樂高機器人從2006年發展到現在，韌體都有一些變更。

NXT教育版1.1所附的韌體是1.05版，

NXT教育版2.0附的韌體是1.26版，

NXT零售玩具版1.0所附的韌體可以更新到1.05版，

NXT零售玩具版2.0 (8547)所附的韌體是1.28版。

從nxtasy論壇中得知有一些差異，發文記錄之。

Below is an overview of added features of FW 1.26. Overall this version is improved and fully backwards compatible.

Added functionality within Firmware version 1.26:

- Floating point support
- Support for LEGO Temperature sensor within OnBrick interface
- Datalogging support both from the software application and from the OnBrick interface
- Support for 127 files
- Fixed a few small issues

As far as the availability of the firmware for download is concerned, we are looking into this.

If possible you may want to wait till the next firmware release, 1.28, this will be the firmware sold with the retail version of NXT 2.0 (August release date), which adds the following:

- Support for LEGO Color sensor
- Bluetooth connecting and disconnecting are now supported from user-programs
- Removed all legacy sensor support within the OnBrick interface. The functionality is still within the firmware to access from user-programs
- Fixed a few small issues