Here is the code for a standard 10 channel PPM RC tx+rx for my boards. You must use my modified version of the RF22 library!
On the TX you need to connect 5V PPM to header D3. You can put a switch or jumper on the header next to the RF22 (GPIO2) to switch between low power (1dBm, 1.3mW) and high power (20dBm, 100mW, red LED on). You can easily change the frequency in the code (remember to change rx as well!).
On the RX the LEDs indicate RSSI values: Green > -70dBm, Green+Red > -85dBm, Red > -100dBm, else/no signal = no LED.
Be careful not to connect servos the wrong way around. I didn't use current limiting resistors on the arduino pins to save having to solder 10 more SMD resistors, so it is possible to damage the output pins if they somehow get stuck on and end up powering your servo!
rf22_RC_TXRX.zip (4.08 KB)