serial-port

问题 I have a netcore app that opens the serial port, and writes "parity error" on the console once a parity error gets detected. It works fine in Windows 10 but can't get it to work under Linux. My assumption is that the OS is not passing the parity error to netcore. For checking the port settings I run: stty -D /dev/ttyS0 -ignpar inpck then I run: stty -D /dev/ttyS0 -a and the settings seem to be properly set (-ignpar inpck) as expected. Then I run my netcore 3 app but parity error is not

问题 I'm currently working on IO board. The serial object has been initialized and listen for incoming data. I'm reading incoming data using SerialPort1.ReadExisting(); as the incoming string expected to arrive as {X000000}5E + \r\n in every reading. private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e) { try { TextBox2.Invoke(new EventHandler(delegate { TextBox2.AppendText(SerialPort1.ReadExisting()); })); } catch { MessageBox.Show("Couldn't open Port

问题 I want to send some serial values to my PC. Arduino with sensors (master) >> via Bluetooth >> Arduino (slave) >> via serial com port >> PC with C# app Serial transmission works well from master to slave, but how can I receive and convert the values received to floats on the PC side using C#? Slave code is: Struct definition typedef struct { char bt1; float bt2; float bt3; float bt4; float bt5; float bt6; float bt7; char bt8; } PayloadBT; PayloadBT payloadBT; Struct sent to pc BT_writeAnything

问题 I am making a connection with python using pyserial with a UART port. As I send the command using serial.write my output is received but my serial port does not break connection. As I need to send a second command also to receive the output. Please guide me on this. I have also used ser.close still I am not able to close the port. import serial ser = serial.Serial( port='COM5', \ baudrate=9600, \ parity=serial.PARITY_NONE, \ stopbits=serial.STOPBITS_ONE, \ bytesize=serial.EIGHTBITS, \ timeout

问题 I am making a connection with python using pyserial with a UART port. As I send the command using serial.write my output is received but my serial port does not break connection. As I need to send a second command also to receive the output. Please guide me on this. I have also used ser.close still I am not able to close the port. import serial ser = serial.Serial( port='COM5', \ baudrate=9600, \ parity=serial.PARITY_NONE, \ stopbits=serial.STOPBITS_ONE, \ bytesize=serial.EIGHTBITS, \ timeout

问题 This question already has answers here : QSerialPort is causing a program stop (endless loop?) if opening device (2 answers) Closed 3 years ago . I have an application (using QSerialPort ) that reads and writes from a serial port. When I run this application as the root user, then run it again as a non-root user, I am no longer able to write to the serial port, receiving the following error: QIODevice::write (QSerialPort): device not open The non-root user is in the dialout group, and the

问题 I am quite frustrated at this point, and I thought I would post this as a last resort. I am in the process of developing a C# .NET 4.5 app that will communicate via USB to a Moneris payment device. Its a Moneris ICT-250 and Moneris refers to this as a "semi-integrated" application. I have been trying to send over a test payment to get the device to work using the Serial Port class but nothing seems to be working. For starters, Moneris does provide a simulator to get up and running. I can

问题 i am opening a USB device: for communication using CreateFile : HANDLE hUsb = CreateFile("\\.\LCLD9", GENERIC_READ | GENERIC_WRITE, 0, null, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0); The call succeeds (i.e. hUsb is not equal to INVALID_HANDLE_VALUE). But then it comes time to do what we do with every serial port: SetupComm (set receive and transit buffer sizes) SetCommState (set flow-control, baud rate, etc) SetCommTimeouts (set timeouts) Each of these calls with GetLastError code of 1 . E.g.:

问题 i am opening a USB device: for communication using CreateFile : HANDLE hUsb = CreateFile("\\.\LCLD9", GENERIC_READ | GENERIC_WRITE, 0, null, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0); The call succeeds (i.e. hUsb is not equal to INVALID_HANDLE_VALUE). But then it comes time to do what we do with every serial port: SetupComm (set receive and transit buffer sizes) SetCommState (set flow-control, baud rate, etc) SetCommTimeouts (set timeouts) Each of these calls with GetLastError code of 1 . E.g.:

问题 I am quite frustrated at this point, and I thought I would post this as a last resort. I am in the process of developing a C# .NET 4.5 app that will communicate via USB to a Moneris payment device. Its a Moneris ICT-250 and Moneris refers to this as a "semi-integrated" application. I have been trying to send over a test payment to get the device to work using the Serial Port class but nothing seems to be working. For starters, Moneris does provide a simulator to get up and running. I can