My gps only referenced 4 satellites (very poor ammount) and tried to make changes like switching of fthe dpo option, but it resulted a bad option. Now I got no satellites. zero.
Tried through ssh to restart service but I got this:
root@RUTX50:/etc# gpsd
[gpsd_ubus_init:409] error: Failed to add object: Invalid argument[nmea_init:678] error: Failed to initialize GPS ubus
[main:35] error: Failed to open the gps device for NMEA reading
root@RUTX50:/etc#
Does this mean my antenna is faulty or is any other trick I can do to regenerate my GPS. At the web ui the service appears as enabled and up, but I get no data nor time from the satellites.
This router and gps antenna are placed inside a fiberglass yatch.
No steel over the antenna. Sky on top.
The problem for me was the long time to get the positions. I have more gps devices inside and with antennas just beside this and they get as muach as 15 satellites! Just now I have 15 vs 4 with teltonika.
To better understand the issue, could you please specify which type of GPS antenna you are using with the RUTX50 (internal, external, manufacturer/model, etc.)?
If possible, please also test the setup in an open outdoor environment. GNSS performance can degrade significantly indoors or in areas with limited sky visibility.
A few important factors that may affect GPS reception when an antenna is installed inside a fiberglass enclosure:
Conductive materials in the fiberglass (carbon additives, conductive paint, metallic mesh, or shielding coatings) can attenuate or distort GNSS signals.
Excessive casing thickness increases signal loss.
Improper antenna placement, especially near metallic brackets or frames, can degrade performance.
Moisture absorption in the fiberglass changes dielectric properties and reduces sensitivity over time.
Obstructed sky view, even when fiberglass is non-conductive, can worsen satellite geometry (fewer satellites or poor dilution of precision).
Once you confirm the antenna type and placement, I’ll be able to guide you more precisely.
Just beside this antenna is placed another from an AIS manufacturer very similar in shape to the teltonika one. Both devices are placed at the same place separated only 40 cm. The top of this area is the deck of the boat made of fiberglass laminated.
Between antennas and the sky there is only this deck.
One gives only a few ammount of satellites (one hour ago I saw 6 in the teltonika one) and 15 at the AIS manufacturer. In both cases I tick all the possible systems :GPS signals. Beidou, Glonass, Galileo and GPS itself.
The teltonika webui is marked with the DPO enabled .
Just to comment the differences between both systems and the issue of long time to get the position once the parameters of the teltonika gps webui are changed. Maybe is useful for further developement.
To better understand the difference you’re seeing in GPS performance, could you please let me know the exact model of the AIS GPS antenna you’re using with the device? Having the precise model will help us determine whether any antenna-related specifications or limitations could be affecting the results.
I was able to locate the transceiver model you are using. To better understand the performance differences, could you please clarify which of the two antenna types listed on the manufacturer’s page you have installed?
Here are the two available options shown in their documentation:
Additionally, you mentioned that the devices are positioned roughly 40 cm apart. Could you confirm whether both antennas are enclosed in fiberglass laminate, or only one of them? The enclosure material and placement can significantly influence GPS reception and overall signal quality, so this detail will help with a more accurate comparison.
Hello, Just a quick idea to check perhaps could be worth checking.
So It could be an issue with GNSS ground plane. Some GNSS antennas need conductive ground plane to work well. Search “gnss antenna with or without ground plane” with Google and you find what I’m thinking it would cause what you see there Antonio.
Most likely the PA-02 setup detects far more satellites is the antenna itself. PA-02 is a high-gain, low-noise, multi-constellation GNSS antenna designed for professional/marine use. It receives weaker and lower-elevation satellites, filters out RF interference more effectively, and provides a significantly stronger signal to the GNSS receiver.
The standard Teltonika antenna has much lower gain and sensitivity, and is more affected by nearby 4G/5G RF noise and installation placement. As a result, even though the RUTX50 GNSS receiver is capable, it simply receives fewer usable satellite signals.
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