Some resources to help you getting started with STM32 programming.
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The DYS blue series speed controllers have been developed and setup specifically for multirotor use, so no programming required. Unlike generic helicopter / aeroplane ESCs, the DYS speed controllers come preloaded with multirotor specific firmware preinstalled. Best still, it's not just any old firmware; it's the highly regarded SimonK firmware, which is optimised for multirotor applications. Google 'SimonK firmware' and you'll come across lots of forum posts singing its praises. It's designed to improve throttle precision but most importantly it can radically improve flight stability. It works by increasing the ESC refresh rate, in simple terms this means a SimonK ESC tells the motor what to do much more frequently than a non-SimonK ESC. The end product is a more 'locked in' feel, as the motors are able to make faster adjustments to the flight controller commands.
This particular ESC is rated at 30amps (40amp burst) and it supports 2S to 4S (11.1v - 14.8v) operation. It's well suited to medium sized quadcopters and hexacopters. We recommend pairing this ESC with motors like the Tarot 4006 620KV.