How XBee modules control devices

There are many reasons to create a sensor network—that is, to collect data from multiple nodes and bring it to a central location. There are also many reasons you may want to take remote commands from a central location and create real events in multiple physical locations.

An XBee module is capable of receiving commands that set its digital and analog output pins to trigger real-world events without the use of an external microcontroller. By itself, an XBee device can power an LED, sound a small buzzer, or even operate a tiny motor. If you use a relay, you can operate many more devices directly from the XBee module.