Updating Klipper Firmware on a Fly-E3-Pro-V3 in USB mode

How to update the klipper firmware running on a Fly-E3-Pro-V3 in USB mode

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Configuring and installing Klipper for USB

Compile Klipper firmware for Fly-E3-Pro-V3

Tip: To read more about the KCONFIG_CONFIG option, see here

ssh to your klipper host console
cd to the klipper directory
```
cd ~/klipper
```

Run make clean

make clean KCONFIG_CONFIG=config.e3prov3

Important: If when running the above command you get this output
Using default symbol values (no 'config.e3prov3'). Configuration saved to 'config.e3prov3'
Then you need to set all the correct settings when running make menuconfig below.
Otherwise, skip to compiling klipper.

Open menuconfig

make menuconfig KCONFIG_CONFIG=config.e3prov3

Set the following settings
- [*] Enable extra low-level configuration options
- Micro-controller Architecture (STMicroelectronics STM32)
- Processor model (STM32F407)
- Bootloader offset (32KiB bootloader)
- Clock Reference (8 MHz crystal)
- Communication interface (USB (on PA11/PA12))
- USB ids
- () GPIO pins to set at micro-controller startup
  
  Klipper Menu Config USB
Quit and save the configuration
Run Make to compile the firmware
```
make KCONFIG_CONFIG=config.e3prov3 -j4
```

Flash Klipper USB firmware with Katapult over USB

Look in your printer.cfg file and make note of the serial ID for your board.

Run the make flash command to flash the firmware

make KCONFIG_CONFIG=config.e3prov3 flash FLASH_DEVICE= {Your serial ID here }

Example

make KCONFIG_CONFIG=config.e3prov3 flash FLASH_DEVICE=/dev/serial/by-id/usb-katapult_stm32f407xb_170038000650314D35323820-if00 

Your Fly-E3-Pro-V3 should now have klipper firmware updated and be ready to use again.

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