Im running the latest APP and RC Firmware (APP 3.0.1 and RC 1.8.0 - Samsung TAB S2) on my P4. Ever since I updated I have been getting the 'Disconnected' message. The P4 and Controller is connected, gimbal and everything works but NO Video Display in the APP. A real PITA. Just sometimes it will connect and everything is AOK but the first message I see is 'Transmission Signal Weak' (In RED), which stays up for a few seconds. I have found that if I move the Controller as close as possible to the P4 (touching) - the initial P4-RC-APP boots-up perfect every time. If I try and Boot with the RC moved away from the P4 - I get the 'Disconnected' message. It looks to me like the initial Boot sequence is producing a very low signal that the APP/Controller can not detect and the Video is not connecting? Just a Guess.