2026-05-31 (Su) SubdermalDuino Notes for the next REV

The unit I assembled was fragile, so I adhered the components together with double-sided tape. The device was much easier to handle, and since the parts were not flopping around, it should be less stressful on the wires and solder joints. The most important part of the day's work was finding raw text I could send to the microcontroller via Bluetooth to control the LEDs. I dug into the sketch and found that "B" followed by an integer controlled the brightness. It had to be a capital letter, and when I sent data, it would interpret the following character as an integer, so "B0" set the intensity to 48. I referenced an ASCII table to find the lowest number I could type, which was a space (32). I also discovered that if I sent "B" without a follow-up, it would set the brightness to 10, which corresponded with a newline character. I kept notes of my findings and thoughts about future REVs. I have a lot of work to make this a decent product, and I can learn a lot, but I also have no experience with the device under my skin.

Adhered module and notes

The rest of the posts for this project have been arranged by date.
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2026-05-27