I have the same problem. It used to work fine, but stopped sometime in June. It will only send data if I unplug it and plug it back in. It sends just once then goes to sleep and will not wakeup. I use it to control a bathroom fan. I know the logic behind that is working because if I power the H&T down and back up after having a shower, it will trigger the fan. But it no longer wakes itself up.