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How To Make Smartphone Control Bluetooth Car | School and College project
This is my “Arduino Projects” video series. It clearly explains to you how to make a mobile controlled Arduino 4WD robot car. Here I used ‘Arduino Nano’ for my project and if you want to work with another type of board you may have to re-edit a little bit the given code. For Bluetooth communication, I have used an HC-05 Bluetooth module. Every connection of the circuit configuration is clearly mentioned in the video.
Componants:
- 4WD total set :
- L298 Motor driver : https://amzn.to/2G0BAVP
- Arduino Nano : https://amzn.to/3ct8KJJ
- HC-05 Bluetooth Module : https://amzn.to/2S2gHw1
- Battery Holder : https://amzn.to/3i0HDXM
Diagram :
Code :
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#define light_FR 14 //LED Front Right pin A0 for Arduino Uno #define light_FL 15 //LED Front Left pin A1 for Arduino Uno #define light_BR 16 //LED Back Right pin A2 for Arduino Uno #define light_BL 17 //LED Back Left pin A3 for Arduino Uno #define horn_Buzz 18 //Horn Buzzer pin A4 for Arduino Uno #define ENA_m1 10 // Enable/speed motor Front Right #define ENB_m1 11 // Enable/speed motor Back Right #define ENA_m2 5 // Enable/speed motor Front Left #define ENB_m2 6 // Enable/speed motor Back Left #define IN_11 2 // L298N #1 in 1 motor Front Right #define IN_12 3 // L298N #1 in 2 motor Front Right #define IN_13 4 // L298N #1 in 3 motor Back Right #define IN_14 7 // L298N #1 in 4 motor Back Right #define IN_21 8 // L298N #2 in 1 motor Front Left #define IN_22 9 // L298N #2 in 2 motor Front Left #define IN_23 12 // L298N #2 in 3 motor Back Left #define IN_24 13 // L298N #2 in 4 motor Back Left int command; //Int to store app command state. int speedCar = 100; // 50 - 255. int speed_Coeff = 4; boolean lightFront = false; boolean lightBack = false; boolean horn = false; void setup() { pinMode(light_FR, OUTPUT); pinMode(light_FL, OUTPUT); pinMode(light_BR, OUTPUT); pinMode(light_BL, OUTPUT); pinMode(horn_Buzz, OUTPUT); pinMode(ENA_m1, OUTPUT); pinMode(ENB_m1, OUTPUT); pinMode(ENA_m2, OUTPUT); pinMode(ENB_m2, OUTPUT); pinMode(IN_11, OUTPUT); pinMode(IN_12, OUTPUT); pinMode(IN_13, OUTPUT); pinMode(IN_14, OUTPUT); pinMode(IN_21, OUTPUT); pinMode(IN_22, OUTPUT); pinMode(IN_23, OUTPUT); pinMode(IN_24, OUTPUT); Serial.begin(9600); } void goAhead(){ digitalWrite(IN_11, HIGH); digitalWrite(IN_12, LOW); analogWrite(ENA_m1, speedCar); digitalWrite(IN_13, LOW); digitalWrite(IN_14, HIGH); analogWrite(ENB_m1, speedCar); digitalWrite(IN_21, LOW); digitalWrite(IN_22, HIGH); analogWrite(ENA_m2, speedCar); digitalWrite(IN_23, HIGH); digitalWrite(IN_24, LOW); analogWrite(ENB_m2, speedCar); } void goBack(){ digitalWrite(IN_11, LOW); digitalWrite(IN_12, HIGH); analogWrite(ENA_m1, speedCar); digitalWrite(IN_13, HIGH); digitalWrite(IN_14, LOW); analogWrite(ENB_m1, speedCar); digitalWrite(IN_21, HIGH); digitalWrite(IN_22, LOW); analogWrite(ENA_m2, speedCar); digitalWrite(IN_23, LOW); digitalWrite(IN_24, HIGH); analogWrite(ENB_m2, speedCar); } void goRight(){ digitalWrite(IN_11, LOW); digitalWrite(IN_12, HIGH); analogWrite(ENA_m1, speedCar); digitalWrite(IN_13, HIGH); digitalWrite(IN_14, LOW); analogWrite(ENB_m1, speedCar); digitalWrite(IN_21, LOW); digitalWrite(IN_22, HIGH); analogWrite(ENA_m2, speedCar); digitalWrite(IN_23, HIGH); digitalWrite(IN_24, LOW); analogWrite(ENB_m2, speedCar); } void goLeft(){ digitalWrite(IN_11, HIGH); digitalWrite(IN_12, LOW); analogWrite(ENA_m1, speedCar); digitalWrite(IN_13, LOW); digitalWrite(IN_14, HIGH); analogWrite(ENB_m1, speedCar); digitalWrite(IN_21, HIGH); digitalWrite(IN_22, LOW); analogWrite(ENA_m2, speedCar); digitalWrite(IN_23, LOW); digitalWrite(IN_24, HIGH); analogWrite(ENB_m2, speedCar); } void goAheadRight(){ digitalWrite(IN_11, HIGH); digitalWrite(IN_12, LOW); analogWrite(ENA_m1, speedCar/speed_Coeff); digitalWrite(IN_13, LOW); digitalWrite(IN_14, HIGH); analogWrite(ENB_m1, speedCar/speed_Coeff); digitalWrite(IN_21, LOW); digitalWrite(IN_22, HIGH); analogWrite(ENA_m2, speedCar); digitalWrite(IN_23, HIGH); digitalWrite(IN_24, LOW); analogWrite(ENB_m2, speedCar); } void goAheadLeft(){ digitalWrite(IN_11, HIGH); digitalWrite(IN_12, LOW); analogWrite(ENA_m1, speedCar); digitalWrite(IN_13, LOW); digitalWrite(IN_14, HIGH); analogWrite(ENB_m1, speedCar); digitalWrite(IN_21, LOW); digitalWrite(IN_22, HIGH); analogWrite(ENA_m2, speedCar/speed_Coeff); digitalWrite(IN_23, HIGH); digitalWrite(IN_24, LOW); analogWrite(ENB_m2, speedCar/speed_Coeff); } void goBackRight(){ digitalWrite(IN_11, LOW); digitalWrite(IN_12, HIGH); analogWrite(ENA_m1, speedCar/speed_Coeff); digitalWrite(IN_13, HIGH); digitalWrite(IN_14, LOW); analogWrite(ENB_m1, speedCar/speed_Coeff); digitalWrite(IN_21, HIGH); digitalWrite(IN_22, LOW); analogWrite(ENA_m2, speedCar); digitalWrite(IN_23, LOW); digitalWrite(IN_24, HIGH); analogWrite(ENB_m2, speedCar); } void goBackLeft(){ digitalWrite(IN_11, LOW); digitalWrite(IN_12, HIGH); analogWrite(ENA_m1, speedCar); digitalWrite(IN_13, HIGH); digitalWrite(IN_14, LOW); analogWrite(ENB_m1, speedCar); digitalWrite(IN_21, HIGH); digitalWrite(IN_22, LOW); analogWrite(ENA_m2, speedCar/speed_Coeff); digitalWrite(IN_23, LOW); digitalWrite(IN_24, HIGH); analogWrite(ENB_m2, speedCar/speed_Coeff); } void stopRobot(){ digitalWrite(IN_11, LOW); digitalWrite(IN_12, LOW); analogWrite(ENA_m1, speedCar); digitalWrite(IN_13, LOW); digitalWrite(IN_14, LOW); analogWrite(ENB_m1, speedCar); digitalWrite(IN_21, LOW); digitalWrite(IN_22, LOW); analogWrite(ENA_m2, speedCar); digitalWrite(IN_23, LOW); digitalWrite(IN_24, LOW); analogWrite(ENB_m2, speedCar); } void loop(){ if (Serial.available() > 0) { command = Serial.read(); stopRobot(); //Initialize with motors stopped. if (lightFront) {digitalWrite(light_FR, HIGH); digitalWrite(light_FL, HIGH);} if (!lightFront) {digitalWrite(light_FR, LOW); digitalWrite(light_FL, LOW);} if (lightBack) {digitalWrite(light_BR, HIGH); digitalWrite(light_BL, HIGH);} if (!lightBack) {digitalWrite(light_BR, LOW); digitalWrite(light_BL, LOW);} if (horn) {digitalWrite(horn_Buzz, HIGH);} if (!horn) {digitalWrite(horn_Buzz, LOW);} switch (command) { case 'F':goAhead();break; case 'B':goBack();break; case 'L':goRight();break; case 'R':goLeft();break; case 'I':goAheadRight();break; case 'G':goAheadLeft();break; case 'J':goBackRight();break; case 'H':goBackLeft();break; case '0':speedCar = 100;break; case '1':speedCar = 115;break; case '2':speedCar = 130;break; case '3':speedCar = 145;break; case '4':speedCar = 160;break; case '5':speedCar = 175;break; case '6':speedCar = 190;break; case '7':speedCar = 205;break; case '8':speedCar = 220;break; case '9':speedCar = 235;break; case 'q':speedCar = 255;break; case 'W':lightFront = true;break; case 'w':lightFront = false;break; case 'U':lightBack = true;break; case 'u':lightBack = false;break; case 'V':horn = true;break; case 'v':horn = false;break; } } } |
