Reverse engineered IR protocol for HomeFit Living / Alaska SAC9010QC / SAC12010QC remote control based on an NEC 756504012 IC. It is apparently also known as the "Gree Y502 / Y512" remote and the silkscreen on the PCB states "Gree 5I2".
If you want to go straight to the juicy parts, go checkout Docs/Protocol.md.
The Docs directory contains the reverse engineered protocol description, the SAC9010QC / SAC12010QC manual and other resources used. In the IRDumper directory you'll find a quick'n'dirty tool I used to dump the binary values the remote sends to the AC unit. I put this all in a spreadsheet and used that to 'decipher' the protocol. The Photos directory contains some photos of the remote control, it's PCB and my test setup. SignalDumps contains a few dumps of the IR signal as captured by my oscilloscope.
This is the actual remote:
