That’s when trying to re add one of my two sensors, haven’t removed the other one yet. In the shelly phone app I did perform a reboot of that one sensor via software, made no difference. I then tried resetting it and re adding it to the Selly phone app. That app was able to see and re-add it but now both it and my other sensor are marked as offline, I hadn’t done anything with the other sensor. TBH I am no longer a fan of shelly battery devices, because the batteries are not that easy to find, they cost as much as the sensors themselves and the battery life when used outdoors (in s shed/garage) is less than half what is claimed. Have ordered a Frient pro door sensor for comparison, I can use rechargeable batteries in it
