Link to the pin out of the bottom connector:
https://www.unihiker.com/wiki/board-overview
Looks like a neat board, I could see making expansion modules that plug into the bottom and running like a IR blaster or other stuff off the SPI/UART bus.
https://www.unihiker.com/wiki/board-overview
Looks like a neat board, I could see making expansion modules that plug into the bottom and running like a IR blaster or other stuff off the SPI/UART bus.
They really bury the lede here, awesome that there is already an ecosystem that exists for the edge connector.
Edge Connectors Pin numbers are compatible with micro:bit, 19 independent I/O (Support 1 ×I2C, 1×UART, 2×SPI, 6×12-bit ADC, 5×10-bit PWM)
https://www.unihiker.com/wiki/specification
Note: The edge connector on the back has no electrical connection.