TOBY-L2 and MPCI-L2 series - System Integration Manual
UBX-13004618 - R28
System description
Page 62 of 164
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 (for more details, see the Wi-Fi AT commands in the u-blox AT
Commands Manual
All the management software for Wi-Fi module operations runs inside the cellular module in addition
to those required for cellular-only operation: Wi-Fi driver, Web User Interface (WebUI), Connection
Config Manager.
For more details, see the Wi-Fi / Cellular Integration Application Note
1.15.12
Firmware update 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
and the u-blox AT Commands Manual
, +UFWUPD AT command.
1.15.13
Firmware update Over The Air (FOTA)
☞
Firmware update Over The Air (FOTA) is not supported by “00” and “60” product versions.
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 u-blox AT Commands Manual
, +UFWINSTALL AT command.
1.15.14
Smart temperature management
☞
Smart temperature management is not supported by “00”, “01” and “60” product versions.
Cellular modules – independent of the specific model – always have a well defined operating
temperature range. This range should be respected to guarantee full device functionality and long life
span.
Nevertheless there are environmental conditions that can affect operating temperature, e.g. if the
device is located near a heating/cooling source, if there is/isn’t air circulating, etc.
The module itself can also influence the environmental conditions; such as when it is transmitting at
full power. In this case its temperature increases very quickly and can raise the temperature nearby.