User's Guide

AT commands Diagnostic commands
XBee/XBee-PRO S2C 802.15.4 RF Module User Guide
103
Default
Set in firmware
DB (Last Packet RSSI)
Reports the RSSI in -dBm of the last received RF data packet. DB returns a hexadecimal value for the -
dBm measurement.
For example, if DB returns 0x60, then the RSSI of the last packet received was -96 dBm.
If the XBee/XBee-PRO S2C 802.15.4 RF Module has been reset and has not yet received a packet, DB
reports 0.
This value is volatile (the value does not persist in the device's memory after a power-up sequence).
Parameter range
0 - 0xFF [read-only]
Default
N/A
EC (CCA Failures)
ReSets or displays the count of Clear Channel Assessment (CCA) failures. This register increments
when the device does not transmit a packet because it detected energy above the CCA threshold level
set with CA command. This count saturates at its maximum value. Set the count to zero to reset the
count.
Parameter range
0 - 0xFFFF
Default
N/A
EA (ACK Failures)
Resets or displays the count of acknowledgment failures. This register increments when the device
expires the retries without receiving an ACK on a packet transmission. This count saturates at its
maximum value. Set the count to zero to reset the count.
Parameter range
0 - 0xFFFF
Default
N/A
DD (Device Type Identifier)
Stores the Digi device type identifier value. Use this value to differentiate between multiple XBee
devices.
If you change DD, RE (Restore Defaults) will not restore defaults. The only way to get DD back to
default values is to explicitly set it to defaults.