Published May 1, 2018 © CERN-OHL

BT Car

The car is controlled by Bluetooth with a HC_05 module and also by an Adafruit motor shield.

BeginnerShowcase (no instructions)2,433

Things used in this project

Hardware components

Arduino UNO

Arduino MotorShield Rev3

Jumper wires (generic)

DC motor (generic)

Software apps and online services

Arduino IDE

Story

This project is a car that can be controlled by an Android device. It works using a Bluetooth module, specifically the HC-05, and an Adafruit motor shield. An important part is to connect TX and RX of Arduino to their opposites on the module: RX and TX. To connect the HC-05 module, use male-to-female jumper wires. To connect it, we want to cut an end of the wire that is the male part and connect it to Arduino. Then fix the motor shield upon it. The steps are: solder wire at two terminals of the motor, connect the wires to motor shield, fix the tires to the motor, connect the module to the Arduino, fix the components on the chasis, power the Arduino and motor shield, and lastly upload the code. Now the car is ready to run. Download an application which has left and right mentioned in it, then connect it with HC-05 module.

BT car code

#include <AFMotor.h>
AF_DCMotor right_motor(1, MOTOR12_8KHZ);
AF_DCMotor left_motor(2, MOTOR12_8KHZ);

String readString;

void setup() {
  Serial.begin(9600);
  right_motor.setSpeed(250);
  left_motor.setSpeed(250);
}

void loop() {
  while(Serial.available()){
    delay(50);
    char c=Serial.read();
    readString+=c;
  }
  if(readString.length()>0){
    Serial.println(readString);
    if (readString =="FORWARD"){
      right_motor.run (FORWARD);
      left_motor.run (FORWARD);
      delay(500);
    }
    if (readString =="BACKWARD"){
      right_motor.run (BACKWARD);
      left_motor.run (BACKWARD);
      delay(500);
    }
    if (readString =="LEFT"){
      right_motor.run (FORWARD);
      left_motor.run (BACKWARD);
      delay(500);
    }
    if (readString =="RIGHT"){
      right_motor.run (BACKWARD);
      left_motor.run (FORWARD);
      delay(500);
    }
    if (readString =="STOP"){
      right_motor.run (RELEASE);
      left_motor.run (RELEASE);
      delay(500);
    }

    readString="";
  }
}

BT Car

Things used in this project

Hardware components

Software apps and online services

Story

Code

BT car code

Credits

karthik2006

Comments

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BT Car

BT Car

Things used in this project

Hardware components

Software apps and online services

Story

Code

BT car code

Credits

karthik2006

Comments

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