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1 How do I perform a loopback test with my serial adapter configured for 2-wire RS-485?

2-wire RS-485 connects the transmitter and receiver to the same data channel. Many applications are not designed to receive the same data they are transmitting and expect the serial port to be set to ‘No Echo’. Therefore, when the serial port is transmitting…

2 How to change asynchronous serial COM Port assignments in Sealevel’s Port Manager or Advanced Ports Utilities

Sealevel recommends using the installed COM numbers if at all possible to avoid system conflicts. If you previously installed a USB or PCMCIA serial interface, it will still have resources that have been assigned by the operating system. If the device is…

3 How to change asynchronous serial COM port assignments in Windows Device Manager

Sealevel recommends using the installed COM numbers if at all possible to avoid system conflicts. If you previously installed a USB or PCMCIA serial interface, it will have resources assigned by the operating system. If the device is not currently connected…

4 How to configure UART-based serial adapters in Linux

Linux supports the direct use of 16CXXX UART-based devices with drivers included in the kernel sources. Some Sealevel asynchronous serial devices do not currently have their vendor/product IDs included in this driver. It is necessary to either manually identify…

5 How to configure USB serial adapters in Linux

The serial USB driver in Linux contains many product IDs for Sealevel devices. However, the newest devices may not be currently included in the driver. This guide consists of example USB device installation instructions using either driver load time parameters…

6 How to fix "crazy mouse" syndrome with USB serial adapters

Overview This condition is potentially encountered in Microsoft Windows when connecting a serial GPS device to a serial port. It is caused when the NMEA 0183 GPS serial data is misinterpreted as mouse data by the serial port enumerator (serenum.sys), resulting…

7 How to integrate the 2107 USB to serial adapter into your RS-485 network

The 2107 is designed for two-wire (half duplex) RS-485 applications and provides reduced wiring costs and protection against EMI and other induced line noise. To integrate the 2107 with your RS-485 network, start by installing the 2107 per the instructions…

8 Overview of Serial Communication Standards

Asynchronous Communications Overview Asynchronous communications is the standard means of serial data communication for PC compatibles and PS/2 computers. Serial data communications implies that individual bits of a character are transmitted consecutively…

9 SeaI/O RS-232 Communication via Bluetooth

Bluetooth Communication Communicating via wireless connection has become commonplace in the 21st century. Cell phones, laptops, PDAs and other electronics constantly remind us of this trend. As this capability has become more widespread, so has the desire…

10 Test Report: USB to Serial Adapter Designs

Impact of Architecture on Performance of USB to Serial Adapters "We were stunned at the performance difference between brands of multiport USB to serial adapters." Design architecture is the critical element. Findings There is a significant difference in…

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