BLHELI is a firmware for ESC's. BLHELI_32 is the newer and improved version (generation 3 of the BLHELI firmware - after BLHELI and BLHELI_S) utilizing 32 bit processors on the ESC. The main job of ESC firmware is to control the speed of your motor and thus the timing for switching the motors phases. In this article we will discuss major differences between the new BLHELI_32 and the predecessor BLHELI_S.