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RLY-8 control over USB

Account cancelled 2018-09-20 00:54:04 1368 Views2 Replies
Hello

I have a problem with controlling this product over USB:
https://www.dfrobot.com/product-1218.html

In the communication protocol PDF, I found the command format. But how do I have to send these commands to the device? I tried it byte after byte starting from the frame head. What are the settings of the serial port (parity, stop-bit etc.)?
Im working on windows on visual studio and made a C#-Project. Here is the necessary code snippet:
Code: Select all
_serialPort = new System.IO.Ports.SerialPort(); _serialPort.PortName = "COM4"; _serialPort.Parity = 0; _serialPort.BaudRate = 115200; _serialPort.StopBits = StopBits.Two; _serialPort.DataBits = 8; _serialPort.ReadTimeout = 50; _serialPort.WriteTimeout = 50; try { _serialPort.Open(); } catch (System.IO.IOException e) { Console.WriteLine(String.Format("Exception with message {0} occured", e.Message)); return; } _continue = true; Console.WriteLine("Type QUIT to exit"); while (_continue) { message = Console.ReadLine(); if (stringComparer.Equals("quit", message)) { _continue = false; } else { byte[] bytestosend = { 0x55, 0xAA, 0x01, 0x02, 0x00, 0x01, 0x00, 0x03 }; _serialPort.Write(bytestosend,0,bytestosend.Length); } }

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2018-09-21 00:42:51 Hi.
I'm sorry to tell you.
Command sending and encoding are not open source. makermuyi

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	_serialPort = new System.IO.Ports.SerialPort();
	_serialPort.PortName = "COM4";
	_serialPort.Parity = 0;
	_serialPort.BaudRate = 115200;
	_serialPort.StopBits = StopBits.Two;
	_serialPort.DataBits = 8;
	_serialPort.ReadTimeout = 50;
	_serialPort.WriteTimeout = 50;

	try {
	_serialPort.Open();
	}
	catch (System.IO.IOException e) {
	Console.WriteLine(String.Format("Exception with message {0} occured", e.Message));
	return;
	}
	_continue = true;

	Console.WriteLine("Type QUIT to exit");

	while (_continue) {
	message = Console.ReadLine();

	if (stringComparer.Equals("quit", message)) {
	_continue = false;
	}
	else {
	byte[] bytestosend = { 0x55, 0xAA, 0x01, 0x02, 0x00, 0x01, 0x00, 0x03 };
	_serialPort.Write(bytestosend,0,bytestosend.Length);
	}
	}