Specifications

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First Step - Get The Drivers
The USB-RLY08 module uses the FTDI FT232R USB chip to handle all the USB protocols. The
documentation provided by FTDI is very complete, and is not duplicated here. Before using the
USB-RLY08, you will need to install FTDI's Virtual COM Port ( VCP ) Drivers. These drivers
appear to the system as an extra Com Port ( in addition to any existing hardware Com Ports ).
Application software accesses the USB device in the same way as it would access a standard
Windows Com Port using the Windows VCOMM API calls or by using a Com Port
Library. Drivers are available for Windows, Apple, Linux and Open BSD systems directly from the
FTDI website. You should get and install the drivers now, before you connect the USB RLY08 to
your computer. The Drivers page is here.
Which COM port?
After installing the drivers, and plugging in the USB-RLY08 module to a spare USB port, you will
want to know which COM port it has been assigned to. This will vary from system to system
depending on how many COM ports you currently have installed. To find out where it is, right click
on your "My Computer" desktop icon and select the "Device Manager" tab. Now scroll down and
open the "Ports (COM & LPT)" tab. You should see the USB serial port listed - COM2 in the
example below. If you want to change the COM port number - just right click on it, select
properties, select advanced and select the COM port number from the available list. The COM
port should be set up for 19200 baud, 8 data bits, no parity and two stop bits.