Hi guys,

After almost 2years of RC "sabbatical" leave I was able to finalize my DIY FrskyX receiver.
I had problems with finding a suitable RF module.I was not able to find until now.So here we start.

Today we start a new project(as title already mentioned) a DIY compatible FrSky "X" receiver (also known as D16).

To keep story short see below some characteristics.

Characteristics:

*Hardware*
- MCU STM32F103CBT6 .
- CC2500 transceiver module dual Antenna(diversity) with PA/LNA chip.

1.16 channels receiver compatible with FrskyX(D16) protocol working with Taranis all versions,Turnigy 9x pro(ersky9x) with XJT module or multi module,Devo TX(deviation firmware).
2.8 channels servo PWM(with channels selection output for 1-8 or 9-16 channels .See "Note") output.
3. SBUS 16 channels output (not inverted).
4.Full telemetry with SMARTPORT protocol telemetry(only for X protocol).
5.Antenna diversity with LED's on each antenna control line.This way is easy to debug if you have faulty antennas.
6.Analog ports 4 channels A1,A2,A3,A4.(Max 3.3V on each analog channel)
7.Programable failsafe from RX or TX(screen).
8.Power supply(5-8V)2S lipo max.
9.Range > 1Km(tested 1.5Km).


Thanks to Joao that helped me with testing this receiver he managed to get easily 1.5km range test on the ground level.
So it has plenty "punch".

Note:
This receiver features protocol/modes selection:

1) Jumper CH1-CH3 at...Continue Reading