The "things" that don't work are roughly 30 feet from the hub. For some reason they become unavailable from time to time and stay that way for up to a week. Du

The "things" that don't work are roughly 30 feet from the hub. For some reason they become unavailable from time to time and stay that way for up to a week. During that time they don't function properly and it's not clear what to do to get them working again. I've read that some people can get them working by resetting and re-installing each "thing" but that must be done each time it happens, which is really not practical.