About ntrip client usage

[wqrray]

I can now get the correction data from ntrip client by launch a node and I can find a new "rtcm" node in the topic list, but how to use the correction data to do the correction for the position? The ublox_gps node seems unable to receive the correction data. I'm new to ROS, can you give me some hint on that?

[bjajoh]

I would also be very interested, did you find a solution on that one?

[bjajoh]

Ok, I got it working. You just need to put the correct topic for the callback in the source code.
ublox_gps/src/node.cpp

Change one of the las lines " param_nh.param("/ntrip_ros/rtcm_topic", rtcm_topic, std::string("rtcm"));
--> "/ntrip_ros/rtcm_topic" is the topic in my case.

[miellis]

Ok, I got it working. You just need to put the correct topic for the callback in the source code.
ublox_gps/src/node.cpp

Change one of the las lines " param_nh.param("/ntrip_ros/rtcm_topic", rtcm_topic, std::string("rtcm"));
--> "/ntrip_ros/rtcm_topic" is the topic in my case.

This fixed it for me thanks alot!

[yulan0215]

I can now get the correction data from ntrip client by launch a node and I can find a new "rtcm" node in the topic list, but how to use the correction data to do the correction for the position? The ublox_gps node seems unable to receive the correction data. I'm new to ROS, can you give me some hint on that?

Hi, I launched the ntrip file but there was no data come, always the zero length data problem. Do you know what is the problem? Thx

[euge2838]

I can now get the correction data from ntrip client by launch a node and I can find a new "rtcm" node in the topic list.

@wqrray @bjajoh Could you share the configuration? launch file and ntripclient.py file (assuming you used those).
How the output you receive from the caster/service looks like?
Thanks

UPDATE
The main issue was to be using Python 2.7 instead of Python 3.