2 days ago, my 3 plus disconnected from wifi for no reason. I did not notice it until today but I can not connect it back no matter what I try. the door bell still power up normally, it will ring when plush bottom. I tried rebooting the door bell, router, and modem. The doorbell is 10 feet away from the router. I also tried reconnect the door bell, and the whith light always flashed right. tried hard reset and then reconnect, but still nothing. I feel like I have try every possible way.