There are only a few cases where you would want to change a COM number assignment. Your application only works at COM1 through COM4 and…
What are some common concerns when installing serial cables?
Make sure connections are clean and secure and thumbscrews are tightened If running long distances, choose a low capacitance cable Avoid running communication cables near…
How does the Sealevel SeaCOM serial driver differ from the Microsoft serial driver?
The SeaCOM serial driver looks exactly like the Windows driver to your application. SeaCOM uses the same API and calls as the Microsoft driver. However,…
Why do I need to connect a ground line when using RS-422 or RS-485 communications?
By connecting the ground wire, you avoid potential communication problems. Differential serial communications such as RS-422 and RS-485 use the ground as a reference.…
I am using a Sealevel GPS modified board. How do I set the data rate?
The GPS modified boards are designed to work primarily with the Rockwell Collins GPS receiver with a data rate of 76.8 Kbps. The modification…
Do Sealevel products support interrupt sharing with other devices?
Yes. The Sealevel SeaCOM serial driver fully supports interrupt sharing. There are however a couple of points to mention. All Sealevel PCI serial cards fully…
Do I need to terminate modem control signals if I’m not using them?
It is always a good idea to terminate any unused signal lines. Floating signals can generate interrupts and drastically degrade system performance. The Sealevel SeaCOM…
What is the maximum distance I can communicate using a standard RS-232 serial cable?
Practically, it depends on your application and environment. The RS-232 standard specifies transmitting data up to 50 feet at 9600 bits per second (bps).
Do you have sample Windows programs for writing to a serial port?
We offer serial programming samples with source code in the archive link below. Examples of programming samples include: a simple terminal program; a program…