Build Android Bluetooth App for Arduino

Hi, today i am going to make a android app for arduino Bluetooth module HC-06.Through this app you can control a light or led form your android phone.Lets do it..........

Go to MIT App Inventor

Link: http://appinventor.mit.edu/explore/

In the menu bar click on “Create App!”

Login using your gmail account.

If you don't have gmail account or Google Account.Then create an account.

In the menu bar go to “Projects”.Click on it.You will see a drop down menu.In that drop down menu click on the “Start new project”.Then a page will came and want a project name.Give a project name.I give the project name "Bluetooth_Remot".Remember in this online editor you are not allow to give space in the name.So, i use this "_" .

Now, you are in design page.In this page you will drag and draw the outer look of the app.

From "Palette" in "User Interface" bar drag the "ListPicker" and drop it into the screen.

In the "Properties" bar change the name of this "ListPicker1" to "Connect".

Like before from "Palette" in "User Interface" bar drag two "Button" and drop it into the screen.And from "Properties" bar change the name of that two Button "Text for Button1" and "Text for Button2" into "ON" and "OFF".

Now, from "Palette" in "Connectivity" bar "BluetoothClient" and drop it into the screen.

From "Palette" in "Sensors" bar "Clock" and drop it into the screen.

On the top click on the "Blocks" and you will get a new page like shown in the picture.

From "Blocks" to "Screen1" to "ListPicker1" click it and you will get boxes like the picture.Now Drag "When ListPicker1 .BeforePicking do" and drop into "Viewer".Again from that list drag "set ListPicker1 . Elements to" and drop it into "When ListPicker1 .BeforePicking do".That will looks like the picture.

From "Blocks" to "Screen1" to "BluetoothClient1" click it and you will get boxes like the picture.Drag "BluetoothClient1 . AddressesAndNames" into "set ListPicker1 . Elements to".

Like Blocks(Step-1) and Blocks(Step-2) drag and drop like picture.

Like before from "Blocks" to "Screen1" to "Button1" drag "when Button1 . Click do" into "Viewer" .

From "Blocks" to "Screen1" to "BluetoothClient1" drag "call BluetoothClient1 . SendText text " into "Viewer" .

From "Blocks" to "Screen1" to "Text" drag " " " " into "Viewer".

Now in the text box in " " write "ON".

Flow the same steps for "Button2" shown in pictures.Only change is write "OFF" in the box.

Congratulation !!!!!!!!!!!!!!!! You just build your Bluetooth app.Now to download it go to top click on "Build" and then click on "App(save .apk to my computer)".

Now you have your remote to control arduino led light in pin 13.By using this remote you can ON or OFF any thing that you want.Here the simple code for arduino to control pin 13 led.

Code:

String a;

int led = 13;// add the pin number that you want to control.

void setup()

{

Serial.begin(9600);

pinMode(led,OUTPUT);

}

void loop() {

while(Serial.available()){

a=Serial.read();

Serial.println(a);

if(a=="ON")

{

digitalWrite(led,HIGH);

}

if(a=="OFF")

{

digitalWrite(led,LOW);

}

}

}