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HobbyKing Brushless ESC Flashing Guide
How & Why
What you need
Harness pinout: https://lazyzero.de/_detail/modellbau/kkmulticopterflashtool/adapter/00_sch.png?id=en%3Amodellbau%3Akkmulticopterflashtool%3Astart
Attaching programming cables
Preparing software to flash
Windows
macOS
Java dependancy: https://support.apple.com/kb/DL1572?locale=en_US
Flashing the ESC
Specific ESC firmware files
Red Brick 75A/200A ESCs
Refer to Brushless Hipster post and paste code.