notes on using Dabble's LED Brightness Control example with Arduino Uno and HC-05 module

In our continuous exploration of integrating mobile applications with microcontroller platforms, we delve into the practical application of Dabble's LED Brightness Control module. This post provides a very sparse collection of notes on interfacing the Arduino Uno with the HC-05 Bluetooth module, enabling control of LED brightness via a smartphone. By following this tutorial, you'll enhance your project's interactivity, bridging the gap between mobile technology and embedded systems.

Example

Sketch

/*

Led Brightness Control Module allows user to control any digital pin on their board. They can turn pin ON or OFF, can

also vary its PWM if that functionality is supported on that pin.

NOTE:

1)For Arduino Mega Connect Bluetooth on Serial3 pins.

2)For Arduino Uno/Nano library uses SoftwareSerial,hence pin 2 and pin 3 are used

as RX and TX pins respectively on SoftwareSerial.Hence with arduino Uno

follow below connections for bluetooth.

UNO - BLUETOOTH

2 - TX

3 - RX

3)For Uno/Nano keep bluetooth Baudrate below 38400.

You can reduce the size of library compiled by enabling only those modules that you want

to use. For this first define CUSTOM_SETTINGS followed by defining INCLUDE_modulename.

Explore more on: https://thestempedia.com/docs/dabble/led-brightness-control-module/

*/

#define CUSTOM_SETTINGS

#define INCLUDE_LEDCONTROL_MODULE

#include <Dabble.h>

void setup() {

Serial.begin(9600); // make sure your Serial Monitor is also set at this baud rate.

Dabble.begin(38400); //Change this baudrate as per your bluetooth baudrate. Connect bluetooth on digital pin 2(RX) and 3(TX) for Uno/Nano and on Serial3 pins for Mega.

}

void loop() {

Dabble.processInput(); //this function is used to refresh data obtained from smartphone.Hence calling this function is mandatory in order to get data properly from your mobile.

Serial.print("Led:");

Serial.print(LedControl.getpinNumber());

Serial.print('\t');

Serial.print("State:"); //0 means OFF, 1 means ON

Serial.print(LedControl.getpinState());

Serial.print('\t');

Serial.print("Brightness:");

Serial.println(LedControl.readBrightness());

}

References

[1] https://ai.thestempedia.com/docs/dabble-app/led-brightness-control-module/