Tinkernut Labs

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This video will show you the basics of controlling an Arduino through bluetooth. Click the “Step” tags for a walkthrough!

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• A Bluetooth Capable Smartphone (I’ll be using an Android).
• An Arduino ($10.99)
• An Arduino Bluetooth Module ($6.45)
• An LED ($0.99)

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Wiring

You can download the Fritzing sketch here.

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Software

Android

A good Android program for Arduino is called Ardudroid on the Google Play store.

Arduino

 
int ledPin = 13; 
int state = 0;
int flag = 0; 
 
void setup() {
 pinMode(ledPin, OUTPUT);
 digitalWrite(ledPin, LOW);
 
 Serial.begin(9600); // Default connection rate for my BT module
}
 
void loop() {

 if(Serial.available() > 0){
 state = Serial.read();
 flag=0;
 }

 if (state == '0') {
 digitalWrite(ledPin, LOW);
 if(flag == 0){
 Serial.println("LED: off");
 flag = 1;
 }
 }

 else if (state == '1') {
 digitalWrite(ledPin, HIGH);
 if(flag == 0){
 Serial.println("LED: on");
 flag = 1;
 }
 }
}

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