SmartPen LAB STARS

https://github.com/AthemiS13/smart-pen

SmartPEN is a highly compact and innovative pen-sized device featuring a slim OLED screen, powered by an ESP32-S3 microcontroller and a LiPo battery with USB-C charging. The standout feature is its discreet control system—a heavy-duty switch with a 700g trigger force, placed under the pen cartridge for subtle, intentional interaction. This enables users to scroll through and display custom text sent via Bluetooth, offering seamless information access in the smallest possible form factor, just 13 millimeters thick. The project aims to combine minimalism and functionality.

Note: Current pin used for battery voltage monitoring doesnt support ADC measurements, so I had to hook it up manually to the TCH pin.