Questions tagged [radio-frequency]

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How does Herelink achieve 20km range with 1080P video streaming quality?

According to the HereLink manual. It uses 2.4ghz frequency for wireless communication and claims video streaming in 1080p up to 20km range. How is this possible? If it can transmit up to 20km then it ...
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3 votes
1 answer
67 views

Help getting this flight controller to work with this receiever

I am working on building a drone. I have the DJI NAZA M LITE flight controller, and this receiver. The pinout for the battery and ESCS is pretty clear, but I'm not sure how I should go about ...
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2 votes
0 answers
53 views

How to communicate with about 1 km range?

How can I set up a communication link between some drones that can be 1 km away from each other? The communication should be done by broadcast (Ad Hoc) and not point to point. What type of transmitter/...
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3 votes
3 answers
161 views

Could using a 2.4GHz controller frequency interfere with an onboard computer trying to access 2.4GHz WiFi networks?

My situation is this: I will be building a quadcopter drone (and later a hexcopter) that will most likely use 2.4GHz RC with a Pixhawk. I will also have a computer onboard (Raspberry Pi, either 4B or ...
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1 vote
1 answer
60 views

Which frequency band protocol to be used for fixed wing gliders?

I am designing an autonomous glider. I am also adding a provision to manual override the glider. I want to understand which frequency would be perfect for RF module or transmitters and receivers, so ...
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2 votes
3 answers
185 views

Is it possible to hijack a quadcopter?

Is it possible to hijack a quadcopter? Like an attacker would jam the controller's signals and send his/her own signal to controll the drone. If so, what would be the technical steps?
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4 votes
1 answer
923 views

Ftd driver for 3dr telemetry radio

I have been attempting to connect my pixhawk 4 to qgroundcontrol using an old 3DR telemetry radio set. The connection works fine over usb, but qgroundcontrol shows disconnected when I plug in both ...
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  • 309
5 votes
1 answer
61 views

Should VTX ever be lower freq./higher power than the control transmitter?

I can find video transmitters from 5.8GHz down to 433MHz with the latter being ideal for longer range, but I don't see nearly as much diversity as far as control transmitters. Am i correct in saying ...
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4 votes
2 answers
1k views

Why is 900 MHz better for long range than 2.4 GHz?

There are various transmitter modules like the FrSky R9M system which operate at around 900MHz rather than the more commonly seen 2.4GHz. Why is 900MHz better for long range drones, and why is 2.4GHz ...
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  • 5,532
5 votes
3 answers
1k views

What technology offers the longest range for RC controls?

After watching a video demonstrating a jet-powered RC aircraft, I started to wonder about the maximum range available with modern RC equipment. What is the maximum range currently available, and ...
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4 votes
3 answers
1k views

Why is 5.8ghz used for FPV and 2.4ghz use for transmitters?

Why do most VTXs use 5.8ghz and most transmitters use 2.4ghz?
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