Interfacing nRF24L01 with Arduino: Controlling Servo Motor

This wireless control system operates by establishing a bidirectional radio frequency link between two separate microcontroller setups, functioning as a transmitter and a receiver. On the transmitting side, an analog input device—specifically a potentiometer—is connected to an analog-to-digital converter pin on an Arduino board. As the user adjusts the physical position of the potentiometer, the microcontroller reads a fluctuating voltage level and translates it into a corresponding digital value. This data packet is then formatted for wireless transmission and handed off to an nRF24L01 transceiver module via the Serial Peripheral Interface (SPI) protocol. The nRF24L01 uses radio waves to broadcast the packet through the 2.4GHz spectrum. On the receiving side, a second nRF24L01 module captures the incoming radio signal and passes the data payload over SPI to the receiving Arduino board. The receiver interprets the incoming digital value and maps it to a specific angular position. It then generates a Pulse Width Modulation (PWM) signal, which is sent to the control wire of a servo motor. By varying the pulse width according to the received potentiometer data, the servo motor physically rotates to match the remote control input in near real-time.