https://www.cnx-software.com/2021/06/09/izirun-open-hardware-stm32-development-boards-expose-gpios-through-m-2-connector/
IZIRUN open-hardware STM32 development boards expose GPIOs through M.2 connector (Crowdfunding) -...
Jun 9, 2021 - M.2 sockets are typically used to connect wireless or storage expansion boards to laptops, computers, and SBC's. But nothing precludes them from being
stm32 development boards