Simple Bluetooth RC Car (Arduino Nano + HC-05) - Instructables

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Introduction: Simple Bluetooth RC Car (Arduino Nano + HC-05)

By lekpkdFollow About: Lazy Software Developer More About lekpkd »

I will share my simple project on how to use your android phone to control robot car.

Step 1: The Hardware

1 x Arduino Nano
1 x HC-05 Bluetooth module
1 x Motor Driver Module (TB6612FNG)
2 x Motors ( with Wheel)
1 x Battery for Arduino
2 x Battery for Motors

Step 2: Connections

Arduino - HC-05

D11 - Rx
D10 - Tx
+5v - VCC
GND - GND

Arduino - TB6612FNG

D3 - PWMA
D4 - AIN2
D5 - AIN1
D6 - STBY
D7 - BIN1
D8 - BIN2
D9 - PWMB
GND - GND

TB6612FNG - Battery

GND to V-
VM to V+

Arduino - LED (Optional)

D13 - LED+
GND - LED-

Step 3: Codding

/* RC_Bluetooth_2018_v6<br> * By: Khamlek HOMSOMBATH * Date: Jan 17, 2018 * Download Controller for Android : <a href="https://play.google.com/store/apps/details?id=com.lekpkd.duinojoy"> https://play.google.com/store/apps/details?id=com...> */ #include <softwareserial.h></softwareserial.h><SoftwareSerial.h> // arduino>>bluetooth // D10 (as RX) >>> Tx // D11 (as TX) >>> Rx SoftwareSerial bluetooth(10, 11); // RX, TX #define ledpin 13 // Connected to LED #define PWMA 3 #define AIN2 4 #define AIN1 5 #define STBY 6 #define BIN1 7 #define BIN2 8 #define PWMB 9void setup() { Serial.begin(19200); bluetooth.begin(9600); pinMode(ledpin,OUTPUT); pinMode(PWMA,OUTPUT); // PWM A pinMode(PWMB,OUTPUT); // PWM B pinMode(BIN1,OUTPUT); // B pinMode(BIN2,OUTPUT); // B pinMode(AIN1,OUTPUT); // A pinMode(AIN2,OUTPUT); // A pinMode(STBY,OUTPUT); // STBY digitalWrite(STBY,1); analogWrite(PWMA, 0); analogWrite(PWMB, 0); } String data = ""; void loop() { while(bluetooth.available()){ char a = bluetooth.read(); if(a==')') { setData(data); data = ""; return; } data += a; } }int ledVal = 0; void setData(String data){ data.trim(); int index = data.indexOf(","); if(index != -1){ int angle = data.substring(0,index).toInt(); int strength = data.substring(index + 1).toInt(); digitalWrite(BIN1,0); digitalWrite(BIN2,0); digitalWrite(AIN1,0); digitalWrite(AIN2,0); if (angle < 180){ digitalWrite(BIN1,1); digitalWrite(AIN1,1); if(angle < 90){ analogWrite(PWMA, strength * 255 / 100); analogWrite(PWMB, strength * (angle * 255 / 90) / 100); }else if(angle > 90){ analogWrite(PWMA, strength * ((180 - angle) * 255 / 90) / 100); analogWrite(PWMB, strength * 255 / 100); }else{ analogWrite(PWMA, strength * 255 / 100); analogWrite(PWMB, strength * 255 / 100); } }else if(angle > 180){ digitalWrite(BIN2,1); digitalWrite(AIN2,1); if(angle > 270){ analogWrite(PWMA, strength * 255 / 100); analogWrite(PWMB, strength * ((360 - angle) * 255 / 90) / 100); }else if(angle < 270){ analogWrite(PWMA, strength * ((90 - (270 - angle)) * 255 / 90) / 100); analogWrite(PWMB, strength * 255 / 100); }else{ analogWrite(PWMA, strength * 255 / 100); analogWrite(PWMB, strength * 255 / 100); } } return; } if(data.equals("a")){ if(ledVal==1) ledVal=0; else ledVal=1; digitalWrite(ledpin, ledVal); return; } Serial.print("Recieved: "); Serial.println(data); }