How to make a Remote Control RC car using Arduino and HC-06 bluetooth module
Growing from a poor family, I am amazed with remote control toys, robot, and radio. I am curious on how those stuffs work? One time when I was a kid, I found an old rusty but still functional DC motor usually found on battery powered toy car. When I got home, I connected it to a battery and I spent the rest of my day thinking and planning on how I am going to use it for my toy boat.
My fascination with how stuff works especially in the field of Electronics is my burning passion, that is why I am still tinkering. So today, we are going to convert this battery-powered toy car to a remote control car.
This toy car has 3 DC motors inside, 1 motor controlling the right side front and rear wheels, 1 motor controlling the left side front and rear motor, and another 1 motor controlling the shovel arm rising and lowering.
 |
| tech-to-tinker |
Materials:
1. Battery powered toy car (our subject).
2. Arduino Uno (or any other microcontroller available)
3. Motor driver (here I am using 4 motors and 16 servo Arduino Uno shield of doit.am)
4. HC-06 Bluetooth module
5. Some jumper wires
1. Battery powered toy car (our subject).
2. Arduino Uno (or any other microcontroller available)
3. Motor driver (here I am using 4 motors and 16 servo Arduino Uno shield of doit.am)
4. HC-06 Bluetooth module
5. Some jumper wires
Video Demonstration:
Visit my youtube channel: tech-to-tinker
SOURCE CODE:
#include <softwareserial.h>
// Arduino UNO Rx, Tx
SoftwareSerial hc06(13,12);
String cmd="";
//Motor A or MOTOR 1
int PWMA = 9; //Speed control
int DIRA = 8; //Direction
//Motor B or MOTOR 2
int PWMB = 6; //Speed control
int DIRB = 7; //Direction
//Motor C or MOTOR 3
int PWMC = 5; //Speed control
int DIRC = 4; //Direction
//Motor D or MOTOR 4gggjh
int PWMD = 3; //Speed control
int DIRD = 2; //Direction
void setup() {
//Initialize Serial Monitor
Serial.begin(9600);
//Initialize Bluetooth Serial Port
hc06.begin(9600);
pinMode(PWMA, OUTPUT);
pinMode(DIRA, OUTPUT);
pinMode(PWMB, OUTPUT);
pinMode(DIRB, OUTPUT);
pinMode(PWMC, OUTPUT);
pinMode(DIRC, OUTPUT);
pinMode(PWMD, OUTPUT);
pinMode(DIRD, OUTPUT);
// Set default at full stop
stopped();
movehalt();
Serial.print("Setup DONE.");
}
void loop() {
//Read data from HC06
while(hc06.available()>0){
cmd+=(char)hc06.read();
}
//Select function with cmd
if(cmd!=""){
cmd.trim(); // Remove added LF in transmit
// We expect Command from bluetooth
if (cmd.equals("F")) {
Serial.println("Vehicle Forward");
forward();
}else if (cmd.equals("B")){
Serial.println("Vehicle Backward");
backward();
}else if(cmd.equals("L")){
Serial.println("Vehicle Turn Left");
turnleft();
}else if(cmd.equals("R")){
Serial.println("Vehicle Turn Right");
turnright();
}else if(cmd.equals("S")){
Serial.println("Vehicle Stop");
stopped();
}else if(cmd.equals("U")){
Serial.println("Crane UP");
moveup();
}else if(cmd.equals("D")){
Serial.println("Crane DOWN");
movedown();
}else if(cmd.equals("H")){
Serial.println("Crane HALT");
movehalt();
}else{
Serial.println("Command UNKNOWN");
stopped();
movehalt();
}
Serial.print("Command recieved:");
Serial.println(cmd);
cmd=""; //reset cmd
}
delay(100);
}
// Function for the vehicle to move FORWARD
void forward() {
analogWrite(PWMA, 255);
digitalWrite (DIRA, HIGH);
analogWrite(PWMB, 255);
digitalWrite (DIRB, HIGH);
}
// Function for the vehicle to move BACKWARD
void backward() {
analogWrite(PWMA, 255);
digitalWrite (DIRA, LOW);
analogWrite(PWMB, 255);
digitalWrite (DIRB, LOW);
}
// Function for the vehicle to turn RIGHT
void turnright() {
analogWrite(PWMA, 255);
digitalWrite (DIRA, HIGH);
analogWrite(PWMB, 0);
digitalWrite (DIRB, HIGH);
}
// Function for the vehicle to turn LEFT
void turnleft() {
analogWrite(PWMA, 0);
digitalWrite (DIRA, HIGH);
analogWrite(PWMB, 255);
digitalWrite (DIRB, HIGH);
}
// Function for the vehicle to STOP
void stopped() {
analogWrite(PWMA, 0);
digitalWrite (DIRA, HIGH);
analogWrite(PWMB, 0);
digitalWrite (DIRB, HIGH);
}
// Function for the crane to move UP
void moveup() {
analogWrite(PWMC, 255);
digitalWrite (DIRC, HIGH);
}
// Function for the crane to move DOWN
void movedown() {
analogWrite(PWMC, 255);
digitalWrite (DIRC, LOW);
}
// Function for the crane to HALT
void movehalt() {
analogWrite(PWMC, 0);
digitalWrite (DIRC, HIGH);
}
If you find this lesson useful, please consider supporting my blogspot and Youtube channel:
Thank you. Happy tinkering.