SARA-R4/N4 series - AT Commands Manual
UBX-17003787 - R09
15 GPIO
Page 163 of 307
15 GPIO
15.1 Introduction
The section describes the AT commands used to configure the GPIO pins provided by u-blox cellular modules.
15.1.1 GPIO functions
On u-blox cellular modules, GPIO pins can be opportunely configured as general purpose input or output.
Moreover GPIO pins of u-blox cellular modules can be configured to provide custom functions via
AT command. The custom functions availability can vary depending on the u-blox cellular modules series and
version: see
for an overview of the custom functions supported by u-blox cellular modules.
<gpio_mode>
Output
Input
Network status indication
GNSS supply enable
GNSS data ready
GNSS RTC sharing
Jamming detection
SIM card detection
Headset detection
GSM Tx burst indication
Module operating status indication
Module functionality status indication
I
2
S digital audio interface
SPI serial interface
Master clock generation
UART (DSR, DTR, DCD and RI) interface
Wi-Fi enable
Ring indication
Last gasp enable
Pad disabled
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
18
19
255
SARA-R404M / SARA-
R412M / SARA-R410M-0
1B / SARA-R410M-02B
*
*
*
*
*
*
SARA-R410M-52B
*
*
*
*
*
*
*
SARA-N4
*
*
*
*
*
*
*
Table 15: GPIO custom functions overview
The configuration of the GPIO pins (i.e. the setting of the parameters of the
in the NVM and used at the next power-on.
15.1.2 GPIO mapping
The number of available GPIO pins and their mapping can vary depending on the u-blox cellular modules series
and version. The GPIOs mapping for different u-blox cellular modules is reported in the following tables.
See the corresponding module system integration manual for the functions supported by each GPIO.
<gpio_id>
Pin name
Pin number
Factory-programmed function
Remarks
16
GPIO1
16
Pin disabled
-
23
GPIO2
23
Pin disabled
-
24
GPIO3
24
Pin disabled
-
25
GPIO4
25
Pin disabled
-
42
GPIO5
42
Pin disabled
Only pin 42 can be configured for
SIM card detection functionality
19
GPIO6
19
Pin disabled
-
Table 16: SARA-R4 / SARA-N4 series GPIO mapping
SARA-R4 / SARA-N4
When the SIM card detection functionality is enabled, the
AT command reports the status.
When the SIM card detection functionality is enabled, the status can be read with the
AT
command.
