wittch-sense/datasheets/README.md

Adafruit Qt Py

• https://github.com/adafruit/Adafruit-QT-Py-PCB
• https://github.com/adafruit/Adafruit_CAD_Parts/tree/main/4600%20QT%20Py

SAMD21

• https://cdn-learn.adafruit.com/assets/assets/000/044/363/original/samd21.pdf

GD25Q16

• 2MB SPI Flash in 8-Pin SOIC package
• https://cdn-shop.adafruit.com/product-files/4763/4763_GD25Q16CTIGR.pdf