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.e09997c5
Version Date/Time: 2021-01-16 02:23:59
Build Date/Time: Sat Jan 16 23:27:52 UTC 2021
e4cb16d47c2985a916eb2bd1352e51717e89beb8c737ec7ce92d886077f6257a spiffs.bin
b0ef9a6b55bf2e7a448689f1dfa0fdf0ba8e03fff1546353f1585f934de1c1e6 firmware.bin
d25d8a06c2dddbd1c8e97484a0a36425ed4169f56a4196cca6f72e938542e7d8 partitions.bin
32baa3f38cec89896a47541a74cc6160d0872d43841b6ca19c8c0f89b1311148 bootloader.bin
f94c5d786a7a8fab06ac5d10e33bf37711a6697636dc037559ea19cc410a17f0 boot_app0.bin
Git Commit: cc1aca3b

View Commits Since Last Build

[cc1aca3b] Save BT status and start at boot if enabled. Fixes 419
[e09997c5] Merge pull request #423 from mleair/master
[9e1ba6ea] In sioModem::sio_poll_1(), double the delay so there's plenty of time to load R: handler for stock machines and machines that support HSIO.
[f5382ee3] SIO shutdown put before esp_restart().
[c379297b] Fixes #420 finish rewind.
[13addef6] Refs #420 - add function to get cassette from bus.
[9d8a44f9] Refs #420 add rewind button.
[a0e2254c] Web UI: Display current dir. path for hosts

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