FlytSIM is a ROS-Gazebo environment where you get a simulated version of your drone application. It is a great tool to test your drone app before the first flight. FlytSIM gives you an idea how your drone will behave in the real world.

You can find the step-by-step guide to install FlytSIM here.

Every app you develop using FlytSDK will require you to enter the IP address of the device running FlytSIM(usually your laptop).

After installing FlytSIM, run it on your system and connect it to your Wi-Fi network. Connect your phone to the same Wi-Fi network and launch your app.

Now, you can start testing your application in the simulation environment.

While testing, be sure to check all the functionalities as it is a great way to find out bugs/errors if any.