> 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 DRAFT DRAFT DRAFT ## 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: * 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.\ ![](https://2727163534-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FCjtagJvJqLjd2arsEF0L%2Fuploads%2FjmfSHdy7GpHrp8rJ6bxF%2Fimage.png?alt=media\&token=eddd1657-67c0-4d54-8c42-7814c2921abb)![](https://2727163534-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FCjtagJvJqLjd2arsEF0L%2Fuploads%2FplsTDBbUnVLJEdjKEbSh%2Fimage.png?alt=media\&token=0b4c0414-565a-4444-b2dd-b702fdcbfd15) ## TROPIC Community VMU (Teensy based FMU) * Uses **Teensy 4.1** * Design files on github * Rev B has Ethernet not working * Rev C Planned * Detailed documentation on Github: \ \ ![](https://2727163534-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FCjtagJvJqLjd2arsEF0L%2Fuploads%2FI05vXtXIl6IUldfER2k1%2Fimage.png?alt=media\&token=7021ac4a-36c6-4276-9df7-e9decff3d728)