How do I load Bootloader on ESC with no bootloader?

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asked Feb 18, 2016 by JRocca (320 points)

I have 4 ESC's and one of them wont flash with new firmware which is apparently because it isn't loaded with a bootloader, how do I load a bootloader on it?

2 Answers

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answered Feb 18, 2016 by cmengler (2,270 points)

Making a few assumptions here, your attempting to flash your ESCs with BLHeli Suite, you've probably tried numerous ways 1-wire interfaces, CleanFlight pass through and still can't connect to the ESC. It very probable the ESC has no bootloader flashed on it.

In the case there is no bootloader you will need to flash the SimonK or BLHeli bootloader (BLHeli bootloader is smaller in size).

Easy option: For an ESC with ATMEL chip you can use a flasher tool to directly flash the firmware to the chip. Example, ZTW Spider 12A ESC's may or may not have a bootloader flashed:

Expert option: Another alternative that requires soldering wires to the chip and an USBASP programmer refer to (translate to English).

Other useful references:

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answered Aug 22 by EllPlainc

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