Users Guide

Table Of Contents
If TPM is turned on, the device node (/dev/tpm0) exists.
(plano)ubuntu@localhost:~$ ls /dev/tpm0
/dev/tpm0
Watchdog Timer (WDT)
NOTE: For more information about Watchdog Timer (WDT) commands, see www.sat.dundee.ac.uk/~psc/watchdog/Linux-
Watchdog.html.
Dell recommends that you enable the WDT by default to activate the fail-safe circuitry. Snappy, a WDT-compatible operating
system, provides the capability to detect and recover the system from malfunctions or unexpected crashes.
To check daemon status, run the command:
admin@localhost:$ systemctl show | grep i watchdog
Returns:
RuntimeWatchdogUSec=1min
ShutdownWatchdogUSec=10min
NOTE: The default value is 10. The actual value should be greater than 0.
To configure WDT, run the command:
admin@localhost:$ sudo vi /etc/systemd/system.conf.d/watchdog.conf
Cloud LED On/Off
Cloud LED enables you to visually inspect the operational status of the Edge Gateway by looking at the display light on the left
panel of the Edge Gateway.
1. To export Cloud LED PIN, run the command:
#sudo su
#echo 346 > /sys/class/gpio/export
#echo out > /sys/class/gpio/gpio346/direction
2. To turn on Cloud LED, run the command:
#echo 1 > /sys/class/gpio/gpio346/value
or
To turn off Cloud LED, run the command:
#echo 0 > /sys/class/gpio/gpio346/value
Global Positioning Systems (GPS)
NOTE: For more information about GPS configurations, see http://locationd.readthedocs.io/en/latest/intro.html.
National Marine Electronics Association (NMEA) data is supported if the GPS module is present in the system. In the operating
system, the location service is a central hub for multiplexing access to positioning subsystems available through hardware and
software. It provides a client API offering positioning capabilities to applications and other system components..
To retrieve NMEA streaming data:
Setting up the operating system
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