App Inventor Arduino

Turn on the smartphone torch by Arduino

07-05-21 93

Purpose of this tutorial:

In this tutorial we will see how to turn on the smartphone torch using the Arduino board.

This is why we are going to create two programs: a mobile application with App Inventor for the smartphone and a program for the Arduino board.

Necessary components

Arduino
Smartphone
HC-06 Bluetooth
Push button
Test plate
Connecting wires

For the assembly you can see the following article:

https://www.robotique.tech/robotics/send-a-message-from-arduino-to-smartphone/

Program

Here is the program that allows you to connect the Arduino board to the smartphone and send a message containing the order to turn on the smartphone torch.

#include <SoftwareSerial.h>
const int btnPin = A0; //the push button is connected to pin A0 of the Adruino

int btnVal = 0;
SoftwareSerial hc06(2,3);
int allumer=0;
void setup(){
pinMode(btnPin,INPUT_PULLUP);
hc06.begin(9600);
}

void loop(){
btnVal=analogRead(btnPin);
if(btnVal<200) // We press the push button
{if (allumer==0){
hc06.print("allumer"); //send message to smartphone
allumer=1;
} else{
hc06.print("eteindre"); //send message to smartphone
allumer=0;
}delay(500);
}
}

#include <SoftwareSerial.h>

const int btnPin = A0; //the push button is connected to pin A0 of the Adruino

int btnVal = 0;

SoftwareSerial hc06(2,3);

int allumer=0;

void setup(){

pinMode(btnPin,INPUT_PULLUP);

hc06.begin(9600);

}

void loop(){

btnVal=analogRead(btnPin);

if(btnVal<200) // We press the push button

{if (allumer==0){

hc06.print("allumer"); //send message to smartphone

allumer=1;

} else{

hc06.print("eteindre"); //send message to smartphone

allumer=0;

}delay(500);

}

Creation of the application with App Inventor:

We are going to create a mobile application named ‘allumer_torche_arduino’ with App Inventor which allows you to receive a message from the Arduino board.

We propose to create the design of the application, with the following visual:

Programming with App Inventor

To program the application, App Inventor offers us to use the Blocks space, which allows you to create a program in the form of a block diagram. Very easy to use but requiring a little programming logic.

Here is the program of the application created in the Blocks area of the Inventor App: