These are sold all over the web under many different brand names. JUst make sure it looks like this:
E.g:
You need some wires, soldering equipment, a computer and so on. Notable you don't actually need a 3D printer. Those can often be found in maker spaces or at some friend's house.. or a commercial printing service.
All development was done on a breadboard, a Pico with headers solder on, and a smaller OLED display with the same resolution.
This repo is organized into a few folders for the hardware and software side of things.
hardware contains the stl files for 2 different versions of the case. Both cases print with n supports just fine on my dirt cheap Ender 3 printer using the cheapest PLA I had. The Pico and screen are both fastened using guide-pegs and hot glue so they don't rattle loose over time. The cases are both assembled just by interference fit. No fastners or adhesives needed. The fit is a bit tight but once snapped into place they are not likely to come loose.
The V3 case has the USB power connector on the right side. This is the smaller, easier to both print, and to assemble.
The V2 case has the USB power connector at the back and is therefore a bit larger.
Both cases are intended for desk/table use. No wall mounting case at this time.
(The version 1 case looked like the v2 but with a fully vertical front)
micropython contains the software that runs the device after installing micropython on the Pico.
micropython/upydexcom is a port of the Pydexcom project to run on a Micropython device. This is also available as fork called UPydexcom project
micropython/config.example.pyis intended to be renamed toconfig.pyand should contain your wifi and Dexcom login information.micropython/main.pysupports two kinds of screen drivers. My small dev screen needed a different driver from the bigger screen used in the final device. Depending on the screen you connect, you may need to comment/uncomment the screen setup near the top of the file. I plan to extract this into more clean import files.
- Pico W Pinout
- Pydexcom project
- Micropython docs
- Micropython "standard" library
- Micropything programming for screens
- Display driver SH1106
- Display driver SSD1306 (might actually be shipped with Micropython)
- Debugging memory usage
- Huge library of pixelfonts that are good for use with screens like this
- Options for powering the Pico
more to come...