App Inventor 2 + Arduino - Controlling Arduino via Bluetooth using an Android Phone

This is a simple example on how to control the on/off of the LED attached to pin 13 of an Arduino Uno board using an Android App. developed using MIT App Inventor 2.

Schematic

- HC-06 RXD -> Arduino Uno Pin 3
- HC-06 TXD -> Arduino Uno Pin 2
- HC-06 GND -> Arduino Uno GND
- HC-06 VCC -> Arduino Uno 5V

Arduino Code

Note, using SoftwareSerial.h will invalid abs() - see http://forum.arduino.cc/index.php?topic=114532.0

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

#include <SoftwareSerial.h> SoftwareSerial mySerial(2, 3); // RX, TX char incomingByte = 'L'; // For incoming serial data void setup() { mySerial.begin(9600); // Initialize Software Serial // initialize digital pin 13 as an output. pinMode(13, OUTPUT); } void loop() { if (mySerial.available() > 0) { incomingByte = mySerial.read(); if (incomingByte == 'H') digitalWrite(13, HIGH); if (incomingByte == 'L') digitalWrite(13, LOW); } }

App Inventor 2 - Designer

App Inventor 2 - Blocks

References:

App Inventor 2 Tutorial-Arduino Bluetooth Control
https://www.youtube.com/watch?v=pR2rTRDZ_-Y

Android MIT App Inventor – Auto Connect To Bluetooth
http://www.martyncurrey.com/android-mit-app-inventor-auto-connect-to-bluetooth/

Part 1: Basic Bluetooth communications using App Inventor
http://appinventor.pevest.com/?p=520

Using ListPicker for displaying and selecting from on screen lists
http://appinventor.pevest.com/?p=107

Bluetooth car with App Inventor 2.
https://www.youtube.com/watch?v=z0UQAyDZeBo

Простая Bluetooth машинка на Arduino
https://geektimes.ru/post/255442/