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7.6 Quick Start guide
The serial interface default configuration is:
… 115.2 kbit/s, 8 databits, no parity and 1 stop bit
(please refer to AT+IPR and AT+ICF commands)
… RTS / CTS flowcontrol enabled (please refer to AT+IFC command)
… DTR signal must be active from the DTE (please refer to AT&Dn command)
Follow the steps below to get the unit up and running as quickly as possible:
… Make sure the power is disconnected from the unit
… Insert a valid SIM-card with correct services enabled
(e.g. incoming and outgoing DATA service)
… Make sure that the antenna is connected and placed in the best position possible
… Power on the unit and make sure that the PIN code of the SIM-card is disabled either
with the help of a mobile phone or with the command AT+CLCK. If the PIN code
should be enabled make sure to enter the correct PIN code with the command
AT+CPIN
… Check on the front of the GD that the NET LED is flashing, this means that the unit
has a connection to the GSM network and that it is registered
… Check the received signal quality with a terminal program (please refer to AT+CSQ
command) The value of the first parameter reported from the +CSQ command
should be between 10 and 31, the value of the second parameter should always be 0
… Make sure that the DTE equipment is connected and configured with the same serial
settings as the GD unit
… Configure the GD unit with appropriate commands as needed in the specific applica-
tion. Please refer to the application examples found in the AT-command guide
Make sure that the DTE equipment is connected and configured with the same serial
settings as the GD unit
… Configure the GD unit with appropriate commands as needed in the specific applica-
tion. Please refer to the application examples found in the AT-command guide
7.7 Configuration
The GD-01 US can be configured via industry standard set of AT-commands on the
service port interface.
For a complete description of all AT-commands please refer to the AT-command guide.
7.7.1 Service port
The service port (RS-232 interface) is default configured to:
Serial speed: 115.2 kbit/s
Data format: 8 data bits, No parity and 1 stop bit
Flow control: RTS / CTS
DTR control: ON (AT&D2)
