Home Assistant Show and Tell

Hi can anyone help please? I set up home assistant with phoscon & aqara sensors following Matt’s excellent guide. Been working great for two years but now can’t connect. ERR_CONNECTION_REFUSED.
Limit of my understanding is to reboot non router, turn off/on pi, but that doesn’t work!
Any (simple) suggestions appreciated. Ta

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I had this a while ago - updated all the OS / Software and rebooted and then had to remove and then re add the sensors to Phoscon and that fixed it - I think it is “just one of those things…”
Matt’s guide is excellent mind - kept me busy in lockdown!

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Thanks, I guess that’s like starting again from scratch? Will all the data gathered so far be lost? Matt’s guide is so good that I don’t really have a clue as to what is really happening in the background!

As long as you use the same names for all the sensors/groups it should be fine.

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Reviving this topic now that a new version of the HEMS / Home Assistant has been deployed