Last year, JinGen Lim in Singapore was lucky enough to be gifted a Gameboy Color in great shape.
Apart from its intended gameplay features, I also wanted to try and build something meaningful with it, so I made this application to control my air-conditioner over its existing, reverse-engineered infrared protocol.
The IR transmitter piqued my interest — I immediately thought of building an air-conditioner remote with the GBC, and searched if anything like that existed.
To write into the cartridges, a programming card is required. I used InsideGadget’s gbxcart-rw as it was available at about US$30, well documented and easy to use. They even have a page on identifying cartridge models to make flashing them easier.
To control the A/C, the Gameboy essentially has to “blink” its infrared (IR) LED in a very specific pattern, just like the original IR remote.
See all the details in the post here. The code is available on GitHub.
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