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---
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title: My Nextion 2.4" DMR Last Heard Dashboard
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aliases: /posts/2020-02-16-nextion-dmr-last-heard-dashboard
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summary: >
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I created a simple last-heard-dashboard for my small Nextion screen.
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It currently shows the used slot, its origin (like Network or RF) , the
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callsign and the used talkgroup.
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categories: [amateur-radio]
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tags: [nextion,dmr]
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date: 2020-02-16T12:43:34+01:00
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lastmod: 2023-12-10T20:55:07+0000
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---
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## The display
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When I got the display there was already a Screen Layout installed -- it was
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probably the Layout of [PD0DIB].
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[PD0DIB]: https://github.com/PD0DIB/Nextion_HAM-radio-screens/tree/master/MODEL%208/GLOBE
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We're talking about a `NX3224T024_011`.
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{{< figure src="nxt_01_display.jpg" alt="display" caption="" >}}
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My dashboard now looks like this:
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{{< figure src="nxt_01_display-lh.jpg" alt="display" caption="" >}}
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The number on the bottom right corner displays the actual status code sent by
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the MMDVMHost binary. A list of these codes can be seen [here].
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[here]: https://github.com/WA6HXG/MMDVM-Nextion-Screen-Layouts/blob/master/Info%20Sheets/Status%20Codes%20and%20Fields.txt
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Also have a look at the debug output within the Nextion Editor. You get to the
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second screen (SYSTEM screen) by touching/pressing the header of the dashboard.
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Within the system screen you can clear the dashboard.
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{{< figure src="nxt_02_screens.png" alt="overview" caption="" >}}
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## The editor
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The most HMI files I found online were made with the older version of Nextion
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Editor -- v53. It is the Nextion Editor LTS version. It is available on
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[nextion.tech](https://nextion.tech/nextion-editor/).
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For the editor to work you need to install a Microsoft Visual C++
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Redistributable Package -- Nextion Editor is a 32bit application, so choose
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the 32bit version (`vc_redist.x86.exe`).
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## TFT files and HMI files
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I'm no professional and this is the way I look at these things. For me HMI files
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are source files. You can open them with Nextion Editor and edit them just right
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away. Whereas TFT files cannot be "opened" with the Nextion Editor, they have to
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be opened **with no open project** by clicking the
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`Debug` button (next to the Compile button). They get loaded into the
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simulator and you can preview the file.
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**TFT files are the compiled output of HMI files.**
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## Get the files
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I've setup a repository on Github for my screen -- for now there is one layout
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online. It only displays a last heard table with callsign and talkgroup for DMR.
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I'd like to have this for a bigger screen but I'm not sure when I'll find the
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time for it.
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- <https://codeberg.org/dominic/MMDVM-Nextion-Screen-Layouts>
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What the actual dashboard looks like.
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{{< youtube id="uqIErzgr3zQ" >}}
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## Resources
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I've found several resources that I want to list in no particular order here.
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- <https://www.hamdigitaal.nl/download/algemene-informatie/Setup-a-MMDVM-Hotspot-20161212.pdf>
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- <https://github.com/WA6HXG/MMDVM-Nextion-Screen-Layouts>
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- <https://github.com/PD0DIB/Nextion_HAM-radio-screens>
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