This error usually occurs when you have both add-ons installed and they are competing to lock the serial port. You cannot run both add-ons with the same USB controller. Double check that is not the case. See official docs: Can I switch between Z-Wave JS and Z-Wave JS UI?

Also:

Guidd for switching add-ons: