My OH3 machine doesn't recognize a New-One N4001 smart plug

I assume it is a ZWave device. In the ZWave database there is an entry for a device that matches your information: NIE Technology N4001 Mini Smart Plug

The database entry was added in January and is included in the OH 3.3 Milestone 1 release. Hence you have two ways forward:

  1. Update to OH3.3M1 or newer
  2. Use the binding snapshot for the ZWave binding from one of the milestone version of OH3.3 by placing it in the add-on-folder. Descriptions for how to do that can be found in the forum. But I will help if necessary :wink:

To double check that the database entry is valid for your device, please check for the XML file in the ZWave folder (should be something like “lib/openhab/zwave” and post it here. Or check it yourself in the database entry linked above.