As I'm writing this, my 2-days-old Ender 3 v2 is printing the second version of an enclosure for the project. A very bulky enclosure for the first prototype.

The first enclosure, or frame really, had a few issues so some very ungraceful adjustments were made with a Dremel, the resulting assembled prototype looks like this (printed in PLA):

Under the hood (if there was one), I have a:

• Monochrome 0.91" 128x32 I2C OLED Display
• Adafruit LTR390 UV Light Sensor
• Adafruit QT Py M0 - SAMD21 Dev Board

The latter is tucked under the OLED display with USB-C port facing out. As you can see, all of these are currently connected with JST connectors, leveraging STEMMA QT - first time trying this out but seems to work great for quick prototyping.

On the software side, I tried CircuitPython - however it constantly complained about lack of memory, space and everything else so I've switched to the good old trusty Arduino IDE, however the library for the LTR390 sensor definitely needs some love as I had to port some helpers over from the Python lib.

In summary, this is nowhere near a comfortable wearable device and closer to a plug-in smartphone accessory (and an ugly one at that), so there's lots of work ahead!

The next steps? I'm gonna continue iterating on the enclosures for current setup to get confident with CAD/3D modelling again and progress to adding a charging circuit and a battery and see how they can all best fit. And then? Then it's time to tear it all apart again, cause we want to make things smaller. Waaaay smaller.