Firmware for FujiNet can be flashed using the easy cross platform flash program. Download the program for your operating system below. NOTE: This flash tool only supports FujiNet hardware with 8MB PSRAM and 16MB flash. If you have built your own custom FujiNet with different specs then you must build and flash the code manually.

Latest Firmware Version Info:

FujiNet Version: 0.5.24da0c96
Version Date/Time: 2021-04-10 00:41:00
Build Date/Time: Sat Apr 10 20:25:46 UTC 2021
166a770c16d48993a8fce8cde7d774e9ab2ba4af8907e21d869dec95b902232e spiffs.bin
b7b3afa3106c11f9af871e961df0b276db1e8d79a51358daeb1cc7e68a5e823f firmware.bin
d25d8a06c2dddbd1c8e97484a0a36425ed4169f56a4196cca6f72e938542e7d8 partitions.bin
964d1899d6e2c73aea1434cc8ecbc35cb682bb95467b3c76ee59b8e1cfaa9ce3 bootloader.bin
f94c5d786a7a8fab06ac5d10e33bf37711a6697636dc037559ea19cc410a17f0 boot_app0.bin
Git Commit: 4a8eba6e

View Commits Since Last Build

[4a8eba6e] webui: change header text for mounting disks
[6a79fbb7] webui: option to mount read or r/w
[24da0c96] move all hardware pin definitions to pinmap.h

FujiNet-Flasher Windows x86
FujiNet-Flasher Windows x64
FujiNet-Flasher MacOS Catalina 10.15
FujiNet-Flasher Linux x64

You may also need to install the CP210x USB to UART driver which is available from

Connect the FujiNet to your computer with a MicroUSB cable. Run the flash program with elevated privileges (as administrator or root user) so that it may access the serial port. Select the correct serial port for your FujiNet then click the Flash ESP button. The latest firmware is automatically downloaded directly from the web server and installed to the FujiNet device. The log window will display the flashing progress.

All the firmware files are available individually at

Source code for the flash program is available at

TNFS Server

Pre-compiled binaries for the FujiNet TNFSD server are available below. Our custom tnfsd source code is available on Github.

tnfsd for Windows 10 64 Bit
tnfsd for Linux 64 Bit

Raspberry Pi TNFS Server Package

This Debian package can be installed on an already running Raspberry Pi OS system from the terminal:
sudo dpkg -i tnfsd_1.0-1_armhf.deb
It automatically loads the tnfsd server at boot and accesses files from the /tnfs directory. Files in this directory must be accessible to the tnfs group (chgrp -R tnfs /tnfs/* or chown -R tnfs:tnfs /tnfs/*)


Raspberry Pi TNFS Server Image

A ready to go Raspberry Pi OS disk image with configured tnfs server is available from