Arduino NRF24L01 Wireless Joystick Robot Car
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| Arduino NRF24L01 Wireless Joystick Robot Car |
Hey friends in this video I will show you how to make Arduino NRF24L01 Wireless Joystick controlled Robot Car which uses NRF24L01 Transceiver for wireless communication.
I will be using My Joystick controller to control car that we made previously
In this project I will show you how to wirelessly control a Robo car with this controller
Materials:
Arduino NANO
NRF24L01 Transceiver
Joystick Module
L298N Motor Driver
BreadBoard
18650 Battery
Circuit:
Transmitter :
Receiver:
Code arduino Transmitter :
//Joystick Car Transmitter
#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>
RF24 radio(5,6); // CE, CSN
const byte address[6] = "00001";
char xyData[32] = "";
int joystick[2];
int buzz = 10;
void setup() {
Serial.begin(9600);
radio.begin();
radio.openWritingPipe(address);
radio.setPALevel(RF24_PA_MAX);
radio.stopListening();
pinMode(buzz, OUTPUT);
digitalWrite(buzz,LOW);
}
void loop() {
joystick[0] = analogRead(A0);
joystick[1] = analogRead(A2);
radio.write( joystick, sizeof(joystick) );
}
Code arduino Receiver :
//Joystick Car Receiver
#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>
#define enA A5
#define in1 6
#define in2 7
#define enB A3
#define in3 2
#define in4 4
RF24 radio(9,10); // CE, CSN
const byte address[6] = "00001";
char receivedData[32] = "";
int xAxis, yAxis;
int motorSpeedA = 0;
int motorSpeedB = 0;
int joystick[2];
void setup() {
pinMode(enA, OUTPUT);
pinMode(enB, OUTPUT);
pinMode(in1, OUTPUT);
pinMode(in2, OUTPUT);
pinMode(in3, OUTPUT);
pinMode(in4, OUTPUT);
Serial.begin(9600);
digitalWrite(in1, LOW);
digitalWrite(in2, LOW);
digitalWrite(in3, LOW);
digitalWrite(in4, LOW);
radio.begin();
radio.openReadingPipe(0, address);
radio.setPALevel(RF24_PA_MAX);
radio.startListening();
}
void loop() {
if (radio.available()) { // If the NRF240L01 module received data
radio.read( joystick, sizeof(joystick) );
radio.read(&receivedData, sizeof(receivedData));
yAxis = joystick[0];
xAxis = joystick[1];
Serial.println(yAxis);
Serial.println(xAxis);
}
if (yAxis < 470) {
digitalWrite(in1, HIGH);
digitalWrite(in2, LOW);
digitalWrite(in3, HIGH);
digitalWrite(in4, LOW);
motorSpeedA = map(yAxis, 470, 0, 0, 255);
motorSpeedB = map(yAxis, 470, 0, 0, 255);
}
else if (yAxis > 550) {
digitalWrite(in1, LOW);
digitalWrite(in2, HIGH);
digitalWrite(in3, LOW);
digitalWrite(in4, HIGH);
motorSpeedA = map(yAxis, 550, 1023, 0, 255);
motorSpeedB = map(yAxis, 550, 1023, 0, 255);
}
else {
motorSpeedA = 0;
motorSpeedB = 0;
}
if (xAxis > 550) {
int xMapped = map(xAxis, 550, 0, 0, 255);
motorSpeedA = motorSpeedA + xMapped;
motorSpeedB = motorSpeedB - xMapped;
// Confine the range from 0 to 255
if (motorSpeedA < 0) {
motorSpeedA = 0;
}
if (motorSpeedB > 255) {
motorSpeedB = 255;
}
}
if (xAxis < 470) {
int xMapped = map(xAxis, 470, 1023, 0, 255);
motorSpeedA = motorSpeedA - xMapped;
motorSpeedB = motorSpeedB + xMapped;
if (motorSpeedA > 255) {
motorSpeedA = 255;
}
if (motorSpeedB < 0) {
motorSpeedB = 0;
}
}
if (motorSpeedA < 70) {
motorSpeedA = 0;
}
if (motorSpeedB < 70) {
motorSpeedB = 0;
}
analogWrite(enA, motorSpeedA); // Send PWM signal to motor A
analogWrite(enB, motorSpeedB); // Send PWM signal to motor B
}