@martongonczy There's a few different places to start troubleshooting. To follow the pipeline, first make sure camera data is flowing (voxl-inspect-cam -a). Ensure the streamer is configured to use the correct pipe (systemctl status voxl-streamer), Ensure the computer running QGC can see the drone over the network, can you ping your VOXL's IP address? Then check QGC settings, are you using the correct URI and port (default port is 8900)?