顾客显示屏控制的原理比较简单：

1.打开顾显的串行口 2.设置波特率，这个波特率需要与顾显的一致 3.使用ESC/POS指令进行数据传输。

要结合“EPSON/POS指令集封装-Customer display control principle is simple: 1. Open care showed the serial port 2. Set the baud rate, the baud rate was the same needs and care 3. Using ESC/POS commands for data transfer. In connection with the " EPSON/POS command set package