DB9 connectors are not exactly breadboard / perfboard friendly. Fortunately, BCRobotics has the answer!
This simple breakout board gives you a simple breadboard / 0.1″ / 2.54mm pitch compatible platform to work with standard female DB9 connectors.
Male connectors will also fit but the pin numbers will not be correct - grab the male version instead!
Please Note: This breakout does not include the female connector