Error "Detected 0 radio channels. To operate PX4, you need at least 5 channels"

Pixhawk
7

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IMG-20190104-WA0004.jpg1080×810 112 KB

IMG-20190104-WA0003.jpg810×1080 138 KB

I’m not sure what this is for:

IMG-20190101-WA0009.jpg810×1080 84.6 KB