Low power systems lag when polling UPS

[Oliver-Bagin]

I am not exactly sure what causes this issue but the Raspberry Pi lags a lot when the UPS is not connected. I suspect that this lag is due to the low compute of the Pi causing lag when trying to find the UPS. I think that we should block the software from showing if the UPS is not detected as it isn't safe to run the test stand.

[OliverBalfour]

Seeing as I did the UPS connection logic this is probably on me. What exactly is lagging? Is the front end laggy or does the latency blow up? It's possible I set up the pi with a 0 timeout for polling UPS status when disconnected or something silly like that that starves resources iff there's no UPS connection. I don't remember this being an issue before we introduced the UPS

[Oliver-Bagin]

Not sure exactly but it seems to me the entire Pi lags. The websocket stops responding at the very least and the frontend then lags. This lasts about 5 seconds and then works for about 2 seconds before freezing again for 5 seconds.

[OliverBalfour]

What happens if you comment out

control-panel/src/server.py

Line 282 in 1226c75

asyncio.ensure_future(self.update_UPS_status())

?