Example Code for Arduino-Motor Debugging

Hardware Preparation

• Motors: 4pcs (included in the kit)
• Romeo BLE controller: 1pc (included in the kit)
• Battery box: 1pc (included in the kit)
• Black and red wires (15 cm long): 4 pairs (included in the kit)
• Screws and washers: Included in the kit

Software Preparation

• Arduino IDE (download from click here)
• No additional libraries required for this code.

Wiring Diagram

Connect the motors to the microcontroller board as follows:

• Left motor’s red and black wires to M2
• Right motor’s red and black wires to M1
• Battery pack’s black wire to GND, red wire to VND

Other Preparation Work

1. Complete the robot assembly as per STEP1: Assemble Robot (including motor assembly, cable soldering, Romeo BLE controller installation, battery box assembly, power switch crafting, car base assembly, and motor-microcontroller connection).

Sample Code

int speedPin_M1 = 5;     //M1 Speed Control
int speedPin_M2 = 6;     //M2 Speed Control
int directionPin_M1 = 4;     //M1 Direction Control
int directionPin_M2 = 7;     //M1 Direction Control

void setup(){

}

void loop(){
    carAdvance(150,150);
    delay(1000);
    carBack(150,150);
    delay(1000);
    carTurnLeft(150,150);
    delay(1000);
    carTurnRight(150,150);
    delay(1000);
}

void carStop(){                 //  Motor Stop
  digitalWrite(speedPin_M2,0);
  digitalWrite(directionPin_M1,LOW);
  digitalWrite(speedPin_M1,0);
  digitalWrite(directionPin_M2,LOW);
}

void carTurnLeft(int leftSpeed,int rightSpeed){         //Turn Left
  analogWrite (speedPin_M2,leftSpeed);              //PWM Speed Control
  digitalWrite(directionPin_M1,LOW);
  analogWrite (speedPin_M1,rightSpeed);
  digitalWrite(directionPin_M2,HIGH);
}

void carTurnRight(int leftSpeed,int rightSpeed){        //Turn Right
  analogWrite (speedPin_M2,leftSpeed);
  digitalWrite(directionPin_M1,HIGH);
  analogWrite (speedPin_M1,rightSpeed);
  digitalWrite(directionPin_M2,LOW);
}

void carBack(int leftSpeed,int rightSpeed){             //Move backward
  analogWrite (speedPin_M2,leftSpeed);
  digitalWrite(directionPin_M1,LOW);
  analogWrite (speedPin_M1,rightSpeed);
  digitalWrite(directionPin_M2,LOW);
}
void carAdvance(int leftSpeed,int rightSpeed){          //Move forward
  analogWrite (speedPin_M2,leftSpeed);
  digitalWrite(directionPin_M1,HIGH);
  analogWrite (speedPin_M1,rightSpeed);
  digitalWrite(directionPin_M2,HIGH);
}

Result

The robot will cycle through four actions: move forward for 1 second, move backward for 1 second, turn left for 1 second, and turn right for 1 second.

Additional Information

• Ensure all wiring connections are secure and match the diagram.
• Verify the battery is installed correctly and the power switch is on.