How to update SimonK Firmware on ESCs using an USBASP tool

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In this video I run through the process to flash a HobbyKing 20A ESC with SimonK firmware using a modified cable and some freely available software.
When downloading the software please consider donating a few dollars to the authors, they do this for free and it is people like them that make this hobby fun and affordable.
You can download the software from
I used a USBAPS programmer from Hobbyking to make the cable and you should be able to find the Arduino risers I used on placed like eBay by searching for 'Arduino Single Row Stackable PCB Header Sockets '
Let me know if you have any comments or questions, happy flying!
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