Sentinel Data Logger

STM32G474 Microcontroller The MCU of the SDL board is an STM32G474, chosen for its extensive peripheral set and processing headroom. With multiple SPI and I²C interfaces, DMA support, and high clock speed, it can handle several sensor streams simultaneously while maintaining precise timestamping for logged data. The STM32 ecosystem and tooling also make firmware development and debugging straightforward during early prototyping.  ICM-42670-P BMI088 Multiple IMUs (BMI088 + ICM

The Sentinel Data Logger (SDL) began as a compact avionics platform designed to capture high-resolution flight data during experimental rocket launches. Early in development, the focus was on building a robust hardware foundation capable of recording multiple synchronized sensor streams while remaining reliable in the harsh conditions of rocket flight. The board integrates an STM32-based microcontroller with several onboard sensors—including inertial measurement units and bar