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I have 6 of the temperature/humidity sensors. They have not dropped out since the initial pairing was complete. I say complete because apparently it can take 2 hours for the system to complete the pairing procedure/test.
I’ve fount that my temp. sensors were ready in about 30 minutes. Only 1 dropped off during set up. Going on 6 weeks and all are working as they should. Ordered 3 more last night.
The catchall method can take a few tries to get the data you need, but it’s pretty simple to do, Just a bit frustrating.
I also have a Button/switch and 2 Magic cubes. They’ve been on the system for a cpl weeks and all seems good.