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I need to send information to ROS through a Service.

Do you mean sending information to your ROS Service?

Let's say you have a ROS Service server that needs a text message to serve a request. You can use the ZeroMQ library to send the information from your C++ code. There are various tutorials available online. You may also check ros_zeromq_tutorial.

I need to send information to ROS through a Service.

Do you mean sending information to your ROS Service?

Let's say you have a ROS Service server that needs a text message to serve a request. You can use the ZeroMQ ZeroMQ library to send the information from your C++ code. There are various tutorials available online. You may also check ros_zeromq_tutorial.