2.4 GHz

Everything here is wide. One Wi-Fi channel is 20 MHz and DJI DroneID wants 15.36 MS/s, which is why this band is the dividing line between a dongle and a HackRF or LimeSDR.

It is also the band where the channels view earns its keep: 802.15.4 channels sit underneath Wi-Fi ones, so a Zigbee mesh that keeps dropping is usually parked under an access point, and the view says so in one glance.

$ waveshark --tune 2437 --span 20000 --channels

What lives here

• Bluetooth LEAdvertising packets on all three primary channels, Bluetooth 5 Long Range included, with Open Drone ID read where it is carried.
• Wi-Fi802.11a/g/b and single-stream n: network names, the addresses talking, the rate each frame arrived at and whether an address is randomised.
• Zigbee, Thread and MatterThe 802.15.4 layer under all three stacks: the addresses talking, the networks they belong to and the channel each sits on.
• Drone Remote IDA drone’s serial, position, height and operator location, from the Remote ID broadcast it is required to send, and the home point from a DJI airframe.
• RC control linksWhere the sticks are on every model control link in earshot: a bar per channel in microseconds, with the frame rate and whether the handset is asking to arm.