Chapter 7
Default firmware settings
7.1
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
ATQ
0
Result code suppression
ATV
1
Response format
ATS0
0
Auto answer
AT+CSCS
“PCCP437”
Character Set
AT+CMGF
1
Short message format
7.2
General Purpose Input/Output port
This port can be configured as either an input or an output and is mapped to GPIO26 in the internal micro-controller.
–
To setup this port as an input, type
AT+WIOM=1,"GPIO26",0
on the serial port. Then to read the status of the
input, type
AT+WIOR="GPIO26"
.
+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,"GPIO26",1
on the serial port. Then set the state of the
output with
AT+WIOW="GPIO26",0
for 0V, or
AT+WIOW="GPIO26",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.
7.3
RS232 auto-online mode (power saving)
When on auto-online mode, the RS232 transceiver will shut down most of its hardware, to save power, if it does not
detect a valid input for more than 100
µs
. The RS232 transceiver will wake up when valid input is detected again. By
default, auto-online mode is not active. To activate it, issue
AT+WIOM=1,”GPIO22”,1,0
followed by
AT+WIOM=4
.
This setting needs to be set once, and will be saved in memory.
Confidential, the whole document is the sole property of Maestro Wireless Solutions ltd.
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