AT commands Diagnostic commands
XBee®-PRO 900HP/XSC RF Modules
81
DB only indicates the signal strength of the last hop. It does not provide an accurate quality
measurement for a multihop link.
If the XBee-PRO 900HP 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
0
ER (Received Error Count)
This count increments when a device receives a packet that contains integrity errors of some sort.
When the number reaches 0xFFFF, the firmware does not count further events.
To reset the counter to any 16-bit unsigned value, append a hexadecimal parameter to the
ERcommand.
Parameter range
0 - 0xFFFF
Default
0
GD (Good Packets Received)
This count increments when a device receives a good frame with a valid MAC header on the RF
interface. Received MAC ACK packets do not increment this counter. Once the number reaches
0xFFFF, it does not count further events.
To reset the counter to any 16-bit unsigned value, append a hexadecimal parameter to the command.
This value is volatile (the value does not persist in the device's memory after a power-up sequence).
Parameter range
0 - 0xFFFF
Default
0
EA (MAC ACK Failure Count)
This count increments whenever a MAC ACK timeout occurs on a MAC-level unicast. When the number
reaches 0xFFFF, the firmware does not count further events.
To reset the counter to any 16-bit unsigned value, append a hexadecimal parameter to the command.
This value is volatile (the value does not persist in the device's memory after a power-up sequence).
Parameter range
0 - 0xFFFF
Default
0
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