This flasing tool makes the flashing easier for Atmel chips, the 32 pin SMD type. But that means you will have to undo the heatshrink wrap every time, or when you want to make changes to the ESC firmware or settings. You can flash your ESCs directly on the chip and not using the ESC servo lead, if you don’t have a USB linker.
However You cannot use ArduinoUSBLinker, Afro USB Programming Tool or Turnigy USB Linker to enable the bootloader because they can not change fuses. When you do it in BLHeli Suite, you are given this option.
BORIS B CLEANFLIGHT FIRMWARE INSTALL
If bootloader is not loaded, you can optionally install the bootloader while flashing firmware with a AVR ISP programmer. This method of flashing is commonly called 1 wire due to the data only passes through the signal wire. I believe you can also configure your Arduino to work as a USB linker.
If you have bootloader enabled (SimonK or BLHeli), you will be able to flash latest ESC firmware and write custom settings to the ESCs by connecting to only the input signal wire (ESC servo lead), using a USB linker Programming tool such as ArduinoUSBLinker, Afro USB Programming Tool or Turnigy USB Linker. If they don’t provide soldering pads, you will have to solder directly to the chip, or using those flashing tools that sit right over the chip. If you don’t have bootloader on your ESC, you can only flash it using the soldering pads provided (Remove heatshrink tube and you should see it). To put it in the layman’s terms, bootloader affects the way how you can flash your ESC firmware.
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