How to use a XBee module?

First you will have to configure it. The easiest way of doing so is following these steps:

1. Download the configurator GUI: Digi X-CTU download
2. Install and open X-CTU
3. Select the Com Port.
4. Open the "Modem Configuration" tab.
5. Click on Read.
6. You'll have to set one of your XBee modems as a "COORDINATOR AT" in the dropdown list "Function Set".
7. Click on the "Write" button
8. Leave the rest of the modems as "ROUTER/END DEVICE AT"
9. Now your Coordinator will transmit to the rest of the modules