Library for driving an NRF24L01+ Radio-based Receiver. The ESPDroneTransmitter class is written for the Atmega328P MCU, tested on an Arduino Nano.
The library is developed for easily configuring and deplying an RC Transmitter object onto an Arduino board.
- Download the repository as a zip or clone it.
- Move the lib_dep.zip file out of the cloned directory.
- Extract the lib_dep.zip file. The extracted folder should contain all the dependencies.
- Open Arduino IDE and add all the libraries in the extracted folder by going to Sketch >> Include Library >> Add .ZIP library.
- It does not matter if the libraries are not in .ZIP format as long as they are folders.
- You will have to add the libraries one by one, you cannot select multiple folders.
- In the same way, add the cloned directory (ESPDroneTransmitter/) as a library.
- In the Arduino IDE, go to File >> Examples >> ESPDrone >> ESPDrone_test.
- This is the Arduino sketch to flash on an Arduino board (Arduino Nano in this example).
| Library | Author |
|---|---|
| <SPI.h> | Internal Arduino Lib |
| <RF24.h> | J. Coliz, 2011 |
- The transmitter object uses the NRF24L01+ module configured on the SPI Bus.
- Use the parametrized constructor - ESPDroneTransmitter(CE, CSN). Default configuration is ESPDroneTransmitter(7, 8).
** All dependencies are provided in the "lib_dep.zip" file.**
The list of elementary hardware is tabulated below.
| Hardware | Description |
|---|---|
| Arduino Nano/Uno | Microcontroller Board for running Transmitter Firmware |
| NRF24L01+ | 2.4 GHz Wireless Transceiver Module |
| NRF24L01+ | Nano |
|---|---|
| GND | GND |
| VCC | 3.3V |
| CE | 7 |
| CSN | 8 |
| SCK | 13 |
| MOSI | 11 |
| MISO | 12 |
On some modules, you may not have the labels printed on the PCB. Have a look at the following image for reference of the pinout. The pin with a square-shaped solder on your NRF module is the GND pin. (Shoutout to HowToMechatronics.com!)
The following image shows the Hardware that was used for testing the Transmitter Firmware.
I soldered a potentiometer on Analog Pin A6. I plan on configuring other channels for Roll, Pitch, Yaw, etc.
The ESPDroneTransmitter object is programmed to read raw digital input from a potentiometer connected to Analog Pin 6 (A6), parse the input into a char array, and transmit to the FC receiver (ESPDrone object). The raw input from the potentiometer is in the range [0, 1023].
The ESPDrone library can be found on the following Github Link: https://github.com/robokrishan/ESPDrone