Circuit Diagram

Hi everyone, In this project i will show you how to control LED light with your Android device along with Arduino. I am using Hc-06 bluetooth module for arduino to communicate with the android device.

To make this prototype I am using:

  1. Arduino Uno
  2. Hc-06 Bluetooth module
  3. 2pcs 10k ohm Resistor
  4. One Red LED
  5. Breadboard
  6. Jumper wire
  7. And my Nexus 5 🙂

Here is the Arduino Bluetooth updated version 1.1.0 of Android App.

Arduino Bluetooth app

Here is the video tutorial

Circuit Diagram of Arduino bluetooth project.

Circuit Diagram

Arduino Bluetooth Code

#include <SoftwareSerial.h>

int bluetoothTx = 2; // TX-O pin of bluetooth mate, Arduino D2
int bluetoothRx = 3; // RX-I pin of bluetooth mate, Arduino D3

int led = 13;

int buttonPin1 = 7;
int buttonPin2 = 8;
int button1State = 0;
int button2State = 0;

int dataFromBt;

boolean lightBlink = false;

SoftwareSerial bluetooth(bluetoothTx, bluetoothRx);

void setup()
{
Serial.begin(9600); // Begin the serial monitor at 9600bps

bluetooth.begin(115200); // The Bluetooth Mate defaults to 115200bps
bluetooth.print("$"); // Print three times individually
bluetooth.print("$");
bluetooth.print("$"); // Enter command mode
delay(100); // Short delay, wait for the Mate to send back CMD
bluetooth.println("U,9600,N"); // Temporarily Change the baudrate to 9600, no parity
// 115200 can be too fast at times for NewSoftSerial to relay the data reliably
bluetooth.begin(9600); // Start bluetooth serial at 9600
pinMode(led, OUTPUT);
pinMode(buttonPin1, INPUT);
pinMode(buttonPin2, INPUT);
}

void loop()
{

if (bluetooth.available()) // If the bluetooth sent any characters
{
// Send any characters the bluetooth prints to the serial monitor

Serial.println((char)bluetooth.read());
dataFromBt = bluetooth.read();

//Serial.println(dataFromBt);
if (dataFromBt == ‘1’) {
Serial.println("led on");
digitalWrite(led, HIGH);
bluetooth.print("1");
}
if (dataFromBt == ‘0’) {
Serial.println("led off");
digitalWrite(led, LOW);
bluetooth.print("0");
}
if (dataFromBt == ‘b’) {
Serial.println("a");
lightBlink = true;
} else {
lightBlink = false;
}

}

if (Serial.available()) // If stuff was typed in the serial monitor
{
// Send any characters the Serial monitor prints to the bluetooth
//String myStr = (String)Serial.read();
//char myStr1[] = "hello this is testing!";

// uint8_t payload[myStr.length() + 1];
// myStr.getBytes(payload, myStr.length()+1);

int bytes=Serial.available();
//Serial.readBytes(buffer, startPosition, bytes);

bluetooth.print((char)Serial.read());

}

// and loop forever and ever!
if (lightBlink) {
digitalWrite(led, HIGH);
bluetooth.print("1");
Serial.println("HIGH");
delay(500);
digitalWrite(led, LOW);
bluetooth.print("0");
Serial.println("LOW");
delay(500);
}

//——arduino push button code—————-

button1State = digitalRead(buttonPin1);
button2State = digitalRead(buttonPin2);
if (button1State == HIGH) {
digitalWrite(led, HIGH);
bluetooth.print("1");
Serial.println("on");

}
if (button2State == HIGH) {
digitalWrite(led, LOW);
Serial.println("off");
bluetooth.print("0");
}
}
49 Comments
  1. arogya reddy 9 years ago
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