nRF24L01 multi-protocol RC transmitter

Create a model in OpenTX using external module in PPM mode, 12 channels and TAER sequence order.

#####Protocol is selected with stick position at startup:

Elevator down + Aileron left = Syma X5C-1/X11/X11C/X12
Elevator down + Aileron right = Attop YD-822/YD-829/YD-829C ...
Elevator up + Aileron right = EAchine H8 mini, BayangToys X6/X7/X9, JJRC JJ850 ...
Elevator up + Aileron left = EAchine H7
Elevator up = WLToys V202/252/272, JXD 385/388, JJRC H6C, Yizhan Tarantula X6 ...
Elevator down = EAchine CG023/CG031/3D X4
Aileron left = Cheerson CX-10 green pcb
Aileron right = Cheerson CX-10 blue pcb & newer red pcb, CX-10A, CX11, CX12

Last used protocol is automatically selected if stick is in neutral position.

#####Extra features (if available on aircraft):

Channel 5: led light (or 3 pos. rate on CX-10, H7)
Channel 6: flip control
Channel 7: still camera
Channel 8: video camera
Channel 9: headless
Channel 10: calibrate Y (V2x2), pitch trim (H7), RTH (H8 mini)
Channel 11: calibrate X (V2x2), roll trim (H7)
Channel 12: Reset / Rebind