My most useful hobby project is the one i just "hack and find out".
I make a matrix led clock that can sync time through network, using Arduino and esp32. Due to time constraint, the coding standard is horrible(magic number, dynamic allocation, no abstraction between module, etc), but hey, it works, at least for 7 years now. The code took me 3 days to finish, and i would never write such code in production FW.
There is a bug that may makes it unable to connect network, but it can be fixed by turning off then on again, i never bother to debug or patch it.
I make a matrix led clock that can sync time through network, using Arduino and esp32. Due to time constraint, the coding standard is horrible(magic number, dynamic allocation, no abstraction between module, etc), but hey, it works, at least for 7 years now. The code took me 3 days to finish, and i would never write such code in production FW.
There is a bug that may makes it unable to connect network, but it can be fixed by turning off then on again, i never bother to debug or patch it.
Perfect is the enemy of good.