Arduino IRremote

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Table of content

Supported IR Protocols

Common problem with IRremote

Using the new library version for old examples

New features of version 4.5

New features of version 4.x

Converting your 3.x program to the 4.x version

New features of version 3.x

Converting your 2.x program to the 4.x version

Example

Old 2.x program:

New 4.x program:

Sample output

How to convert old MSB first 32 bit IR data codes to new LSB first 32 bit IR data codes

Nibble reverse

Nibble reverse map

Binary string reverse

Online tool which reverses every byte, but not the order of the bytes

Send MSB directly

Errors when using the 4.x versions for old tutorials

Staying on 2.x

Drawbacks of using 2.x

Why .hpp instead of .cpp?

Using the new .hpp files

Tutorials

3 ways to specify an IR code

1. Timing

2. Encoding schemes

3. Protocols

IRReceiver pinouts

Receiving IR codes

decodedIRData structure

Flags

To access the RAW data, use:

Print all fields:

Print the raw timing data received:

Print how to send the received data:

Ambiguous protocols

NEC, Extended NEC, ONKYO

NEC, NEC2

Samsung, SamsungLG

RAM usage of different protocols

Handling unknown Protocols

Disclaimer

Other libraries, which may cover these protocols

IRMP

IRremoteESP8266

rawirdecode and HeatpumpIR

Protocol=PULSEDISTANCE

Protocol=UNKNOWN

How to deal with protocols not supported by IRremote

Sending IR codes

Sending UNKNOWN protocol

Sending IRDB IR codes

Send pin

Polarity of send pin

List of public IR code databases

Flipper Zero

Tiny NEC receiver and sender

Principle of operation

TinyIRReceiver usage

TinyIRSender usage

The FAST protocol

FAST protocol characteristics:

Sending FAST protocol with IRremote

Sending FAST protocol with TinyIRSender

FAQ and hints

Receiving stops after analogWrite() or tone() or after running a motor.

Receiving sets overflow flag.

Problems with Neopixels, FastLed etc.

Does not work/compile with another library

Multiple IR receivers

Multiple IR sender instances

Increase strength of sent output signal

Simulate an IR receiver module

Minimal CPU clock frequency

Bang & Olufsen protocol

Examples for this library

SimpleReceiver + SimpleSender

SimpleReceiverForHashCodes

TinyReceiver + TinySender

SmallReceiver

ReceiveDemo + AllProtocolsOnLCD

ReceiveDump

SendDemo

MultipleSendPins

SendAndReceive

ReceiveAndSend

ReceiveAndSendDistanceWidth

ReceiveOneAndSendMultiple

IRDispatcherDemo

ControlRelay

IRremoteExtensionTest

SendLGAirConditionerDemo

ReceiveAndSendHob2Hood

ReceiverTimingAnalysis

UnitTest

WOKWI online examples

IR control of a robot car

Issues and discussions

Compile options / macros for this library

Changing include (.h) files with Arduino IDE

Modifying compile options / macros with PlatformIO

Modifying compile options / macros with Sloeber IDE

Supported Boards

Timer and pin usage

No timer required for sending

Incompatibilities to other libraries and Arduino commands like tone() and analogWrite()

Use NEC protocol and TinyReceiver

Change timer

Stop and start timer

Hardware-PWM signal generation for sending

Why do we use 30% duty cycle for sending

How we decode signals

NEC encoding diagrams

Quick comparison of 5 Arduino IR receiving libraries

History

Useful links

Contributors

License

Copyright