[FluidNC Issue#1564] Problem: Secure boot is enabled on this ESP32

#1 – bdring 于 2025-09-12

See this post on Discord. https://discord.com/channels/780079161460916227/1416056429185601536

The S3 requires special firmware.

#2 – 397624351 于 2025-09-12

> 请参阅 Discord 上的此帖子。https ://discord.com/channels/780079161460916227/1416056429185601536
>
> S3 需要特殊固件。

To the FluidNC team: Thank you so much for all your hard work and commitment. You guys are amazing, and I really appreciate everything you do.

#3 – MitchBradley 于 2025-09-12

Don’t use the installer package for S3; it doesn’t work yet. Use WebInstaller. <https://installer.fluidnc.com/>

#4 – 397624351 于 2025-09-13

> 请勿使用 S3 的安装程序包；它目前无法正常工作。请使用 WebInstaller。https ://installer.fluidnc.com/

Thank you again. Just to confirm, does this support the ESP32-S3?

#5 – MitchBradley 于 2025-09-13

Why not try it and find out?

#6 – 397624351 于 2025-09-14

> 为什么不尝试一下并找出答案呢？

Yes, I tried it several times. Although I noticed that version 3.9.8 was released on 2025-08-04 and only had an option for the ESP32-WROOM, I tried installing it anyway. The webpage showed a successful installation on my ESP32-S3, and the indicator light stayed on, but I couldn’t find the ESP32-S3’s Wi-Fi network. I also failed to access it by typing the IP address 192.168.0.1 into my browser. I tried changing the baud rate and re-flashing, but the result was the same. The serial monitor showed: 0xffffffff invalid header: 0xffffffff.

#7 – MitchBradley 于 2025-09-14

3.9.8 does not work on S3. The web installer should not have even tried to install it. I will contact the author of the web installer to try and fix that. The invalid header is due to the fact that ESP32 and ESP32-S3 have different bootloader locations. There was an early version of s3test with the wrong bootloader location in the manifest that web installer uses. I fixed that yesterday and WebInstaller now seems to install correctly on my S3.

The only version that has a chance of working on S3 is s3test. We are working hard to stabilize it. Perhaps you should wait until we are ready with an official release.