Interface and Application Programming

This week our task was to write an application that interfaces with an input and/or output device that you made, comparing as many tool options as possible". I decided to write an application for switching on an LED using bluetooth.

To begin, I listed the main parts of the user interface I wanted:

Led

Arduino

Android smart phone

Since everything seemed new to me i decided, it was a big challenge so i decided to use MIT app inventor and followed the tutorials on youtube

Reference

My Android

Reference

Starting by creating an android

Shematic design

The Codes Used

     

#include "SoftwareSerial.h"



const int LED = A1; // this is physical pin 7, connect wire as sensor

const int Rx = 3; // this is physical pin 2

const int Tx = 4; // this is physical pin 3

SoftwareSerial mySerial(Rx, Tx);

char data = 0; 


void setup()

{


pinMode(Rx, INPUT);

pinMode(Tx, OUTPUT);
pinMode(LED, OUTPUT);

mySerial.begin(9600); // send serial data at 9600 bits/sec

}

void loop()
{
if(mySerial.available() > 0)      // Send data only when you receive data:
   {
      data = mySerial.read();        //Read the incoming data & store into data
           
      if(data == '1')              // Checks whether value of data is equal to 1
         digitalWrite(A1, HIGH);   //If value is 1 then LED turns ON
      else if(data == '0')         //  Checks whether value of data is equal to 0
         digitalWrite(A1, LOW);    //If value is 0 then LED turns OFF
   }

}