this post was submitted on 25 Jul 2026
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The HA app on your smartphone needs to refresh its exernal ip address (not your pi). It still thinks it's on mobile connection (or even is if your wifi coverage is odd) or at least in a different network than your pi running HA (vpn?).
For me, closing and re-opening the app works if I encounter that message.
Okay makes sense, it doesnt improve with closing and trying again but it does if I power down and power up the pi which is far from ideal.
I think I can reserve IPs on my router so I could ensure they are always the same.
May also be a mesh issue, I have an ISP booster and it seems to cause issues with hue bridge too.