Esay To Learn Basic OF MIT App Inventor Arduino

 Creating Andriod apps using MIT app inventor and connected the app with arduino to make things work, I often get email stating something went missing when they follow my tutorial, Here's a step by step tutorial on getting started with creating MIT app inventor and control things with arduino Technolgy

1. App Inventor: How to Make an Android App - The Basics

 In this tutorial, I show you the basic concepts of Google App Inventor. Keep watching this series to learn many advanced features of the software. Remember, the things I go over in this video are essential to learn before building up your knowledge.

2. Getting Started with Arduino and Android 

MIT app inventor and what are the requirements need to get started with this video series, anyone watching this video can make their own app and control a LED connected to arduino without any prior experience

 Blinking an LED is the first thing we do when we getting started with electronics in this tutorial you will TURN ON and TURN OFF the LED, this is the Hello world example in this tutorial, you don't need any prior coding experience to make this application work. To test the app that created during this tutorial, you need an Android mobile or android supported devices to test your app. creating an app with MIT app inventor is very simple

example code to Arduino 

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#include <SoftwareSerial.h>
String state;// string to store incoming message from bluetooth
void setup() {
  Serial.begin(9600); // serial communication started
  pinMode(13, OUTPUT); // LED connected to 13th pin


}
//-----------------------------------------------------------------------//  
void loop() {
  while (Serial.available()){  //Check if there is an available byte to read
  delay(10); //Delay added to make thing stable 
  char c = Serial.read(); //Conduct a serial read
  state += c; //build the string- either "On" or "off"
  }  
  if (state.length() > 0) {
    
  if(state == "on") 
  {
    digitalWrite(13, HIGH);
    
      } 
  
  else if(state == "off") 
  {
    digitalWrite(13, LOW);
     }

state ="";} //Reset the variable
}

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3.Multi Servo Motor Control with Arduino and Android app

Android app using MIT app inventor 2 , I created this app to control 6 servo motor using android and arduino, I have arduino uno, which has only 6 PWM pins that's the reason I created 6 servo control, If you want to control more than 6 you can use arduino Mega to do this

Need for Components

- Arduino Board

- HC-06 / 05 Bluetooth Module

- Servo Motor x4

- Wires and Breadboard

- Battery

- Android Device

You can find the Circuit Diagram for this project above. Connect your servo according to that, If possible power the Servos and arduino separately

Check the video below to know How to make mit app for controlling multiple stepper motor.

- MIT App Inventor site to create an application.
http://appinventor.mit.edu/explore/

4.Buetooth based stepper motor controller by Arduino :

The Stepper motor used here is a rusty old EPOCH (5 wires) stepper motor, which is a unipolar stepper.

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Requiredments :

- Bluetooth Module ( for example : HC05 or HC06 )- Jumper Cables Checkout the video to know how the app control stepper motor

Source code for controlling stepper motor from android app:

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#include <AccelStepper.h>

AccelStepper stepper(AccelStepper::FULL2WIRE, 8, 9);

int spd = 1000;    // The current speed in steps/second
int sign = 1;      // Either 1, 0 or -1

void setup()
{ 
  Serial.begin(9600);
  stepper.setMaxSpeed(1000);
  stepper.setSpeed(1000);   
}

void loop()
{ 
  char c;
  if(Serial.available()) {
    c = Serial.read();
    if (c == 'f') {  // forward
      sign = 1;
    }
    if (c == 'r') {  // reverse
      sign = -1;
    }
    if (c == 's') {  // stop
      sign = 0;
    }
    if (c == '1') {  // super slow
      spd = 10;
    }
    if (c == '2') {  // slow
      spd = 100;
    }
    if (c == '3') {  // medium
      spd = 300;
    }
       if (c == '4') {  // Fast
      spd = 500;
    }
  
       if (c == '5') {  // medium
      spd = 700;
    }
  
       if (c == '6') {  // medium
      spd = 1000;
    }
    stepper.setSpeed(sign * spd);
  }
  stepper.runSpeed();
}

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5.Android Arduino Speech Recognition :

Arduino with voice commands using an Android Mobiles Before we make a voice activated home automatic system

More details Watching this vedio :

Thing that you'll need:

- 5 LED Indicators (the color of your choice)
- Arduino UNO (a clone works fine)
- HC-05 Serial Bluetooth Module
- Solderless Breadboard
- Jumper Cables

Bluetooth voice control for arduino source code

//Voice Activated Arduino (Bluetooth + Android)

//Feel free to modify it but remember to give credit

String voice;

int

led1 = 2, //Connect LED 1 To Pin #2

led2 = 3, //Connect LED 2 To Pin #3

led3 = 4, //Connect LED 3 To Pin #4

led4 = 5, //Connect LED 4 To Pin #5

led5 = 6; //Connect LED 5 To Pin #6

//--------------------------Call A Function-------------------------------//

void allon(){

     digitalWrite(led1, HIGH);

     digitalWrite(led2, HIGH);

     digitalWrite(led3, HIGH);

     digitalWrite(led4, HIGH);

     digitalWrite(led5, HIGH);

