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I am building a quadcopter and I am searching for a communication module for the raspberry pi, which can send big data over long range.

I need a module with a range of approximately 1 - 2 km range, a daterate of 1,500 - 4,000 KB / second (for video streaming) and RSSI support.

I know that this is possible, because the DJI Marvic Pro 2 drone is able to create a video stream in Full HD (1920 x 180 pixels) up to 8 km.

In the best case: The module creates a livestream of 1280 x 720 pixels.

Realistic: 480 x 852 pixels (in case of need, less) are also ok.

I think the best frequency is between 1.2Ghz and 5.8Ghz (This is also a license-free ISM band)

Here are some that I have looked at, but do not meet my requirements:

SI4432

  • RSSI: yes
  • range: 1.5km
  • rate: 256KB / s

RFM95 oder RFM98

  • range 2.5km
  • RSSI: yes
  • rate: 300KB / s

SX1276

  • range 5 km
  • RSSI: yes
  • rate: 5KB / s

HC-12

  • range: 1.8km
  • RSSI: no
  • rate: 5000 KB / s

Thanks for your recommendations!

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  • DJI streams video as analog signal. And it does not stream it as HD (it records it in HD). Any LRS uses analog signal. There are few systems for HD video downlink but it costs a lot. Use any 5.8 Ghz 800mW and you will get what you need. Record video onboard.
    – Mike Petrichenko
    Aug 26, 2018 at 9:01
  • @MikePetrichenko Thanks for the helpful information. I have done a lot of research and discovered that in the country where I live (Austria), in 5.8GHz only up to 25mW are allowed. How far is the signal with 25mW?
    – Alwin
    Aug 26, 2018 at 9:53
  • Depends on anthenas, enveronment and other things. But not too far. Take a look on 1.2 or 2.4 GHz. Any way, for long range you should stay with something 200mW and more.
    – Mike Petrichenko
    Aug 26, 2018 at 10:07
  • By thew way, you can try this one. It has changable power from 25mW to 200mW (HV and V2 versions up to 800mW) so it feets your country limitations but you can switch it to high power when needed. If you use Spektrum TX and RX you can do it over the air on the fly.
    – Mike Petrichenko
    Aug 26, 2018 at 10:11
  • Just price info (thi is not the best one): flyingtech.co.uk/fpv-camera-gimbals/…
    – Mike Petrichenko
    Aug 26, 2018 at 10:19

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