Parse rostopics to JSON

edit

the rosbridge_suite does send arbitrary ROS topics to e.g. websockets in a json format. You could check out the implementation there, seems like this file might be a good start. Follow the extract_json_values function...

Or use rospy_message_converter which supports msg <-> JSON conversion as well.

And this reads a bit like a duplicate of #q196365.

Thank you so much for the answer.

I have used rospy_message_converter as stated below, it works well :) Now I would like to send the topics that are in json format to RabbitMQ, how can I do that?

Thank you :)

#!/usr/bin/env python

 import rospy
 from rospy_message_converter import json_message_converter
 from sensor_msgs.msg import Imu


 def ImuJsonCallBack(imu_data_):
       imu_json_ = json_message_converter.convert_ros_message_to_json(imu_data_)
       print("\n")
       print(imu_json_)
       print("\n") 

 def main():
     rospy.init_node('ros2json', anonymous=True)
     rospy.Subscriber("/mavros/imu/data", Imu, ImuJsonCallBack)
     rospy.spin()


 if __name__ == '__main__':
    main()

Now I would like to send the topics that are in json format to RabbitMQ, how can I do that?

This does not seem like a ROS question any more.

I would suggest you post it on a different forum.