Specifications

Chapter 6
Default firmware settings
6.1 Factory settings
The modem has the following factory settings. Please refer to the AT command document for the meaning of each
setting.
Related AT commands Factory settings Description
AT+IPR 115200 DTE-DCE data rate
AT+IFC 2,2 DTE-DCE flow control
AT+ICF 3,4 DTE-DCE character framing
ATE 1 ECHO
AT&C 1 DCD signal
AT&D 2 DTR signal
ATQ 0 Result code suppression
ATV 1 Response format
AT&S 1 DSR signal
ATS0 0 Auto answer
AT+CLIP 0 Calling line ID presentation
AT+CRLP Calling line ID restriction
AT+CSCS “PCCP437” Character Set
AT+CMGF 1 Short message format
6.2 General Purpose Input/Output port
This port can be configured as either an input or an output and is mapped to GPIO1 in the internal micro-controller.
– To setup this port as an input, type AT+WIOM=1,"GPIO1",0 on the serial port. Then to read the status of the
input, type AT+WIOR="GPIO1". +WIOR: 0 means 0V while +WIOR: 1 means a positive voltage of no more
than 12V. Higher voltages may damage the unit.
– To setup this port as an output, type AT+WIOM=1,"GPIO1",1 on the serial port. Then set the state of the output
with AT+WIOW="GPIO1",0 for 0V, or AT+WIOW="GPIO1",1 for 2.8V.
Note: Please note that the input port is put by default to High status internally, so you just need to short
it to the ground to make it low, and open to make it high.
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