基于串行通讯的PLC远程控制，详细描述了如何通过rs232跟PLC远程通讯，比较实用。-Based on Serial Communication PLC remote control, described in detail with the PLC through the RS232 remote communication, more practical.

An RS232 port controls a TSA5512 via a PIC16F84 This allows a TV tuner to be scanned across its full range. 4MHz crystal for the PIC, the tuner has it s own internal crystal. Use a MAX232 for level shifting. SCL RB6 SDA RB5 Din RA1 Dout

串口发送接收，随时发送，通过1602屏显示数据，实时发送可以发送任何数据。-I can