STM32实时时钟作为定时器，通过串口线与计算机相连接，在电脑端打印当前的时间信息，每一秒更新一次。-STM32 Real-time clock as a timer, via serial cable connected to the computer, the computer terminal prints the current time information is updated once every second.

si4463+stm32源码，传输距离为2000米。 这个为终端程序，包含发送和接受。-Si4463+stm32 source code, the transmission distance is 2000 meters. This is a terminal program, including sending and receiving.