SARA-G3 and SARA-U2 series - System Integration Manual 
UBX-13000995 - R26    System description 
    Page 79 of 217 
  General purpose input: 
All the GPIOs can be configured as input to sense high or low digital level through AT+UGPIOR command, 
setting the parameter <gpio_mode> of AT+UGPIOC command to 1. 
The “General purpose input” mode can be provided on more than one pin at a time. 
No GPIO pin is by default configured as “General purpose input”. 
The pin configured to provide the “General purpose input” function is set as: 
o  Input, to sense high or low digital level by AT+UGPIOR command. 
 
  General purpose output: 
All  the  GPIOs  can  be  configured  as  output  to  set  the  high  or  the  low  digital  level  through  AT+UGPIOW 
command, setting the parameter <gpio_mode> of +UGPIOC AT command to 0. 
The “General purpose output” mode can be provided on more than one pin per time. 
No GPIO pin is by default configured as “General purpose output”. 
The pin configured to provide the “General purpose output” function is set as: 
o  Output / Low, if the parameter <gpio_out_val> of AT+UGPIOW command is set to 0 
o  Output / High, if the parameter <gpio_out_val> of AT+UGPIOW command is set to 1 
 
  Pin disabled: 
All the  GPIOs can  be configured in tri-state with an internal active pull-down enabled,  as a  not used pin, 
setting the parameter <gpio_mode> of +UGPIOC AT command to 255. 
The “Pin disabled” mode can be provided on more than one pin per time: it is possible to simultaneously set 
the same mode on another pin (also on all the GPIOs). 
The pin configured to provide the “Pin disabled” function is set as: 
o  Tri-state with an internal active pull-down enabled 
 
Table 15 describes the configurations of all SARA-G340, SARA-G350 and SARA-U2 modules’ GPIO pins. 
 
By default, the pin is configured as Pin disabled. 
Can be alternatively configured by the AT+UGPIOC command as 
  Input / Output 
  Network Status Indication 
  GNSS Supply Enable 
  GSM Tx Burst Indication 
  Jamming indication
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SARA-U201 
SARA-U260 
SARA-U270 
By default, the pin is configured as Pin disabled. 
Can be alternatively configured by the AT+UGPIOC command as 
  Input / Output 
  Network Status Indication 
  GNSS Supply Enable 
  GSM Tx Burst Indication 
  Module Status Indication 
By default, the pin is configured as Pin disabled. 
Can be alternatively configured by the AT+UGPIOC command as 
  Input / Output 
  Network Status Indication 
  GNSS Supply Enable 
  Module Status Indication 
  
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 Not supported by product versions “00” and “01”.