U-center NTRIP Connection Problem

Q&A forumCategory: QuestionsU-center NTRIP Connection Problem
andy-parke asked 2 weeks ago

I am trying to connect to rtk2go.com port 2101 via the u-center interface (NTRIP Client…), but it seems to behave badly.
The aerial is plugged into the board (rover) and placed outside, the computer’s USB is plugged into the rover’s Power + GPS socket, with u-center running on the PC. U-center displays my location and the satellite connections etc.
Looking at the NTRIP connection logs, I see the following cycle:
a) connection to the server is established,
b) some data is downloaded,
c) a connection error occurs,
d) the connection is dropped.
Repeat…
1) Has anyone experienced this before?
2) When the connection is working properly, I assume the connection does not get dropped. Is this correct?
3) Could this be that I have chosen an inappropriate NTRIP mount point (either the wrong protocols or the data is not being published)?
4) Should the connection still work (not error) if I choose a mount point that is too far away (although maybe the data is not useful)?
5) What effect does it have to use a mount point really far from the rover?
6) When functioning correctly, how often is data sent?
7) When functioning correctly, what does the data look like?

11 Answers

I have check it again , it still working .
 

This is the steps i did : 
See the quick video i have made here : https://youtu.be/rvtrCS4gLHo
 
 

I used USB-to UART TTL module to check repond back from TX to RX.
Connect the TX to RX like this , then plug to computer. Open U-Center. 
https://esprtk.files.wordpress.com/2019/07/check-ntrip-client-on-ublox-center-rtk2go.com-esprtk.png
#0 Go to this link to check status server and your mountpoint :  http://rtk2go.com:2101/SNIP::STATUS
#1 : Select Baudrate and COM, please choose baud from 115200 to Higher.
#2: Configure NTRIP Client: 

  • IP : rtk2go.com
  • Port : 2101
  • Other : (just skip)

Then click OK.
https://esprtk.files.wordpress.com/2019/07/step_1_check_ntrip_client_ublox_cneter_esprtk.png
 
https://esprtk.files.wordpress.com/2019/07/step_2_check_ntrip_client_ublox_cneter_esprtk.png
https://esprtk.files.wordpress.com/2019/07/step_3_check_ntrip_client_ublox_cneter_esprtk.png
 
https://esprtk.files.wordpress.com/2019/07/step_4_check_ntrip_client_ublox_cneter_esprtk.png

Ah, and the mounpoint in the video below is YUMEFARMF9

Sorry:
At step0 :
#0 Go to this link to check status server and your mountpoint :  http://rtk2go.com:2101/SNIP::STATUS
Now Check status connection to server : 
https://esprtk.files.wordpress.com/2019/07/step_5_check_ntrip_client_ublox_cneter_esprtk.png
 
As you asked :
When functioning correctly, how often is data sent?
 Look at the STR string :

STR;NDS-WTM-MR;Werdum;RTCM 3.2;1005(1),1074(2),1084(2),1094(1),1230(1);;GPS+GLO+GAL;SNIP;DEU;53.65;7.74;1;0;sNTRIP;none;N;N;3740;;

Here is the type RTCM message are streaming : 1005(1),1074(2),1084(2),1094(1),1230(1) at 1hz-2hz-2hz -1hz-1hz
At the second (from the end) STR string is speed at Bit per second of that stream (3740 bps)
When functioning correctly, what does the data look like?
https://esprtk.files.wordpress.com/2019/07/step_6_check_ntrip_client_ublox_cneter_esprtk.png
 
When we connect TX to RX like cuircuit above, all data output will received on RX port.Click to ‘Packet console” to see detail :
https://esprtk.files.wordpress.com/2019/07/step_7_check_ntrip_client_ublox_cneter_esprtk.png
 

andy-parke answered 2 weeks ago

Thanks, that’s an amazing answer with lots of detail!
I have now managed to receive RTCM data by using the mount point that you selected YUMEFARMF9. It seems that my closest mount points don’t work with the u-center NTRIP client. I tried to see if I could understand why some work and some do not. I did not find any pattern. The closest mount point to me that I have found to work is about 80km away. This still appears to improve the accuracy of the fix location, so is worth using. I shall try to find closer mount points using other networks to see the improvement in output data.