USART： 串口打字机（将接收到的数据原样输出） PCF8563定时，利用串口将时间传至PC 24C01读写，利用串口将结果传至PC DS18B20检测温度，利用串口将结果传至PC-USART: Serial typewriter (the received data is output) PCF8563 timing, use of the time spread PC 24C01 serial read and write, using the result

用485总线进行传输数据，ds18b20测量温度，通过485总线传到主机(Using 485 bus to transmit data and measure temperature)