LARA-R2 series - System Integration Manual
UBX-16010573 - R02
Objective Specification
System description
Page 60 of 148
The use of hybrid positioning requires a connection via the DDC (I
2
C) bus between the cellular modules and the
u-blox GNSS receiver (see section 2.6.4).
See
GNSS Implementation Application Note
[22] for the complete description of the feature.
u-blox is extremely mindful of user privacy. When a position is sent to the CellLocate
®
server u-blox is
unable to track the SIM used or the specific device.
1.14.12
Wi-Fi integration
u-blox short range communication Wi-Fi modules integration is not supported by “02” product versions.
Full access to u-blox short range communication Wi-Fi modules is available through a dedicated SDIO interface
(see sections 1.9.5 and 2.6.5). This means that combining a LARA-R2 series cellular module with a u-blox short
range communication module gives designers full access to the Wi-Fi module directly via the cellular module, so
that a second interface connected to the Wi-Fi module is not necessary.
AT commands via the AT interfaces of the cellular module (UART, USB) allows a full control of the Wi-Fi module
from any host processor, because Wi-Fi control messages are relayed to the Wi-Fi module via the dedicated SDIO
interface.
All the management software for Wi-Fi module operations runs inside the cellular module in addition to those
required for cellular-only operation.
1.14.13
Firmware upgrade Over AT (FOAT)
This feature allows upgrading the module firmware over USB / UART serial interfaces, using AT commands.
The +UFWUPD AT command triggers a reboot followed by the upgrade procedure at specified a baud rate
A special boot loader on the module performs firmware installation, security verifications and module reboot
Firmware authenticity verification is performed via a security signature during the download. The firmware is
then installed, overwriting the current version. In case of power loss during this phase, the boot loader
detects a fault at the next wake-up, and restarts the firmware download. After completing the upgrade, the
module is reset again and wakes-up in normal boot
For more details about Firmware update Over AT procedure see the
Firmware Update Application Note
[23] and
the
[2], +UFWUPD AT command.
1.14.14
Firmware update Over The Air (FOTA)
This feature allows upgrading the module firmware over the LTE/3G/2G air interface.
In order to reduce the amount of data to be transmitted over the air, the implemented FOTA feature requires
downloading only a “delta file” instead of the full firmware. The delta file contains only the differences between
the two firmware versions (old and new), and is compressed. The firmware update procedure can be triggered
using dedicated AT command with the delta file stored in the module file system via over the air FTP.
For more details about Firmware update Over The Air procedure see the
Firmware Update Application Note
and the
[2], .
