A complete single-board computer based on ATSAMD51J20A (ARM Cortex-M4) microcontroller and consists of LCD, 40 keys mechanical keyboard, speaker, microSD card slot, USBC connector, three ports of ESD protected GPIOs, optional battery (flat or 18650).

Initially, this platform was developed to get instant access to serial buses - I2C, SPI, and UART. Also, I used it for rapid firmware development since it runs a FreeRTOS-based shell with access to real-time peripherals yet has high-level services like CLI, SD FAT access, scripting, etc.

Although there are many ARM Cortex-M4 development boards and evaluation systems, they all demand a PC to be programmed and managed. At the same time, Rimer SBC provides you with instant access to all chip peripherals directly from the board.

Refer to Hackaday Project Page for more information.