====== nRF24 multi-protocol RC transmitter ======
This is a simplified build of goebish's nRF24 multi-protocol RC transmitter for OpenTX enabled transmitters with external RF support such as the FrSky Taranis.

The Arduino Nano provides a 3.3v which makes it an ideal choice with the nRF24 module. However the nRF24L01 is 5v tolerant, it is preferable to use 3.3v from the Arduino to power it.

===== Parts =====
  * 1x Ardunio Nano rev3.0
  * 1x nRF24L01 transceiver module
  * 1x 4cm x 6cm PCB prototype board
  * 1x 2.54mm female connector header row //(optional)//
  * 26 AWG wire

===== Steps =====
  - Upload the [[https://github.com/goebish/nrf24_multipro/archive/master.zip|nrf24_multipro]] sketch to the Arduino Nano.
  - Layout the Arduino Nano on the PCB prototype board (e.g. top most left).
  - Layout the nRF24L01 transceiver module on the PCB prototype board (e.g. top most right of Arduino Nano).
  - Wire up the pins for the transmitter.
    - Wire **GND** from both Arduino and nRF24L01 to **GND** pin of transmitter.
    - Wire **VIN** from Arduino to **+BAT** pin of transmitter.
    - Wire **D2** from Arduino to **PPM** pin of transmitter.
  - Wire the pins from the Arduino to the nRF24L01 transceiver module.
    - Wire **3.3V** from Arduino to nRF24L01 **VCC** pin.
    - Wire **D3** from Arduino to nRF24L01 **MOSI** pin.
    - Wire **D4** from Arduino to nRF24L01 **SCK** pin.
    - Wire **D5** from Arduino to nRF24L01 **CE** pin.
    - Wire **A0** from Arduino to nRF24L01 **MISO** pin.
    - Wire **A1** from Arduino to nRF24L01 **CSN** pin.

//TIP: For connection to the external RF pins on the transmitter, you could use a 4-pin servo cable instead of the 2.54mm pitch female headers.//
==== Pin-outs ====
^Arduino^nRF24L01^Transmitter^
|3.3v|VCC| |
|GND|GND|GND|
|VIN| |vOUT|
|D2| |PPM|
|D3|MOSI| |
|D4|SCK| |
|D5|CE| |
|A0|MISO| |
|A1|CSN| |

===== References =====
  * https://github.com/goebish/nrf24_multipro/blob/master/README.md
  * https://www.rcgroups.com/forums/showpost.php?p=34414371&postcount=3376