> For the complete documentation index, see [llms.txt](https://nxp.gitbook.io/vmu-rt1176/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://nxp.gitbook.io/vmu-rt1176/tropic.md).

# TROPIC

## Introduction

There are TWO variants of the small VMU / FMU (flight management unit) that use the name TROPIC.\
They are both opensource designs and may be copied and recreated as you wish.\
The X-MR-VMU-TROPIC will be released on nxp.com as MR-VMU-TROPIC later in 2026. Check NXP.com or distributors for purchasing this evaluation board. All the design files are also published on Github.

{% hint style="warning" %}
QGC (QGroundControl) supports TROPIC as of version 5.1.0 , you will need to use at least this version or later in order to use QGC to bootload firmware to the board. (noted August 2026)
{% endhint %}

## X-MR-VMU-TROPIC

* Design files are available here on github: <https://github.com/NXP-Robotics/MR-VMU-TROPIC>
* X- version is POC (proof of concept) board only
* Rev D is current. Rev E will be released on NXP.com expected in 20206
* Chip down design, single board, low cost BOM.\
  ![](/files/OtojBO17TnqR56qKWsZv)![](/files/UkCWC2qwCBUNegW2z4AR)

## TROPIC Community VMU (Teensy based FMU)

* Uses **Teensy 4.1**&#x20;
* Design files on github
* Rev B has Ethernet not working
* Rev C Planned
* Detailed documentation on Github: <https://github.com/NXPHoverGames/TropicCommunityVMU>\
  \
  ![](/files/oIzumuZiAI7whgZ3ymsA)