RC Bluetooth Car
RC Bluetooth Car
Components Required:
1) Arduino Nano
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2) HC-05 Bluetooth
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3) L298N motor driver
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4) 5v Buzzer
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5) 5mm LED
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6) Breadboard
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7) Lithium Battery
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8) Battery Holder
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Connection Diagram:
LED Connection
LED Arduino
+ve (220ohm) D11
GND GND
App Control Settings:
Code:
#include <SoftwareSerial.h>
SoftwareSerial BT(2, 3); // RX, TX
// Motor Pins
#define IN1 4
#define IN2 5
#define IN3 6
#define IN4 7
#define ENA 9
#define ENB 10
// LED and Buzzer
#define LED 11
#define BUZZER A1
char command;
int speedCar = 200;
void setup() {
Serial.begin(9600);
BT.begin(9600);
pinMode(IN1, OUTPUT);
pinMode(IN2, OUTPUT);
pinMode(IN3, OUTPUT);
pinMode(IN4, OUTPUT);
pinMode(ENA, OUTPUT);
pinMode(ENB, OUTPUT);
pinMode(LED, OUTPUT);
pinMode(BUZZER, OUTPUT);
analogWrite(ENA, speedCar);
analogWrite(ENB, speedCar);
stopCar();
}
void loop() {
if (BT.available()) {
command = BT.read();
Serial.println(command);
// Movement
if (command == 'F') {
forward();
}
else if (command == 'B') {
backward();
}
else if (command == 'L') {
left();
}
else if (command == 'R') {
right();
}
else if (command == 'S') {
stopCar();
}
// LED Control
else if (command == 'W') {
digitalWrite(LED, HIGH);
}
else if (command == 'w') {
digitalWrite(LED, LOW);
}
// Buzzer Control
else if (command == 'V') {
digitalWrite(BUZZER, HIGH);
}
else if (command == 'v') {
digitalWrite(BUZZER, LOW);
}
// Speed Control
else if (command == '0') speedControl(0);
else if (command == '1') speedControl(25);
else if (command == '2') speedControl(50);
else if (command == '3') speedControl(75);
else if (command == '4') speedControl(100);
else if (command == '5') speedControl(125);
else if (command == '6') speedControl(150);
else if (command == '7') speedControl(175);
else if (command == '8') speedControl(200);
else if (command == '9') speedControl(225);
else if (command == 'q') speedControl(255);
}
}
// Motor Functions
void forward() {
digitalWrite(IN1, HIGH);
digitalWrite(IN2, LOW);
digitalWrite(IN3, HIGH);
digitalWrite(IN4, LOW);
}
void backward() {
digitalWrite(IN1, LOW);
digitalWrite(IN2, HIGH);
digitalWrite(IN3, LOW);
digitalWrite(IN4, HIGH);
}
void left() {
digitalWrite(IN1, LOW);
digitalWrite(IN2, HIGH);
digitalWrite(IN3, HIGH);
digitalWrite(IN4, LOW);
}
void right() {
digitalWrite(IN1, HIGH);
digitalWrite(IN2, LOW);
digitalWrite(IN3, LOW);
digitalWrite(IN4, HIGH);
}
void stopCar() {
digitalWrite(IN1, LOW);
digitalWrite(IN2, LOW);
digitalWrite(IN3, LOW);
digitalWrite(IN4, LOW);
}
void speedControl(int spd) {
analogWrite(ENA, spd);
analogWrite(ENB, spd);
}
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