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modbus_RS232_RS485_COL
- 串口通过modbaus协议控制继电器,读取开关输入的PC上位机源程序-Serial control relay through modbaus agreement, read the PC host computer switch input source
CTestCom485
- 两路继电器开发板485转232串口通信程序代码-Two-way relay boards 485 to 232 serial communication code
comContral
- 485串口控制8路继电器开关控制,可以选择串口号,控制那路开关。-8 serial port control 485 relay switch control.