User's Manual

SARA-G3 and SARA-U2 series - System Integration Manual

UBX-13000995 - R18 Advance Information System description

Page 44 of 206

The module firmware can be updated over the UART interface by means of:

x the Firmware upgrade Over AT (FOAT) feature, on all the SARA-G3 and SARA-U2 series modules

x the u-blox EasyFlash tool, on SARA-U2 series modules only

For more details on FW upgrade procedures see section 1.13 and Firmware update application note [28].

1.9.1.2 UART AT interface configuration

The UART interface of SARA-G3 and SARA-U2 series modules is available as AT command interface with the

default configuration described in Table 10 (for more details and information about further settings, see the

u-blox AT Commands Manual [3]).

Interface AT Settings Comments

UART interface

AT interface: enabled

AT command mode is enabled by default on the UART physical interface

AT+IPR=0

Automatic baud rate detection enabled by default on SARA-G3 series

One-shot automatic baud rate detection enabled by default on SARA-U2 series

AT+ICF=0

Automatic frame format recognition enabled by default on SARA-G3 series

One-shot automatic frame format recognition enabled by default on SARA-U2 series

AT&K3

HW flow control enabled by default

AT&S1

DSR line set ON in data mode

and set OFF in command mode

AT&D1

Upon an ON-to-OFF transition of DTR, the DCE enters online command mode

and issues

an OK result code

AT&C1

Circuit 109 changes in accordance with the Carrier detect status; ON if the Carrier is

detected, OFF otherwise

MUX protocol: disabled

Multiplexing mode is disabled by default and it can be enabled by AT+CMUX command.

The following virtual channels are defined:

x Channel 0: control channel

x Channel 1: AT and data

x Channel 2: AT and data

x Channel 3: AT and data (not available on SARA-G300 / SARA-G310 modules)

x Channel 4: AT and data (not available on SARA-G300 / SARA-G310 modules)

x Channel 5: AT and data (not available on SARA-G300 / SARA-G310 modules)

x Channel 6: GNSS tunneling (not available on SARA-G300 / SARA-G310 modules)

Channel 7: SIM Access Profile (not available on SARA-G3 series modules)

Table 10: Default UART AT interface configuration

See the u-blox AT Commands Manual [3] for the definition of the command mode, data mode, and online command mode.