SARA-G3 and SARA-U2 series - System Integration Manual
UBX-13000995 - R26 System description
Page 62 of 217
The multiplexer protocol is not supported over SARA-G3 and SARA-U2 series modules’ Auxiliary UART interface.
SARA-G3 modules’ auxiliary UART interface can be configured in GNSS tunneling mode by means of the
AT+USIO command (for more details, see Table 12 and the u-blox AT Commands Manual [3]), so that:
raw data flow to and from a u-blox GNSS receiver connected to the cellular module via I
2
C interface is
available (for more details, see the u-blox AT Commands Manual [3], +UGPRF AT command)
None flow control is supported
Baud rate is 115200 bit/s
Frame format is 8N1 (8 data bits, no parity, 1 stop bit)
The module firmware can be updated over the auxiliary UART interface of SARA-G3 modules’ by means of:
the u-blox EasyFlash tool
For more details on FW upgrade procedures, see the Firmware update application note [27].
FOAT is not supported on the auxiliary UART interface.
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