Siemens MC35 - Manual (Page 173)

AT Command Set
MC35_ATC_01_V03.02 Page 173 of 228 13.03.2002
8.5 AT^SBC Battery charging / discharging and charge control
This chapter is only applicable to MC35, it is not intended for MC35 Terminal.
Responses returned by the AT^SBC command vary with the operating mode of the ME:
Normal mode:
ME is switched on by Ignition pin and running the SLEEP, IDLE,
TALK or DATA mode. Charger is not connected. AT^SBC can be
used to query the battery capacity and the power consumption of
ME and application (if value of application was specified before as
).
Normal mode + charging: Allows charging while ME is switched on by Ignition pin and running
the SLEEP, IDLE, TALK or DATA mode. AT^SBC returns charger
status and power consumption of ME / application. Battery capacity
is not available.
Charge-only mode: Allows charging while ME is detached from GSM network. When
started, the mode is indicated by the URC "^SYSSTART CHARGE-
ONLY MODE". AT^SBC returns charger status and power con-
sumption of ME / application. Percentage of battery capacity is not
available. In Charge-only mode a limited number of AT commands is
accessible (see Table 9). There are several ways to activate the
Charge-only mode:
a) from Power Down mode: Connect charger while ME was powered
down with AT^SMSO
b) from Normal mode: Connect charger, then enter AT^SMSO.
Alarm mode: No charging functionality, i.e. charging does not start even though
the charger connects to the POWER lines. Battery parameters are
not available.
Charging begins once the charger connects to the POWER pins of the ZIF connector (except for the
Alarm mode). Please refer to the [1] ("Hardware Interface Description") supplied with your GSM en-
gine and the Application Note "Charging the Battery Pack" for details on the charging process.
Test command
AT^SBC=?
Response
^SBC: (list of supported >s),(list of supported <bcl>s),<mpc> module power
consumption
Defined values
<bcs>
0 No charging adapter is connected
1 Charging adapter is connected
2 Charging adapter is connected, charging in progress
3 Charging adapter is connected, charging has finished
4 Charging error, charging is interrupted
5 False charging temperature, charging is interrupted while
temperature is beyond allowed range
<bcl> Battery capacity
0, 20, 40, 60, 80, 100 percent of remaining capacity (6 steps)
0 indicates that either the battery is exhausted or the capacity value
is not available
Average power consumption:
Value (0...5000) of average power consumption (mean value over a
couple of seconds) in mA. See read and write command for details.