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Upon completion of the above steps the status LED shall turn GREEN to indicate that provisioning has been successful.
5.16. Test modes
A number of test modes can be activated prior to deployment in order to check that the hardware and overall system configuration are functioning
correctly. It is recommended to use the --test_mode option to enable these tests prior to unplugging the USB cable.
Below is an example command for enabling the GPS and cellular test modes:
$ tracker_config --test_mode GPS,CELLULAR
Note that the test modes will not become active until the USB cable is unplugged. The progress of the test modes can be tracked using the status
LED.
5.16.1. Maximizing GPS TTFF performance
In order to maximize the TTFF performance of the GPS module, it is recommended that a complete ephemeris is obtained after the first GPS fix is
made. This generally requires a certain period of time to elapse (with continual GPS lock) that is sufficient for the GPS device to obtain the
ephemeris data from all satellites in view.
This can be accomplish using GPS test mode. For example, setting the
parameter to
would prevent the tracker from
testFixHoldTime
60
shutting down until a period of 60 seconds of continuous GPS lock have elapsed during GPS test mode.
In order to aid the end user, the LED indicator can be used to ascertain the status of the GPS test mode process:
LED flashing green - waiting for GPS test fix or GPS test fix lost during hold period
LED solid green - fix found, waiting for hold period to elapse
LED off - hold period elapsed with continual GPS lock
5.16.2. Checking IOT cellular connectivity
In order to ensure that the cellular connectivity is working properly, it is recommended to activate cellular test mode on start up. This will execute
a complete status and logging update cycle.
5.16.3. Sending a
satellite test message
While it can not be g
uaranteed
that satellites will be in view of the
Horizon
board, it is still possible to transmit a single satellite test message
using
the satellite test mode
.
This can at least confirm that the hardware is functional.
6. Post-provisioning guide
6.1. Test modes
The test modes can also be activated using the DFU push button or via a bluetooth connection using the
command after
--test_mode
provisioning over USB has completed.
6.2. GPS
The tracker shall now start logging periodically in accordance with the tracker JSON configuration file settings. GPS fixes shall be stored to the
log file. The most recent GPS fix shall also be stored in RAM along with a timestamp of when the GPS fix was made.
6.3. IOT connectivity and data management
The system will attempt to make an IOT connection in accordance with the JSON configuration file settings. During each IOT connection cycle
the following information shall be provided:
Arribada Horizon ARTIC R2 Developer’s Kit | User Manual