I purchased 7 First Alert Z-Wave smoke detectors to replace every smoke detector in my house. I added 5 without any issue. The last 2 will not add. I followed the same steps as before and now I have 5 zwave devices listed as “Unknown Node xx Initializing (ManufacturerSpecific1)”. I have tried removing the node but it doesn’t go away. I tried readding it and I just get another Unknown Node. I do not have any new entries in known_entities.yaml. I tried restarting HA and I’ve tried removing failed nodes but nothing is working.
These were a HUGE pain to get added. The device will only send its details on the pairing process which only lasts a few seconds so most of the time all of the communication was not complete by the time the device went to sleep.