SNMP shutdown of ReadyNAS 6.10.9 using CyberPower UPS not working

Hi Sandshark​ , using SNMP profile v1, CyberPower. Deleted the example because it had serial number etc., apologies. It was just the basic view in Power settings showing the NAS was "online" and connected to the UPS. The UPS status shows green "online" when AC power is applied, and "on battery" in yellow when I pull the plug. So the connection works fine. Since I have 4 ReadyNAS units the USB option isn't great unless I do the "USB to the first NAS, then make the other 3 NAS remote to the first NAS". Ordinarily I would have just done this and punted. But I have another NAS now, a UGreen DXP6800 Pro, whose SNMP implementation is the worst I've ever seen. The only reliable method I've found with it so far is USB. Well, there's only one USB from the CyberPower. So I need SNMP to work on the ReadyNAS. Since I couldn't rely on SNMP properly shutting down the ReadyNAS, I ended up pointing all 4 ReadyNAS at the Home Assistant NUT Server (NUT Tools add-on). From there, I'm using HA to force the NAS shutdowns when UPS battery reaches some threshold, currently 20%. It works but took some effort, because the HA core couldn't execute a shell command directly due to lack of direct access to the NUT Docker container. Had to create a loopback SSH path from HA to the Advanced Terminal add-on, and run the FSD command from that shell. PITA and without AI I never would have figured this out. I'm still perplexed why basic ReadyNAS SNMP connection to the CyberPower didn't just work to shut them down. Ironically, SNMP connection to the UGreen actually did work to shut it down, but the UGreen OS keeps broadcasting a notification that the UPS is disconnected (every 5 minutes, super annoying). The only way I've been able to get rid of that notification is by USB-connecting the UGreen to the UPS. This power stuff is so ancient, antiquated, hard to use, just ridiculous.