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Had some silly idea about embedding ESP-32 into a cartridge and write custom software to allow the Game Boy to go online. Then I did some quick reading to find there’s already a Game Boy Pocket Sonar attachment. Holy moly, what an ecosystem!
It was the first sonar-enabled gaming accessory.
Wait, that implies there are more sonar-enabled gaming accessories. Are there any?
Apparently it was a thing in Japan: WonderSwan Handy Sonar
Holy shit, I never knew about that one! That’s wild!
