E-paper Display
SSD1680/1681 EPD gives crisp, high-contrast readouts in full sunlight without any backlight drain. Screen content persists with zero power — perfect for always-on speed and session data.
u-blox M9 / M10 GPS
Professional-grade GNSS chip with multi-constellation support and up to 20 Hz position updates. Full UBX binary protocol gives sub-metre accuracy and raw measurement access for post-processing.
Pure C Firmware
Written entirely in C99 on ESP-IDF — no RTOS overhead from managed runtimes, no garbage collection pauses. Interrupt-driven I/O and poll-free sensor access keep latency predictable at every sample rate.
