User's Manual Part 1

BL-521 r7 QSG.doc © Copyright Brainboxes Limited 2003 Page 8 of 8
4.2 Physically connecting your device to BL-521 via the RS232 connector
The female connector is designed so that it can be plugged directly into a PC’s standard COM port.
The Female to Male “Gender Changer” allows maximum cabling flexibility where existing cabling is already
attached.
If you are connecting it directly to a different device you may need an additional cable, such as a “cross-over” or
“null-modem” cable. Please refer to your device’s documentation for further details.
3.2. Connecting to BL-521 using a Brainboxes Bluetooth product.
There are many different scenarios whereby a connection can be made to a BL-521 and consequently its attached
device. The application scenarios will also depend on what sort of device you have attached to the BL-521. One
worked example is shown here for illustrative purposes, but the principle will be the same regardless of the device
you are connecting to excepting perhaps the cabling arrangements your device might require.
In this example we have connected a Tektronix TDS220
Oscilloscope to a BL-521 and plugged in the power
adapter included. No additional cables or gender changers
were used in this application. In order to communicate to
the scope/BL-521 we have connected a Brainboxes USB
adapter (Order code BL-554) to a laptop with Brainboxes
Bluetooth software suite installed. If you are connecting to
BL-521 with a different manufacturers Bluetooth product,
please refer to the manufacturers instructions for that
product.
Broadly, this process requires the following steps that are detailed below.
1 - Discover the device
2 - Secure the relationship
3 - Connect to the profile
4 - Connect your application to the COM port.
Pinouts for standard cable
Pinouts for supplied gender changer