Teseo-LIV3F's velocity field, is it on 3 or 2 dimensions?

[frontinus]

I am working with the Teseo-LIV3F GNSS module, I would need to know whether the velocity field it produces, which is a module, is calculated over the x and y dimensions only or x,y and z

Thanks for your help

[GalaxyQuest · Accepted solution]

Hi,

Could you please let me know which velocity field you are referring to? 

If it is GGA it is a compound value of velocity in x,y and z.

However, you can enable either $PSTMPV or $PSTMPVRAW to see individual values of velocity in x,y and z dimensions.

This snipped of instruction below enables both PSTMPV and PSTMPVRAW. You can just select one of them.

$PSTMSETPAR,1228,0x1,1
$PSTMSETPAR,1228,0x4000,1
$PSTMSAVEPAR
$PSTMSRR

[frontinus]

My excuses for this delay, in the meantime we managed to find that message, we needed the PSTMPV one, which indeed delivers the velocity on 3 axes

[GalaxyQuest]

Great ! Good to know that the problem has been resolved.

[jwe1]

Hello,

I am trying to configure PSTMPV to output, but not succeeding. This is what I do:

I can check ID 200 with "$PSTMGETPAR,1200*20", and get back "$PSTMSETPAR,1200,0x09e7165c*5A". I don't see anything specifically in the software manual on those settings that control if I can enable PSTMPV, but I figured this could be important.

When I send "$PSTMNMEAREQUEST,00000062,00000001*49", I get back a single PSTMPV message, and my unit happens to have GPS lock.

However, when I try to enable PSTMPV to the current configuration with "$PSTMSETPAR,1228,0x1,1*76", I get back "$PSTMSETPAROK,1228*3A", but PSTMPV is not ever sent. When I request the setting with "$PSTMGETPAR,1228*2A", I get back "$PSTMSETPAR,1228,0x00024001*5D", which indicates that PSTMPV should be sent. However, I am still not seeing PSTMPV. Is there some other setting to set or check?
If relevant, I am using Teseo-Suite Pro NMEA decoding tool to view and send these commands.

Thanks!

[GalaxyQuest]

Hi,

Can you please tell me which product you are using ? 

$PSTMPV is available in LIV3F/LIV3FL.

Please refer to my earlier message in the thread of enable $PSTMPV.

Also in the software manual, you can refer to $PSTMSETPAR command to only set the required bits by using the bit mask.

[jwe1]

I am using the TESEO-LIV3FL on a custom PCB.

I understand that it is supposed to support PSTMPV, and when I use the $PSTMNMEAREQUEST command, I get back a single PSTMPV message as a response.

My issue is that as far as I can tell the module is not working as expected. I think I am using the PSTMSETPAR command correctly, since when I send "$PSTMGETPAR,1228*2A", I get back "$PSTMSETPAR,1228,0x00024001*5D", which indicates that PSTMPV should be sent. However, I am not getting the PSTMPV message periodically. Are there any other settings that could impact this?

[GalaxyQuest]

Are you getting all the standard NMEA messages that you have enabled?

What is GNSS update/output rate?

If you are outputting GNSS message at a higher rate > 1 Hz, please ensure that you are using a higher baud rate. Just wanted to ensure that that all UART messages are being received.

In addition, if you are enabling a lot of NMEA messages and outputting at higher rate, ensure that CDB-130 clock divider is set to 1.

You can use 

$PSTMSETPAR,1130,0x0   //SET THE PARAMETER
$PSTMSAVEPAR           //SAVE
$PSTMSRR               //RESET for setting to take effect

I assume when you enable PSTMPV, you are saving and resetting the module.

[jwe1]

Thank you! I had not used the save and reset commands:

$PSTMSAVEPAR   

$PSTMSRR 

 Once I did those, I see PSTMPV output at 1Hz. Thank you for your help!

[jwe1]

Can you confirm the direction of the "vertical velocity" field? If my altitude is increasing, will I get a positive number for vertical velocity?