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GNSS positioning

Ask questions and find answers on Teseo GNSS positioning solutions. Discuss NMEA sentences, SBAS activation, and signal troubleshooting.

  • 299 Topics
  • 1,015 Replies
299 Topics
tpasVisitor II
 GNSS positioning
bofhAssociate II
 GNSS positioning
LIV4F less sensitivity compared to MAX-M10S?

Hi all,to evaluate LIV4F and MAX-M10S, I use Mikroe "GNSS 9" and "MAX" click boards with a passive antenna (Quectel YEGT001W1AM).While the MAX click board with the MAX-M10S gets a fix in less than one minute, the MAX 9 board with the LIV4F doesn't get a fix. Even when starting with an active antenna to get a fix and then switching to the passive antenna, the LIV4F stops operating. Sporadically, the GSV sentence shows then one or two weak (~20) signals while the MAX-M10S has >10 satellites with signals in the range 20..44.From my understanding of the data sheets, both the LIV4F and MAX-M10S should have similar performance without an external LNA, isn't it?Is there any known issue with the Mikroe GNSS 9 click board?Or a possible misconfiguration of the LIV4F I could fix? 

6703
YegorAssociate
 GNSS positioning
EGola.1
EGola.1Associate
 GNSS positioning
YegorAssociate
 GNSS positioning
peternpcbAssociate
 GNSS positioning
abartky
abartkyAssociate II
 GNSS positioning
Virtual_COM_Port with X-NUCLEO-LIV4A1A works NUCLEO-F4XX fails on NUCLEO-U575ZI-Q

I've been trying to get the Virtual_COM_Port app running on the combination of X-NUCLEO-LIV4A1A and NUCLEO-U575ZI-Q board and the best I can get is where the app will successfully output the first second's group of NMEA messages to the PC running a terminal emulator program and then it stops.  After it stops, the actual LIV4 module on daughtercard cotinues to run as you can see the RED LED blink pattern change.This happens in all three cases where I:Try running the pre-compiled build of Virtual_COM_PORT .bin file for the U575XI baord under the repository folder.Build the example project under STM32CubeMX, code generate it for STM32CubeIDE, build it and load it to the U575ZI board and run it (either in run or debug mode).NOTE: In this case, I do get one compile warning where I complains about a missing .c file in the Src folder (worked around this by finding it in a different folder, copying and build).Follow the steps in the GNSS1 FW getting started guide and manually setup the pr

4122
PaulNusserVisitor II
 GNSS positioning
Teseo-LIV3F/Teseo-LIV4F

I have been working with both the Teseo-LIV3F and Teseo-LIV4F GNSS Modules. The Liv3 software datasheet contains all of the information I needed to set up that module. The Teseo LIV4 software datasheet is much shorter and seems to be missing some of the content that is in the Liv3 datasheet. Some of the settings such as the FIX RATE, are documented in the LIV3 datasheet, and work the same on the LIV4. But some of the features such as the CPU statistics message, or setting the CPU FREQ, are documented in the LIV3 and work for the LIV3, but do not appear to work the same for the LIV4. I also noticed that the LIV4 has many fields marked as reserved, which the LIV3 has details for and options to enable. Are all of these reserved fields, functions that are not available on the LIV4? For example trying to turn on the  $PSTMCPU message on LIV4 does not work, but that field is also marked as reserved. I also wanted to ask about the constellation combos. We have been keeping it at the

2961
DMeie.2
DMeie.2Associate III
 GNSS positioning
HAO1Associate II
 GNSS positioning
Teseo-VIC3DA return unstable raw value from 2 message $PSTMDRSENMSG,30 and $PSTMDRSENMSG,31

Dear ST Team,After successfully setting Teseo-VIC3DA module, we can get message 3 digital axes accelerometer($PSTMDRSENMSG,30) and message 3 digital axes gyroscopes($PSTMDRSENMSG,31) which are returned from Teseo-VIC3DA HW at 15Hz speed. However, 3 raw data raw_x, raw_y, raw_z are unstable eventhough Teseo-VIC3DA is standstill.For more details, please help to refer to 2 attached logs: PSTMDRSENMSG_30.log and PSTMDRSENMSG_31.logOur question here is: why can we not get stable raw value? Do we miss any setting for getting such stable value? Please kindly help to support. Thank you. Please note that, we use below settings:"$PSTMSETPAR,1228,0x2000,2*46\r\n"; //Disable $GPGBS"$PSTMSETPAR,1228,0x40000,2*70\r\n"; //Disable $PSTMODO"$PSTMSETPAR,1228,0x800000,2*4C\r\n"; //Disable $PSTMDRGPS+$PSTMDRSINT+$PSTMDRCAL"$PSTMSETPAR,1228,0x20000000,2*46\r\n"; //Disable $PSTMDR1+$PSTMDR2"$PSTMSETPAR,1228,0x10000000,1*46\r\n"; //Enable $PSTMDRSENMSG"$PSTMSETPAR,1684,10*11\r\n"; //Set speed

4331
HAO1Associate II
 GNSS positioning
Brendan1007Visitor II
 GNSS positioning
Donald11Visitor II
 GNSS positioning
HAO1Associate II
 GNSS positioning
Teseo-VIC3DA can not return Magnetic information via msg: $GPRMC

