发送邮件，也可以发送消息，简单，清晰，易于-Transmitter mail, can send messages, simple, clear, easy

通用异步收发传输器（Universal Asynchronous Receiver/Transmitter)，通常称作UART，是一种异步收发传输器，是电脑硬件的一部分。将资料由串行通信与并行通信间作传输转换，作为并行输入成为串行输出的芯片.-This is the code of UART.Universal Asynchronous Receiver/Transmitter

arduino code receiver and transmitter with arduino and rf mudole