rnv812 / ArduinoBluetoothBacklight

ArduinoBluetoothBacklight

Arduino Nano firmware for managing addressable LED strip via bluetooth (HC-06).

Introduction

Intent: Backlight for room with remote control from smartphone;

Used components:

• Adressable led strip (ws2812b);
• Arduino Nano;
• Bluetooth module HC-06.

Main functions:

• power control (on, off, off by timer);
• color control (hue, saturation, brightness);
• different color modes.

Remote protocol

Each message consists of 3 bytes.

1. command code byte;
2. command argument byte;
3. command argument operation byte.

List of commands

Table of all possible commands and their byte codes:

Command	Argument	Operation	Description
Power
0x00	0x00	Ignored	turn off
0x00	0x01	Ignored	turn on
Hue
0x01	0xXX	0x00	set hue to XX
0x01	0xXX	0x01	decrease hue by XX
0x01	0xXX	0x02	increase hue by XX
Saturation
0x02	0xXX	0x00	set saturation to XX
0x02	0xXX	0x01	decrease saturation by XX
0x02	0xXX	0x02	increase saturation by XX
Brightness
0x03	0xXX	0x00	set brightness to XX
0x03	0xXX	0x01	decrease brightness by XX
0x03	0xXX	0x02	increase brightness by XX
Speed
0x04	0xXX	0x00	set speed to XX
0x04	0xXX	0x01	decrease speed by XX
0x04	0xXX	0x02	increase speed by XX
Mode
0x05	0xXX	Ignored	switch mode to XX
Timer
0x06	0xXX	0x00	set turn off timer to XX minutes
0x06	0xXX	0x02	increase turn off timer by XX minutes
0x06	Ignored	0x03	clear turn off timer

List of implementd modes

0. regular (backlight);
1. breathing;
2. morphing rainbow;
3. running rainbow;
4. fire.

Actual list of implemented modes is placed in source code here in AnimationModes enumeration.

References

Platform

Project is based on PlatformIO. I use it as VS Code extension.

Dependencies

• FastLED for easy control led strip.

Bluetooth app

As sender app, I recommend Serial Bluetooth Terminal by Kai Morich. There you can nicely customize interface so it will look like usual remote.

Use this configuration file to get your app keyboard looks like on picture below.

May be in the future custom mobile app will be implemented...

Notes

If you have ESP8266, I recommend to see this project which is much more functional.