Contains a very small NEC only decoder, which does not require any timer resource.

Reduces memory footprint and decreases decoding time. Easy protocol configuration, directly in your source code.Allows for the generation of non PWM signal to just simulate an active low receiver signal for direct connect to existent receiving devices without using IR.Supports Universal Distance protocol, which covers a lot of previous unknown protocols.NEC, Panasonic, Sony, Samsung and JVC decode & send LSB first. Protocol values comply to protocol standards.An 8/16 bit ** command value as well as an 16 bit address and a protocol number is provided for decoding (instead of the old 32 bit value).Feedback LED can be activated for sending / receiving.Any pin can be used for receiving and if SEND_PWM_BY_TIMER is not defined also for sending.Quick comparison of 5 Arduino IR receiving libraries.Why do we use 30% duty cycle for sending.Hardware-PWM signal generation for sending.Incompatibilities to other libraries and Arduino commands like tone() and analogWrite().Modifying compile options with Sloeber IDE.Changing include (*.h) files with Arduino IDE.Compile options / macros for this library.How to deal with protocols not supported by IRremote.Increase strength of sent output signal.

Does not work/compile with another library.

Receiving does not run if analogWrite() or tone() is used.

Errors with using the 3.x versions for old tutorials.

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

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

Arduino uno r3 dimensions pdf