GitHub - networkupstools/nut: The Network UPS Tools repository. UPS management protocol Informational RFC 9271 published by IETF at https://www.rfc-editor.org/info/rfc9271
Shutdown Windows computer and Synology NAS using WinNut – SeriouslyTrivial.com
Automated UPS Monitoring for vSphere with NUT and Raspberry Pi (Cheap!) - Stephen Foskett, Pack Rat