For basic devices, speed data is obtained from the GNSS module. When a GPS fix issue occurs, the associated parameters—coordinates, speed, altitude, and time—may be impacted. In certain cases, these values can drop to zero or remain static.
Explanation:
It is unusual to receive zero speed values from the GNSS module while the server continues to register for coordinate changes. When this type of behavior occurs, it is important to first verify the other basic parameters alongside the speed values, and cross-check them using alternative sources such as SMS commands and device logs.
Additionally, confirm that the device configuration aligns with the standard settings, and validates whether the issue can be resolved through a remote reset.
Guidelines:
Recommended Troubleshooting Steps:
Validate the response to the following SMS command:
<password> coords
The coords command returns the following information:
Response structure: <time>, lat. <latitude>, long. <longitude>, alt. <altitude>, sat. <satellites>, dir. <angle>, hdop <hdop>, state <X>
Check the configuration file (CFG):
Verify in the GNSS section that all constellations are enabled:
Confirm that offline tracking is disabled:
Check the navigation filter configuration:
Validate that the required IO parameters are enabled and actively monitored:
Download a server report that includes all GNSS data; coordinates, speed, altitude, time and HDOP, along with the required IO parameters outlined in point 2, such as Time to GNSS fix, GPS altitude, GPS speed, GPRS status, Device uptime, Custom ignition, Movement sensor, and Power supply voltage.
Send an SMS command log to validate all this information. Use the following command:
getlog 92.62.134.14,10103,1,30
This log will be available on our internal server in 30 minutes.
Send the reset SMS command to the device:
After sending this SMS command, the device will reboot, but its configuration parameters will not be lost.
All these steps assume that you may not have direct access to the vehicle. This means that if GPRS and SMS communication are available, the procedure can be handled remotely.
If the root cause of the issue is not identified and speed values continue to appear as zero while coordinates are changing, you will need to share all collected information with our support team. This will allow comparison of server reports, SMS responses, and the device’s internal log.
Tools required:
Name: | Link: |
SMS Command List | |
Advanced configurator |
Keywords:
Issue, Troubleshooting, zero speed, Coordinates, SMS commands, coords, getlog, reset, advanced configurator, GNSS, Navigation filter, IO parameters, Time to GNSS fix, GPS altitude, GPS speed, log, server report.
Automatically generated fields:
Document# | xxxxx |
Created By: | Frank Grau |
On: | 06/05/2026 15:00:00 |
Modified By: | Name Surname |
On: | dd/mm/yyyy hh:mm:ss |