Tested and designed for RAS-B10BKVG-E (WH-UA01NE) but may work on other models as well.

IR uses Samsung-style protocol. It is possible to use Arduino IRremote library but Samsung IR implementation needs to be extended to be able to send and receive two 32bit uints and one 8bit uint.

Without a modification, IR library returns the first 32bits only which is F20D03FC in most cases.

Complete IR data format

first 32bits     second 32bits (payload)  payload checksum
0xAABBCCDD       0xEEEEEEEE               0xFF

AABB = always 0xF20D
CC = actual command
DD = xor checksum  (AA ^ BB ^ CC)

0xEEEEEEEE = state bits (various parts represent various state)

0xFF = xor checksum of all 4 bytes from 0xEEEEEEEE

Example implementation toshiba.go generates all three parts.

To run:

go run toshiba.go

You can change arguments of sendModeFanTemp() call and re-run it to see a different triple generated.

You are welcome to test it on your Toshiba AC and report your findings back.

MIT