Com porta serial timer

Please Sign up or sign in to vote. See more: serial-port. Hi guys, i wrote a code about serial port communication and i wanna use timer because i i should read the sentdata continuously without missing any data. Read and write data are in the same code. I open interface 2 times and after clicking start button , i clicked send button.

The data is starting to send and at the same interface the data is receiving also i set up the received time interval is and the send time interval is but i still miss a data. Also sometimes there can be a lag in code. Where is my fault? Probably there is a something wrong in while but I'm not sure. I m waiting for your answers. Sorry for my English. What I have tried:. Copy Code.

Posted Jul am JohnOz. Add a Solution. Top Rated Most Recent. Accept Solution Reject Solution. Why are you using a timer for reading? For the Transmission Control Protocol and the User Datagram Protocol, a port number is a bit integer that is put in the header appended to a message unit. A COM3 or Communications 3 port is a communications channel on the computer that is used to transmit data from hardware devices connected to the PC to the processor.

You will see a list of the USB ports installed on your computer. To see if this is the problem and hopefully fix it , try changing the assigned COM port. If you are using a serial port built into the computer, it will be listed as a "Communications Port ". Serial port. An asynchronous port on the computer used to connect a serial device to the computer and capable of transmitting one bit at a time.

Right click on the Device and click on Properties. Click on the "Port Settings" tab. Pull down the scrollbar and select COM1. Now on the right panel, you can see the key ComDB.

In value Data section select all and delete reset to zero 0 Close the registry editor and then restart your computer. An Asynchronous port on the computer used to connect a serial device to the computer and capable of transmitting one bit at a time.

Step 2: Type netstat -ano to list states of all ports. Step 3: Locate to the target port and view the corresponding PID in the final column.

Loading cart contents View Cart Checkout Cart subtotal: …. In Control Panel, make sure you are in Classic View. WriteMessage Chr oCP. Length End Sub ' This function returns an integer specifying the number of bytes ' read from the Comm Port. It accepts a parameter specifying the number ' of desired bytes to read. Follow Post Reply. I have played with the serial port but What I used was by the event.

I did not use a timer. I dont know if this is relevant for you or not? ReadLine I played with this to hook a barcode scanner and throw the readings into a text box. Miro cmdolcet69 wrote: This code below write a serial command to the com port then read the results and disaplays it into the label1. I think the code above only apply to vb , have you ever done anything in vb I know i have read in a couple of places that serial COM is very weak in Please confirm that the code above is for or It was for But out of the express : so if you need to write a quick dummy app I have never played with