I'm trying to set up the example project that i have cloned from the following repository :
https://github.com/MathiasCiarlo/ROSBridgeLib
I have followed the instructions to create a project in unity and create the mentioned scripts. As per the documentation provided, the c# script is supposed to give out a JavaScript Object Notation string which is used to publish a topic into ROS, however I'm not able to achieve this. I am sending the JavaScript Object Notation string over the 9090 port but ROS is not receiving it.

Please do point out what I'm doing wrong.

Thanks in advance!!!

// RollABallRosController - First script
   https://drive.google.com/open?id=1clH22tGOwfGYnNxnQBBJDyXJY7HMF-NB

// ROSBridgePublisher - Second script
https://drive.google.com/open?id=1znTDT4w5pzXsygNbACWBcxY6fPkNgUOr

//ROSBridgeSubscriber - Third script
https://drive.google.com/open?id=1PgrKF6GqlWj4suo4sKpGDwTNBbkqTk0R