21
LUMA X
3/2022
4.4
Recording a log file
The
Debug report
button allows the user to run a self-check on the LUMA X and quantify the
communication performance using two LUMA X.
Before you proceed with the test, two LUMA X should be connected to the same computer
using Ethernet and they should be set into
config
mode.
When opening the debug report window, multiple parameters can be selected for the
communication performance test. These are the throughput, encoding, the number of
transmitting LEDs and the number of active receivers. Selecting a higher number of parameters
will require a longer testing time. Varying the number of transmitting LEDs helps determining if
the receiver of the LUMA X is saturating for a short communication distance. Varying the
throughput is useful to see if communication is possible at the selected speeds for a given
range/turbidity/ambient light level.
When starting the test, a prompt asking for a log file name will appear.
The two LUMA X will then proceed doing the test automatically which will be composed of a
few internal tests that each LUMA X will do individually as well as the communication tests
which will use both LUMA X. During the communication tests, the two LUMA X will vary their
receiver gain and report their perceived throughput at various gain values for each selected
parameter. For optimal testing, the LUMA X should be placed in an area with constant ambient
light and not be moved during the test. When the progress bar reaches 100% the test is
completed and a log file will be written in the chosen folder. This log file can be sent to
Hydromea for analysis
4.5
Visualizing a log file
A log file generated in 4.4 can also be converted into a readable PDF file using the
Create graph
button in the main window of
LumaConf
. Selecting
Create graph
opens a dialog
where you can
select the log file to create a PDF graph of. The PDF graph will show the perceived throughput
of the two LUMA X over a range of gain values. This can be useful to evaluate the autogain
performance and, in case it has trouble to automatically find an optimal gain value, determine a
value to which to set the gain manually in a controlled environment.
5
Maintenance
Please wash the modem with warm water (only) to remove any built-up which could negatively
affect its operation. Apply a thin film of silicone grease to the rubber part of the connector pins
to protect the connector and to facilitate mating. For maintenance details regarding the
connector follow SubConn's instructions.
