Firmware for FujiNet can be flashed using the cross platform flash tool provided here. Download the program for your operating system below. NOTE: This flash tool only supports official FujiNet hardware. If you have built your own custom FujiNet with different specs then you may need to build and flash the code manually.
FujiNet-Flasher v1.4.1 updated Jan 24, 2023
FujiNet-Flasher Windows x64
FujiNet-Flasher Windows x86
FujiNet-Flasher MacOS 10.15 Catalina thru 13 Monterey
FujiNet-Flasher MacOS 10.9 Mavericks thru 10.14 Mojave
FujiNet-Flasher Linux x64
FujiNet-Flasher Ubuntu 22.04
You may also need to install the CP210x USB to UART driver which is available from https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers
Detailed usage of FujiNet-Flasher is available on the Wiki
Source code for FujiNet-Flasher is available at https://github.com/FujiNetWIFI/fujinet-flasher
NOTE: Some Windows users have reported the FujiNet Flasher will not run on their system and shows no error message (double clicking the program and nothing happens). The way around this Windows bug is to create a new user account and run FujiNet-Flasher from the new account.