User manual

CEP AG Revision 1.3
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Page 15 of 28
3.3.2 Status LEDs (one yellow, one red)
The red and yellow Status LEDs are under control of GPIO1 and GPIO2 of the
GT864-QUAD/PY modem inside of the Terminal. They can be controlled via at-
commands. The default status of these two LEDs is off. The following commands
have to be used to initialise and to configure the GPIOs to control the two LEDs:
Switching on GPIO1 at#gpio=1,1,1
Switching off GPIO1 at#gpio=1,0,1
Switching on GPIO2 at#gpio=2,1,1
Switching off GPIO2 at#gpio=2,0,1
These LEDs can be controlled e.g. by an external microcontroller via at-commands
issued to the terminal via the serial RS232 interface. They can be used for signalling
any useful status of the external application such as:
- error indication
- status of communication (GPRS, SMS, CSD, etc.)
- status of GSM-network (to simulate GSM LED)
- quality of service
4 Power consumption
The following table shows you the power consumption of the GT864 Quad / PY in
different modes:
GT864 Quad Terminal
[mA] @ 5V [mA] @ 12V [mA] @ 24V [mA] @ 32V
GT864 off 0,075 0,520 1,770 2,580
GT864 idle mode 52 22 16 14
GT864 with voice call 203 86 41 40
GT864 PY Terminal
[mA] @ 5V [mA] @ 12V [mA] @ 24V [mA] @ 32V
GT864 off 0,080 0,557 1,768 2,596
GT864 idle mode 61 26 17 17
GT864 with voice call 207 87 43 42