Q: Hello! I want to subscribe data from .msg file. However the file has four other msgs inside. The format of the .msg file is:

Could you tell me how to read, for example, x,y,z coordinates inside geometry_msgs/Vector3?

A: I’ve created a custom msg (msg/mycustom.msg) in my package called mypkg, created a publisher and 2 subscribers, one in python, another in cpp. You can see below: