Questions tagged [radio-frequency]

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Determining Typical Bandwidth for 2.4GHz Radio Control in Drones for FPV Camera Data Transmission

I'm working on a drone project that involves transmitting FPV (First Person View) camera data using a 2.4GHz radio control system. I'm trying to calculate the potential delay in transferring this ...
hunterlineage's user avatar
1 vote
1 answer
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Why does ELRS use only radio modules with SPI control and UART?

I've seen official ELRS guides for building DIY RX/TX modules. Many of them offer to use SX12xx modules with the SPI pinout. However, I've seen the same modules but with UART control only. Any reason ...
Secret-guy's user avatar
1 vote
1 answer
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How do i make 2 Cetus X Drones use different frequencies, so I can fly them at the same time?

Me and my friend both have a Cetus X Drone. We want to fly them at the same time, however both the video and the controller signal interfere. As a controller I use the BetaFPV LiteRadio that came with ...
Ehrenmann's user avatar
1 vote
1 answer
233 views

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 ...
Nirmal Yohannan's user avatar
3 votes
1 answer
124 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 ...
Simon Fox's user avatar
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2 votes
0 answers
88 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/...
jenifer's user avatar
  • 21
3 votes
3 answers
733 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 ...
Michael Bonnet's user avatar
1 vote
1 answer
78 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 ...
Karnik Kanojia's user avatar
2 votes
3 answers
246 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?
J_Sig's user avatar
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4 votes
1 answer
2k 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 ...
figbar's user avatar
  • 309
5 votes
1 answer
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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 ...
Galaxy's user avatar
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4 votes
2 answers
3k 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 ...
Jacob B's user avatar
  • 5,802
5 votes
3 answers
4k 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 ...
End Anti-Semitic Hate's user avatar
4 votes
3 answers
4k 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?
Jacob B's user avatar
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