MC55_ATC_V04.00 Page 433 of 475 3/17/06
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18.4 AT^SBV Battery/Supply Voltage
The AT^SBV execute command allows to monitor the supply (or battery) voltage of the module. The voltage is
continuously measured at intervals depending on the operating mode of the RF interface. The duration of a mea-
surement period ranges from 0.5s in TALK / DATA mode up to 50s when MC55 is in IDLE mode or Limited Ser-
vice (deregistered). The displayed value is averaged over the last measuring period before the AT^SBV
command was executed.
The measurement is related to the test points of BATT+ and GND, both accessible on the bottom of the module.
Refer to [1] for information on the module's test points.
Syntax
Parameter Description
Supply (or battery) voltage in mV
Test Command
AT^SBV=?
Response(s)
OK
ERROR
+CME ERROR:
Exec Command
AT^SBV
Response(s)
^SBV: <value>
OK
ERROR
+CME ERROR:
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge  Last
SIEMENS ! % % % % % % % !
<value>
(num)
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