Dear ST Team,Our application need Magnetic information which is returned via message called $GPRMC as format below: $GPRMC,<Timestamp>,<Status>,<Lat>,<N/S>,<Long>,<E/W>,<Speed>,<Trackgood>,<Date>,<MagVar>,<MagVarDir>,<mode>*<checksum><cr><lf> However, Teseo-VIC3DA inside our Testbench can not get such information even after long hours of testing, please kindly refer to attached log file for more details and by the way please kindly guide us how to setting Module for getting such information. Thank you.Here is short extraction:$GPRMC,091446.200,A,1051.01966,N,10647.92288,E,0.1,0.0,111225,,,D*62$GPRMC,091446.300,A,1051.01967,N,10647.92288,E,0.1,0.0,111225,,,D*62$GPRMC,091446.400,A,1051.01967,N,10647.92288,E,0.1,0.0,111225,,,D*65$GPRMC,091446.500,A,1051.01967,N,10647.92288,E,0.1,0.0,111225,,,D*64$GPRMC,091446.600,A,1051.01967,N,10647.92288,E,0.1,0.0,111225,,,D*67

4000
BillFrierVisitor II
 GNSS positioning
RF Front End for LIV3F(L) / LIV4F schematic confirmation

I'm looking at using the Teseo modules in a range of RC boats but would like some final confirmation of the RF front end to make sure I am not doing anything wrong.  For the LIV4F I have boiled it down to this setup, with the understanding that the 4F can drive active antennas directly (for external use), and for passive there is an onboard LNA that needs a blocking cap (for mounting on the same PCB).  Thanks for any help! For the LIV3F(L) I am looking at exclusively active antennas (given the lack of on board LNA). From the RF front end point of view does this make the 3F and 3FL pin compatible?Is this the correct setup for both onboard and offboard antennas?Only the offboard has a current limit on the assumption that helps save the RF front end when there is no antenna fitted, is that correct?Are there any recommended part numbers for the inductor/capacitor bias?Do I need a saw tooth filter on the RF input?Why are the Liv4f's seemingly always out of stock?&nb

4000
albs975Visitor II
 GNSS positioning
HAO1Associate II
 GNSS positioning
It is not possible to use all the commands mentioned in UM2791 for VIC3DA

Hi everyone,I am having trouble with the Teoseo VIC3DA GNSS module:My project is using the Teoseo VIC3DA to obtain information about GPS, gyroscope, and accelerometer, but in the default mode, I cannot see any data from the gyroscope or accelerometer. Therefore, I have tried sending the following commands:Tried to read Gyro data$PSTMDRSENMSG,31*<checksum>$PSTMDRSENMSG,30*<checksum>I even tried enabling/disabling the PSTMDRGPS message according to table CDB-ID 228 - NMEA message List 0 with the following commands:$PSTMSETPAR,1228,800000,1 (enable message PSTMDRGPS in current config)$PSTMSETPAR,1228,800000,2 (disable message PSTMDRGPS in current config)=> The Teoseo VIC3DA still does not change (I have also tried enabling/disabling other messages according to table CDB-ID 228).Only the $PSTMGETSWVER command receives a corresponding response.Additionally, I would like to provide you with the log from the GNSS module starting from the moment the Reset was triggered at attach

5032
ZSade.1
ZSade.1Associate II
 GNSS positioning
leofocuyAssociate II
 GNSS positioning
MiJes
MiJesAssociate
 GNSS positioning
RGOrdeigAssociate II
 GNSS positioning
MiJes
MiJesAssociate
 GNSS positioning
RGOrdeigAssociate II
 GNSS positioning
sky_1Associate
 GNSS positioning
Teseo III changing baud rate and a hopefully basic question

Hello,I'm using a Teseo III module from Lantronix. When connected up, I can see NMEA sentences over UART, at 9600 baud.I have a few questions. I'm not a GPS expert, and unfortunately, the Teseo III documentation assumes quite a bit of knowledge.Question 1: What command should I send to be able to temporarily either stop, or slow down the NMEA sentences? I'd like to stop them, so that I can type commands to experiment, and see the responses without the flood of NMEA sentences.Question 2: How do I change to 115200 baud?I have tried issuing the following commands at 9600 baud, but I can't see the responses, because there's so much NMEA sentence activity ongoing.$PSTMSETPAR,3102,0xa*32$PSTMSAVEPAR*58$PSTMSRR*49After issuing those commands, the baud rate doesn't change. I still see NMEA sentences at 9600 baud. The particular module I'm using is Lantronix PNT-SG3FS and their documentation is almost identically a copy of the ST Teseo III documentation.  Thanks in advance f

31261
JDahl.15
dl2Explorer
 GNSS positioning
TESEO LIV4F low power

Hello,  I am currently using the EVB-LIV4F and using page 8 of the UM3212 document to measure the current draw of the module. I am then placing it into SW-standby mode by sending the $PSTMFORCESTANDBY,<seconds>,1 command that I found on this post: https://community.st.com/t5/gnss-positioning/teseo-liv4f-wakeup-interrupt-and-nreset-confusion/td-p/615973 Under these conditions, I am measuring 0.0mV on the VCC (pin #9) and PM_VCC (pin #10) pins and 9.1mV on the VBAT (pin #7) and PM_VBAT (pin #8) pins. From the conversion given, the GNSS module is drawing 91uA on VBAT and not the advertised 10uA. Does the evaluation board need to be in a specific configuration to achieve the 10uA? Any jumpers that need to be added/removed?Where is the documentation on the placement of jumpers? The eval board silkscreen does not have all jumpers labelled (Jxxx) and neither does UM3212 section 6.2... 

18552
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