teseo-liv4f + cep

[mich35]

Hello,

Is there any specific parameters to configure to acheive correct CEP?

Starting from default mode I found a CEP worst than some L1 only GNSS....despite I respect the 70x70mm ground plan for the antenna....

Many points are correct (but not more) but a few are awfull (more than 20m far away from position...)

Do you suggest any ceramic antenna?

Best regards

Mich

[mich35]

I will update, despite bought last week, the revision was:

$PSTMVER,FreeRTOS_V10.4.3_ARM*57
$PSTMVER,BINIMG_STA8041_4_6_2_4_2_ARM*0D

[mich35]

I have now a $GPGBS message which is not in your documents.

What is this $GPGBS message?

$GPGBS,151351.000,,,,,,,,,,,3

[Tesla DeLorean]

https://receiverhelp.trimble.com/alloy-gnss/en-us/NMEA-0183messages_GBS.html

[mich35]

Thanks for the GBS link.

Why the teseo sends this GBS message after firmware update?

Why there is no field in thsi GBS message?

How can I have the teseo working correctly now?

I updated it on an ST employee advice....

Is it a problem of configuration? What are the default configuration?

Mich

[Tesla DeLorean]

Not sure it's a configuration thing. Empty fields simply more to do with  "nothing to report", in that the RF side, and signal from the antenna simply isn't working as required. Default configuration for GNSS is to usually "Just Work", and then you might be able to reduce usable satellites via mask angle, or minimum CNO thresholds, etc.

Do you have the module built into something with an SMA connector? Does the center pin have a DC bias (around 3V typically) to power an active antenna?

Would recommend starting with some known working hardware, so you can do substitution testing to see what works and doesn't work and reduce the number of variables.

The u-Blox ANN-MB1 (AMO is the OEM Manufacturer) would be a good L1/L5 reference antenna with both multi-band, and wider bandwidth. Beitian / TOP-GNSS also has a wide selection of L1/L2/L5/L-Band antennas

>>I updated it on an ST employee advice....

Find the ST Rep or FAE responsible for your account, or business region..

[mich35]

No SMA connector, directly on the PCB, around 4cm track.

Once again this message was not present before the firmware update.

Positions seem OK now but how can I trust a module which send error message?

What's more I configure many constellations but I still have messages starting by $GP... while datasheet indicates TlakerID GN: If system works in multiconstellation mode. How can I configure multiconstellation mode?

I already have :

$PSTMSETPAR,1227,0xbc0003d5*06

$PSTMSETPAR,3227,0xbc0003d5*04

[Francesco Virlinzi]

Hi 

 - GBS messages are information the module reports

If you don't want see it you can use the following script:

$PSTMSETPAR,1228,0x2000,2

$PSTMSAVEPAR

$PSTMSRR

In general the message-lists is managed in CDBs 201-228 (not 227)

In CDBs 200-227 you can enable/disable features. In details to enable/disable constellations:

Configuration	Enable command	Disable command
1.GPS	$PSTMSETPAR,1200,0x410000,1	$PSTMSETPAR,1200,0x410000,2
1.Glonass	$PSTMSETPAR,1200,0x220000,1	$PSTMSETPAR,1200,0x220000,2
1.Galileo	$PSTMSETPAR,1227,0xc0,1	$PSTMSETPAR,1227,0xc0,2
1.BeiDou	$PSTMSETPAR,1227,0x300,1	$PSTMSETPAR,1227,0x300,2
1.QZSS	$PSTMSETPAR,1200,0x840000,1	$PSTMSETPAR,1200,0x840000,2
1.IRNSS	$PSTMSETPAR,1227,0x18000000,1	$PSTMSETPAR,1227,0x18000000,2
2.Save on flash and 3.Reset	$PSTMSAVEPAR $PSTMSRR	$PSTMSAVEPAR $PSTMSRR

> IRNSS supported on dedicated firmware online 

whatever your configuration is... the position is reported in GPGGA 

Hope this helps

[mich35]

Francesco,

Yes it helps.

Could be that the GBS was off by default in previous firmware.

Could you confirm that an "empty" GBS message means ok?

$$GPGBS,135241.000,,,,,,,*5F

According to UM3009 table 24 GGA, TalkerID is GN: If system works in multiconstellation mode. Could be a document error.

Mich

[Tesla DeLorean]

>>Could be that the GBS was off by default in previous firmware.

Or just no implemented.

>>Could you confirm that an "empty" GBS message means ok?

Hard to tell you're not really providing enough context about what satellites the receiver is seeing, or the type of solution it is able to develop. Show a more complete set of NMEA sentences over a couple of seconds.

[mich35]

Hello,

The teseo GNSS is outside, on the roof of the car.

I linked the Teseo GNSS to your Teseo-Suite Pro tool.

I requested the configuration with your Teseo Suite and the result is :

$$PSTMSETPAR,1227,0xbc0003d5*06

But as shown, your teseo GNSS can only see GPS satellites:

How is it possible that only GPS satellites are seen?

Is there any other configuration to check?

Once again, previously to this firmware update, GGA messages were GNGGA and not GPGGA only..

I attached the log file with the GSV messages.

Best regards.

Mich