5.2. Time Settings
All of the LoRa WAN nodes should be operated with the time set to UTC
(Universal Coordinated Time, also often called GMT). This matches with
the settings in the Sensori platform and avoids issues with having to
change the time when daylight savings starts and ends (which always
causes an hour data gap). When the data is viewed, a time offset will be
applied according to the time zone set for the location in which the unit is
installed.
To set the time:
from the
Boards Configuration
screen, click on the
Time Zone
tab
from the Time Zone Selection list box, select
UTC – Universal
Coordinated Time
to set the time in the board, click on the
Set Time for External
RTC
button.
5.3. Schedule Settings
These control how often measurements are made and transmitted.
Normally the Measurement Interval and Transmit Interval will be set to the
same value
Transmit Interval: set this to how often you want the values to be
sent. Normally this is the same as the Measurement Interval e.g.
15 min for soil moisture and weather, 8 hours for groundwater
Measurement Interval: set to 15 or 30 minutes for soil moisture
sensors
◦
on the TBS12PC-FS the measurement interval must equal the
Transmit Interval
Transmission Delay: adds a delay after the read is completed
before the unit sends its data
◦
within the LoRaWAN ecospace, it is assumed that nodes will
wake at random and send values. This approach is fine when
nodes only transmit a few packets once a day
◦
But in our applications (with lots of data and frequent
transmission) we need to manage transmissions so that they
don’t all occur at once (collisions)
◦
First estimate how long it will take for the node to read the
sensors (e.g. 10 seconds), then allow another 10 second buffer
and start to add your Nodes with a 10 or 20 second offset: first
