Label2.Text = "Sent: " + richTextBox2.Text Private void button2_Click(object sender, EventArgs e) Label1.Text = "The Following Exception Took Place\n"+ex.Message RichTextBox4.Text = sp2.ReadExisting().Trim() Label1.Text = "Sent: " + richTextBox1.Text Private void button1_Click(object sender, EventArgs e) Private void si_DataReceived(string data) This.BeginInvoke(new SetTextDeleg(si_DataReceived), new object ) Void sp_DataReceived(object sender, SerialDataReceivedEventArgs e) Sp2.DataReceived += new SerialDataReceivedEventHandler(sp_DataReceived) Private void Form1_Load(object sender, EventArgs e) Private delegate void SetTextDeleg(string text) only ReadExisting works but it doesnt read the entire data sent, it sometimes reads a charecter, two or a collection but not the whole + it always ignores the first charecter sent if by chance it read the whole string.
Hey i've tried the code but i'm facing some problemsĪll types of the read mathods (readline,read.etc) throws a timeout exception.
In serial communications, it's the designers responsibility to handle data errors, incomplete data, and multiple messages in one receive events. Be prepared for additional events or even the posibility that not all the data will be received.
If you have not created a recognizable data packet to determine if data has been completely recovered, you may not have all the data. Note: The event will be triggered when the first byte arrives. buffer when the data when you are finished recovering the data. You will have to handle buffer overflow conditions and clean up the Received data will be in placed into ReceiveBuffer at location offset. Private void ProcessReceivedData(object sender, SerialDataReceivedEventArgs e) Handler as indicatted above will be run when the event is triggered. Sp.DataReceived += new SerialDataReceivedEventHandler(ProcessReceivedData) Subscribe to serial data received event to trigger event when data arrives on the port
Subscribe to the SerialDataReceivedEvent and Windows will trigger that event when something arrives at the port. There's no reason to run a loop to recover data from the serial port. How Can i make the read process automatic without the need to invoke readline manytime() ? this always gives Timeout exception when talking with the reader when infact there is data recieved and it was read by a Serial Port monitor !!!
The problem the serialMonitor rogram for the serial port detects and reads the data correctly, so why isn't the program.Ä¢ - Also how can i make the reading take place automatically without requiring me to invoke readline() every time, i mean to make the availability of data to be read invoke an event handler? Now I'm trying to connect to an "Advanced ID ST500 RFID Reader" the program sends the data normally and it is recieved by the reader correctly but when receiving the program throws a Timeout exception even for timeouts of 10 seconds.
1 - I have a problem with the serial port, i wrote a simple program to chat betwen 2 PC and it worked perfectly.