}

void alloff(){

     digitalWrite(led1, LOW);

     digitalWrite(led2, LOW);

     digitalWrite(led3, LOW);

     digitalWrite(led4, LOW);

     digitalWrite(led5, LOW);

}

//-----------------------------------------------------------------------//

void setup() {

  Serial.begin(9600);

  pinMode(led1, OUTPUT);

  pinMode(led2, OUTPUT);

  pinMode(led3, OUTPUT);

  pinMode(led4, OUTPUT);

  pinMode(led5, OUTPUT);

}

//-----------------------------------------------------------------------//

void loop() {

  while (Serial.available()){  //Check if there is an available byte to read

  delay(10); //Delay added to make thing stable

  char c = Serial.read(); //Conduct a serial read

  if (c == '#') {break;} //Exit the loop when the # is detected after the word

  voice += c; //Shorthand for voice = voice + c

  }

  if (voice.length() > 0) {

    Serial.println(voice);

//-----------------------------------------------------------------------//

  //----------Control Multiple Pins/ LEDs----------//

       if(voice == "*all on") {allon();}  //Turn Off All Pins (Call Function)

  else if(voice == "*all off"){alloff();} //Turn On  All Pins (Call Function)

  //----------Turn On One-By-One----------//

  else if(voice == "*TV on") {digitalWrite(led1, HIGH);}

  else if(voice == "*fan on") {digitalWrite(led2, HIGH);}

  else if(voice == "*computer on") {digitalWrite(led3, HIGH);}

  else if(voice == "*bedroom lights on") {digitalWrite(led4, HIGH);}

  else if(voice == "*bathroom lights on") {digitalWrite(led5, HIGH);}

  //----------Turn Off One-By-One----------//

  else if(voice == "*TV off") {digitalWrite(led1, LOW);}

  else if(voice == "*fan off") {digitalWrite(led2, LOW);}

  else if(voice == "*computer off") {digitalWrite(led3, LOW);}

  else if(voice == "*bedroom lights off") {digitalWrite(led4, LOW);}

  else if(voice == "*bathroom lights off") {digitalWrite(led5, LOW);}

//-----------------------------------------------------------------------//

voice="";}} //Reset the variable after initiating

6.How to make an Android phone controlled Arduino Robot

How to make an app for controlling an robot by android app, you will be using android phone as remote controller to control the robot. You need 2 gear motor with wheels A motor driver, you can use any of the motor driver you want, I used L293D motor driver for this project. You also need a battery and connecting wires, apart from that as usual a Bluetooth and Arduino board is needed to complete this tutorial

Complete  Saw this Toturial vedio :

Android RC control Robot using Arduino :

Sample Source Code Of Arduino Robot Car :

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#include <SoftwareSerial.h>

SoftwareSerial BT(10, 11); //TX, RX respetively
String readdata;

void setup() {
 BT.begin(9600);
 Serial.begin(9600);
  pinMode(3, OUTPUT); // connect to input 1 of l293d
  pinMode(4, OUTPUT); // connect to input 4 of l293d
  pinMode(5, OUTPUT); // connect to input 3 of l293d
  pinMode(6, OUTPUT); // connect to input 2 of l293d

}
//-----------------------------------------------------------------------// 
void loop() {
  while (BT.available()){  //Check if there is an available byte to read
  delay(10); //Delay added to make thing stable
  char c = BT.read(); //Conduct a serial read
  readdata += c; //build the string- "forward", "reverse", "left" and "right"
  } 
  if (readdata.length() > 0) {
    Serial.println(readdata); // print data to serial monitor
// if data received as forward move robot forward
  if(readdata == "forward") 
  {
    digitalWrite(3, HIGH);
    digitalWrite (4, HIGH);
    digitalWrite(5,LOW);
    digitalWrite(6,LOW);
    delay(100);
  }
  // if data received as reverse move robot reverse

  else if(readdata == "reverse")
  {
    digitalWrite(3, LOW);
    digitalWrite(4, LOW);
    digitalWrite(5, HIGH);
    digitalWrite(6,HIGH);
    delay(100);
  }
// if data received as right turn robot to right direction.
  else if (readdata == "right")
  {
    digitalWrite (3,HIGH);
    digitalWrite (4,LOW);
    digitalWrite (5,LOW);
    digitalWrite (6,LOW);
    delay (100);
   
  }
// if data received as left turn robot to left direction
 else if ( readdata == "left")
 {
   digitalWrite (3, LOW);
   digitalWrite (4, HIGH);
   digitalWrite (5, LOW);
   digitalWrite (6, LOW);
   delay (100);
 }
 // if data received as stop, halt the robot

 else if (readdata == "stop")
 {
   digitalWrite (3, LOW);
   digitalWrite (4, LOW);
   digitalWrite (5, LOW);
   digitalWrite (6, LOW);
   delay (100);
 }

  


readdata="";}} //Reset the variable

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