Work with networked devices Test links between adjacent devices
XBee®/XBee-PRO SX RF Module User Guide
163
Associate LED
The Associate pin (pin 28) provides an indication of the device's sleep status and diagnostic
information. To take advantage of these indications, connect an LED to the Associate pin.
To enable the Associate LED functionality, set the D5 command to 1; it is enabled by default. If
enabled, the Associate pin is configured as an output. This section describes the behavior of the pin.
The Associate pin indicates the synchronization status of a sleep compatible XBee/XBee-PRO SX RF
Module. If a device is not sleep compatible, the pin functions as a power indicator.
Use the LT command to override the blink rate of the Associate pin. If you set LT to 0, the device uses
the default blink time: 500 ms for a sleep coordinator, 250 ms otherwise.
The following table describes the Associate LED functionality.
Sleep
mode LED status Meaning
0 On, blinking The device has power and is operating properly
1, 4, 5 Off The device is in a low power mode
1, 4, 5 On, blinking The device has power, is awake and is operating properly
7 On, solid The network is asleep, or the device has not synchronized with the
network, or has lost synchronization with the network
7, 8 On, slow blinking
(500 ms blink time)
The device is acting as the network sleep coordinator and is
operating properly
7, 8 On, fast blinking
(250 ms blink time)
The device is properly synchronized with the network
8 Off The device is in a low power mode
8 On, solid The device has not synchronized or has lost synchronization with the
network
Diagnostics support
The Associate pin works with the Commissioning Pushbutton to provide additional diagnostic
behaviors to aid in deploying and testing a network. If you press the Commissioning Pushbutton once,
the device transmits a broadcast Node Identification Indicator (0x95) frame at the beginning of the
next wake cycle if the device is sleep compatible, or immediately if the device is not sleep compatible.
If you enable the Associate LED functionality using the D5 command, a device that receives this
transmission blinks its Associate pin rapidly for one second.
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