This website is dedicated to NXT Improved Firmware.

NXT Improved Firmware aims to build an open source community around the original firmware for the LEGO® Mindstorm NXT. This includes:

  • provide easy access to source code,
  • list exactly what changes have been made, why and when (this is actually a requirement of the LEGO® open source license),
  • centralise improvements done by different contributors, whereas making forking easy,
  • try to explain firmware architecture to help newcomers,
  • document how to build the firmware,
  • provide a way to build the firmware using free software (GCC).

LEGO® is a trademark of the LEGO Group of companies which does not sponsor, authorize or endorse this site.


2021-09-28: Release version 1.29.1

More than 11 years after the first release, a new NXT Improved Firmware has been released.

I still have to clean the dust on the web site, removing the outdated information. It is now easier to have an ARM toolchain than 11 years ago.