Dobrica Pavlinušić's random unstructured stuff
MFL1218: Revision 4

Cheerson CX-20 CX20 ESC Electronic Speed Controller

board name: MFL1218

Sil F330

http://www.olliw.eu/2012/owsilprog-tutorials/comment-page-3/

alternative firmware: https://github.com/bitdump/BLHeli (for silab chips, but not this board)