I've build BlueRetro [1] an universal Bluetooth controller adapter for nearly all pre-USB gaming console. I guess I could update from my previous post in a similar thread. [2] Long story short, my open source firmware is used by product makers and they make a voluntary contribution often base on how many unit they sell. It is also widely used by Chinese company on AliExpress. I got one of those Chinese company to sponsor me a significant amount on GitHub sponsor since August 2022. I guess they forgot about it, still going ever since! I still make 1000 USD a month from the various HW makers. One new thing I made this year after 5 year of doing this hobby, is that I finally manufactured and sold one adapter base on this code myself for the OG Xbox console. [3] Factoring all the expenses I made 7K for a batch of 300. I plan to do a 2nd batch next year, which should yield double that since I will only incur raw materials & shipping expenses. It took me 48 hour of manual labor to assemble them and ship them. So it's doesn't make much sense TBH, but it's a good experience. Made me appreciate my desk job. [1] https://github.com/darthcloud/BlueRetro [2] https://news.ycombinator.com/item?id=35568543 [3] https://blueretro.com