Db (Received Signal Strength) - Digi XBee XTC User Manual

Radio frequency module
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The conversion of the hex value returned by %V to Volts is VAL/65536 = Volts.
Example:
2.8 VDC = 2.8 * 65536 = 0x2CCCD
3.3 VDC = 3.3 * 65536 = 0x34CCD
Sample output
3.27 V (when CF = 0)
345E3 (when CF = 1)
3.27 (when CF = 2)
Binary command
0x3B (59 decimal)
Parameter range
(read-only):
0x26666 - 0x39999 (2.40 to 3.60 V)
Default
N/A
Bytes returned
4

DB (Received Signal Strength)

This command reports the received signal strength indicator (RSSI) of the last RF data packet that a
device receives. It reports the RSSI in decibels relative to milliwatts. DB is useful in determining range
characteristics of the RF devices under various conditions. On XTC, this is accurate from approximately -50
to -100 dBm.
In Transparent operating mode, DB shows the power level in signed decimal format with the units (dBm).
If CF = 1, the magnitude of the value is in unsigned hex. If CF = 2, the value is in decimal, but without the
units.
1
When CF = 1 (default), the firmware shows a hex integer that is equal to (voltage * 65536d).
XBee/XBee-PRO XTend Compatible (XTC) RF Module User Guide
1
Diagnostic commands
44

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