Arduino_DY_IRDaikin ARC/BRC

The Arduino_DY_IRDaikin ARC/BRC library is designed to send IR commands to control Daikin air conditioners (ARC/BRC). It is based on Ken Shirriff's IRremote library and has been further developed to support various microcontroller platforms.

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Introduction

• Start Date: September 2014
• Copyright: 2025 by Danny
• Original Name: Arduino_IRremote_Daikin
• Current Name: Arduino_DY_IRDaikin ARC/BRC
• Purpose: This library enables control of Daikin air conditioners via IR commands, including power on/off, mode switching, temperature adjustment, and more.

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Supported Platforms

Arduino UNO

Ameba Arduino

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Changelog

• 1.1.2

  • Fixed PWM frequency.
  • Refactored DYIRDaikinRecv class.

• 1.1.1

  • Fixed issues with software IR frequency and wave width.

• 1.1.0

  • Updated class and function names.
  • Added support for STM32Duino, Arduino ESP8266, Ameba platforms.
  • Added support for Arduino PWM IR signals.
  • Added SOFT IR support for Arduino UNO/Nano/Mega 2560.

• 1.0.2

  • Added support for ESP8266/Ameba (software IR) and Arduino PWM IR signals.

• 1.0.1

  • Added support for ESP8266 (software IR) and Arduino PWM IR signals.

• 1.0.0

  • Refactored code.
  • Added ARC support for IR decoding.

• 0.0.5

  • Renamed IRremote to IRremoteDaikin for isolation.
  • Refactored code.

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PWM Pinout

Arduino UNO

• Pin 3 (D3)

Arduino Leonardo

• Pin 2 (D2)

Arduino Mega

• Pin 9 (D9)

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SOFT IR Pinout

The default pin for SOFT IR when using begin() is pin 3.
If you need to use a different pin, you must specify it using begin(int irSendPin).

ESP8266

• Pin 4 (GPIO4)
• Pin 5 (GPIO5)

Ameba RTL8195

• Pin 2 (D2)
• Pin 3 (D3)
• Pin 4 (D4)
• Pin 5 (D5)
• Pin 6 (D6)
• Pin 7 (D7)

Ameba RTL8710

• Pin 2 (D2)
• Pin 5 (D5)

STM32F1

• Pin 2 (PA2)
• Pin 3 (PA3)

STM32F4

• Pin 2 (PA2)
• Pin 3 (PA3)

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Daikin ARC Functions

Basic Functions

• on(); — Turn on the air conditioner.
• off(); — Turn off the air conditioner.

Swing Control

• setSwing_on(); — Enable swing mode.
• setSwing_off(); — Disable swing mode.

Mode Settings

• setMode(int mode); — Set the mode:
  • 0 = FAN
  • 1 = COOL
  • 2 = DRY
  • 3 = HEAT (if supported by your AC model)

Fan Speed

• setFan(int speed); — Set fan speed:
  • 0-4 = Speed levels (1, 2, 3, 4, 5)
  • 5 = Auto
  • 6 = Moon mode

Temperature

• setTemp(int temp); — Set temperature:
  • 18–32°C for COOL mode
  • 10–30°C for HEAT mode
  • 18–30°C for AUTO mode

Command Execution

• sendCommand(); — Send the configured command.

Additional Functions

• decode(); — Decode IR signals.
• description(); — Print the current configuration and states.

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Daikin BRC Functions

Basic Functions

• on(); — Turn on the air conditioner.
• off(); — Turn off the air conditioner.

Swing Control

• setSwing_on(); — Enable swing mode.
• setSwing_off(); — Disable swing mode.

Fan Speed

• setFan(int speed); — Set fan speed:
  • 0 = Low
  • 1 = High

Temperature

• setTemp(int temp); — Set temperature (18–36°C).

Command Execution

• sendCommand(); — Send the configured command.

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How to Execute Commands

To use the library, you must first initialize and configure the settings in your program. After configuring, use sendCommand() to execute the command.

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Example Code for Daikin ARC

begin();              // Initialize the IR library
on();                 // Turn on the air conditioner
setSwing_off();       // Disable swing mode
setMode(1);           // Set to COOL mode
setFan(4);            // Set fan speed to maximum
setTemp(25);          // Set temperature to 25°C
description();        // Print the current configuration
sendCommand();        // Send the IR command

Acknowledgments

Kwok Fai Fong help me build Daikin BRC remote control support.

Contributors

Peter Lambrechts

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