[comex]

Unlike the original version, this version compiles and seems to basically work correctly. However, the design is misleading: `buffer` is declared as an array of 4 bytes but only the first byte is ever used. The code also has suboptimal performance and error handling, though that's not the end of the world.

[raggi]

all true, as I said in another fork of the thread, this comes down to part of what humans will still be valuable for in this loop: distilling poor requirements into better requirements.