To determine if your Iris is not connected to your transmitter, please follow the next steps:
1.- First, you can connect your IRIS to your computer using the micro USB port on it's side.
2.- Once connected you can open the Mission Planner software ( Download Link )
3.- After selecting the correct port on the top right corner of the screen, click on the ''Connect'' Icon.
4.- After that, go to the ''Initial Setup'' Tab and go to the Radio Calibration Menu ''.
5.- Here you should see some gray cylinders with green bars inside. These bars should move when you move the Transmitter's sticks around. If this happens, it means that there is a connection between your transmitter and your receiver. If it doesn't happen, it could mean that there is no connection between them.
If there is no communication between the two devices, you can do the binding procedure in order to bind your Transmitter with your receiver. Here you can find a tutorial video on how to do this.