Cep Terminals GPRS-TERMINAL GT864 E 6600 数据表
产品代码
6600
CEP AG
Revision 0.9
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Page 14 of 27
3.3 Operating states / LEDs
3.3.1 Power up LED (green LED in the middle)
The modem has a green power up LED, as depicted below, which is used to indicate
various operating states. These states are described in following table.
Operating state of GT864 E
Power up LED state
Device off
Permanently off
net search / not registered /
Fast blinking (period=1s,
LED
on
=0,5s
registered full service
Slow blinking (period=3s,
LED
on
=0,3s
A call is active
Permanently on
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 E 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