C# find available serial port

The delegate is used to write to the UI thread from a non-UI thread. We can now receive data from a serial port device and display it on a form. Some devices will send data without being prompted. However, some devices need to be send certain commands, and it will reply with the data that the command calls for.

For these devices, you will write data to the serial port, and use the previous code to get the data that will be sent back.

In my example, I will be communicating with a scale. This command is specific for this scale. You will need to read the documentation of your serial device to find commands that it will receive. To write to the serial port, I have created a "Start" button on the form. And that is all you need to do. I have attached the Visual Studio solution. How to receive data from com port.

Thanks in advance. Please help me. Does it need all ping or which pings need mainly to receive and send data from computer and other device. Its always wise to make connection on demand when needed always without unnecessarily keeping a connection open, unless some exceptional cases.

Hi i have a problem with communicating with a serial scale. If i use ReadLine i get no values, but if i use ReadExisting i get a constant string for e. I have problem, it seems like i have nothing to read, it is always stuck here while SerialObj. Parse textBox2. Write takes either a string or a buffer of data. Length ; serialPort1. Length ; i basicaly send 12 or like this values on microcontroller but at recieving side i cant recieve respective value so plz guide me. I want to write a program in c that print papers with Olivetti pr4sl slip printer.

Please help me how i can do. By SerialObj. DiscardInBuffer ; you are flushing data in the Serial Port buffer only. Data still remains in the base stream object, which will pop up on reading the port.

Can u tell me how to code a program to record the exact time when serial port data arrives in visual studio in C. This site uses Akismet to reduce spam. Learn how your comment data is processed. Sandip Shinde NetSolution Technogies. Maybe you should write a little bit about the SerialObj and tmrComm, where did they came from?? Hi Rana, Do you have a complete code rather than bits and pieces?

Can we use serial port communication with AVR micro-controller? I am using WPF. Can you to get punch in and out data from PunchMachine using above code. Regards, Abhi. The docking stations both use the same peripherals, all plugged into the same USB ports.

Initializes a new instance of the SerialPort class using the specified port name, baud rate, parity bit, and data bits.

Initializes a new instance of the SerialPort class using the specified port name, baud rate, parity bit, data bits, and stop bit. Gets the underlying Stream object for a SerialPort object. Gets the IContainer that contains the Component. Gets a value that indicates whether the Component is currently in design mode. Gets or sets a value indicating whether null bytes are ignored when transmitted between the port and the receive buffer.

Gets the list of event handlers that are attached to this Component. Gets or sets the handshaking protocol for serial port transmission of data using a value from Handshake. Gets a value indicating the open or closed status of the SerialPort object. Gets or sets the value used to interpret the end of a call to the ReadLine and WriteLine String methods. Gets or sets the size of the SerialPort input buffer.

Gets or sets the number of milliseconds before a time-out occurs when a read operation does not finish. Gets or sets the number of bytes in the internal input buffer before a DataReceived event occurs. Gets or sets a value indicating whether the Request to Send RTS signal is enabled during serial communication. Gets or sets the ISite of the Component. Gets or sets the number of milliseconds before a time-out occurs when a write operation does not finish. Closes the port connection, sets the IsOpen property to false , and disposes of the internal Stream object.

Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object. Releases all resources used by the Component. Releases the unmanaged resources used by the SerialPort and optionally releases the managed resources. Retrieves the current lifetime service object that controls the lifetime policy for this instance. Returns an object that represents a service provided by the Component or by its Container.

Gets the Type of the current instance. Creates a shallow copy of the current Object. Creates a shallow copy of the current MarshalByRefObject object. Reads a number of bytes from the SerialPort input buffer and writes those bytes into a byte array at the specified offset.

Reads a number of characters from the SerialPort input buffer and writes them into an array of characters at a given offset. Synchronously reads one byte from the SerialPort input buffer. Synchronously reads one character from the SerialPort input buffer. Reads all immediately available bytes, based on the encoding, in both the stream and the input buffer of the SerialPort object.

Reads up to the NewLine value in the input buffer. Reads a string up to the specified value in the input buffer.