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Problem with subscriber

indigo

asked 2018-08-15 06:41:00 -0500

ameni
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updated 2018-08-15 08:21:28 -0500

PeteBlackerThe3rd

flag of United Kingdom of Great Britain and Northern Ireland

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HI, I'm using a roboteq magsensor, and I want to read data from. so I'm going to use Roboteq Linux API to interface one the sensor form a C++ ROS node through CANbus . The problem is I didn't come to know how to work: it's only one node that's gonna read from the sensor , how to use topic in this situation ?

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answered 2018-08-15 07:06:07 -0500

Airuno2L

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A node that reads sensor data is usually just a publisher, not a subscriber.

This node will use the Roboteq Linux API to read the sensor data, then it will publish that sensor data to the ROS network in a topic.

Then if you want to use that sensor data for something, you would write a separate node that subscribes to that topic.

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Okey, a publisher node will read sensor data using Roboteq Linux API,

My problem is: I didn't come to know how to implement the API, especially when i don't know how the node will read data , because i don't know how to use the "topic" in this situation