Introduction - If you have any usage issues, please Google them yourself
STM32 control board (own design), the main features include: GPS data acquisition, LED display switch interrupt, digital control, USB (using serial RS232 protocol, the circuit design of the corresponding conversion), Hall sensor input, SPI memory specific code FLASH expansion, relays and real-time clock function. By writing a specific library, give you a reference (note: all the underlying code libraries written for the circuit) PC-free section