u/jerr9185

I open-sourced the layout and the scripts if anyone else is in the Garmin ecosystem and wants to set it up!

https://github.com/Jay9185/TRMNL\_Garmin\_cirqa.git

As a pilot, looking at a 2D line on an iPad doesn't capture altitude changes or the scale of the terrain. I wanted to give flight telemetry physical permanence.

I built a Python pipeline (AeroMesh) that ingests raw Garmin/ForeFlight KML data, pulls real-world DEM topography via the OpenTopography API, and mathematically calculates exact AGL to engineer its own support pylons for the flight path. It outputs a pre-colored .3mf file ready for multi-color 3D printing (grey for mountains, orange for the flight path).

Up for sale is my Supernote A5 X2 Manta bundle. I bought it a little while ago to read heavy PDFs and stay organized for ground school, but my workflow shifted and it’s basically just been sitting on my desk unused. It’s an incredible device, I just can’t justify keeping it around.

The tablet itself is in absolutely pristine, like-new condition. Zero scratches, no dead pixels, and it’s lived in the protective folio since day one. Just a heads up I don't have the original cardboard factory box anymore, but everything included is flawless.

This bundle comes with two upgraded pens (worth about $150 retail on their own):

Heart of Metal Pen: Black finish, really nice premium weight that feels like a high-end luxury pen.

Lamy EMR Pen: Clear body, super ergonomic and perfect for long writing sessions.

Both offer a massive upgrade over the basic plastic stylus.

Price: $600 OBO

Payment / Shipping (Please read before messaging):

Full disclosure just to save everyone some time: I’m an international student here in the US and don't have a US SSN or ITIN. Because of that, platforms with built-in buyer protection like PayPal Goods & Services or eBay literally will not let me withdraw funds their systems automatically freeze payouts without a US tax ID. Because of that roadblock, I can only do a couple of things:

Local Cash (Preferred): If you're in the Phoenix / Deer Valley area, I’d love to meet up at a coffee shop or a police station safe exchange zone. You can test the screen and both pens yourself before handing over any cash.

Shipped via Zelle: I'm totally open to shipping it out, but I can only accept Zelle since it bypasses that tax ID wall. I know Zelle requires a ton of trust since there's no buyer protection, so I am 100% down to hop on a FaceTime call, send videos of the device working with today's date, or send photos of the receipt while I'm literally at the post office to make sure you feel safe with the deal.

I have a TRMNL e-ink display on my desk, so I spent a weekend building a bridge between the two. Now, my daily health vitals just quietly wait for me when I sit down to work, completely bypassing the mobile app.

How it works under the hood: It uses a Cloudflare Worker to ping the Ultrahuman API, format the JSON, and push it to the TRMNL screen as an ongoing background process.

A few technical hurdles I had to map out:

The "Midnight Gap": Health APIs usually return blank data right after midnight before your morning sync. The script catches this and falls back to yesterday's cache so the screen doesn't just show a bunch of errors at 2 AM.

Historical Bar Charts: The TRMNL screen shows a 7-day step chart. Since the Cloudflare Worker is stateless, it uses Cloudflare KV storage to cache daily data pulls and build the graph history locally.

Self-Healing: It runs a lightweight background audit every 3 days to pull a 7-day historical backfill, catching any data the ring might have synced late.

100% Free: Everything runs on Cloudflare's free tier.

I open-sourced the whole thing. If you happen to have a TRMNL and an Ultrahuman ring, you can spin up your own instance in a few minutes.

https://github.com/Jay9185/TRMNL-ULTRAHUMAN.git

Would love to know what you guys think, or if anyone else here is building cool integrations for e-ink dashboards!