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AT+SGPIO=
<operation>,<GPI
O>,<function>
,<level>
OK
ERROR
Parameters
<Operation>
0 Set the GPIO function including the GPIO output and
GPIO as the Keypad.
1 Read the GPIO level. Please note that only when the
gpio is set as input, user can use parameter 1 to read
the GPIO level, otherwise the module will return
"ERROR".
<GPIO>
The GPIO you want to be set. (It has relations with the
hardware, please refer to the hardware manual)
<function>
Only when <Operation> is set to 0, this option takes
effect.
0 Set the GPIO to input.
1 Set the GPIO to output
2 Set the GPIO to keypad
<level>
0 Set the GPIO low level
1 Set the GPIO high level
6.4
Antenna interface
6.4.1
Antenna connector
Antenna connector allows transmission of radio frequency (RF) signals between the modem
and the external supplied antenna. The HDM1004G modem is fitted with a 50Ω male SMA
connector.
Figure 14: Antenna interface
