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.ba2f6751
Version Date/Time: 2021-07-27 12:03:04
Build Date/Time: Mon Aug 16 01:45:57 UTC 2021
a90b9bb01adb64d744b5854232afdffadcd97ab96b844f28b635b71419b35fbe spiffs.bin
3b405c02b9fb621cc358dd01c902a4397aac4e848ede59e0e71615e7aa0ca284 firmware.bin
d25d8a06c2dddbd1c8e97484a0a36425ed4169f56a4196cca6f72e938542e7d8 partitions.bin
964d1899d6e2c73aea1434cc8ecbc35cb682bb95467b3c76ee59b8e1cfaa9ce3 bootloader.bin
f94c5d786a7a8fab06ac5d10e33bf37711a6697636dc037559ea19cc410a17f0 boot_app0.bin
Git Commit: d5ab7817

View Commits Since Last Build

[d5ab7817] Add hardware version display to web ui
[ba2f6751] Change sd card detection gpio pin and still support existing hardware
[c770dedb] clean up compiler warnings.
[622f0e4d] Enumeration change in newer IDF's.
[57d973b1] Merge pull request #459 from gkrzystek/master
[0a0fd7a6] update autorun.atr. build 21e5521 , compressed with config-loader build 8e5941e

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