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ICR-2701
2.3 Low Power Mode
In applications requiring low power consumption (such as solar power - not 7/24 mode)
is strictly recommended to use LPM mode prior to powering down the entire router.
LPM (Low Power Mode) is a router mode where the router is in sleep mode with minimal
power consumption; see Chapter 4.1 for the LPM consumption. The router can be woken up
from this mode after a predetermined period of time. Putting the router into LPM mode can be
done using the lpm command, see Commands and Scripts application note for more details.
2.4 USB Port
There is one USB 2.0 host port with socket of USB-A type. USB Mass Storages and FTDI
serial converters are supported. For a piece of advice, how to fix an unsupported FTDI chip,
see the Commands and Scripts application note, chapter How to Use Unsuppor ted FTDI Chip.
The USB port is disabled on overload to prevent its damage (connected device is trying to get
too high current). The port is enabled again after the reboot of the router.
Mounting USB Flash Drive to the System
It is necessary to mount the USB flash drive to be able to access it in the system of the
router. Follow these steps to mount the drive:
• Use the dmesg command to see the list of recently connected devices.
• In the output of the command find out the entry for the microSD card, for example:
sda: sda1
• To mount the card to to mnt directory, use the mount command:
mount /dev/sda1 /mnt
For more information about the commands for creating, mounting, checking and unmounting
a file system on a USB Flash Drive, see the application note for
Ext4_tools router app.
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