Alwinator
Posts: 2
Joined: Fri Aug 23, 2019 7:46 am

Long range interface between a Raspberry Pi and a smartphone?

Fri Aug 23, 2019 7:53 am

I would like to control a Raspberry Pi 4 with my smartphone (for my drone). Now I'm looking for an interface between the RPi and my Android phone.

Requirements:
  • Control with a web interface or app
  • Range: at least 1 km (0.62 miles).
  • Data rate: I don't need a high data rate, because I don't want a camera live stream. I only want to send small commands, like forward, backward,...
  • Fast connection -> max. 0.5 second: Phone -> RPi
  • No license (for special frequencies)
  • One-time purchase -> No monthly fees
Here are some that I have looked at, but do not meet my requirements:

Use a sim card for the RPi:
  • Websocket connection over a server -> web interface
  • Unlimited range
  • Monthly fees
Use the RPi as Access Point
  • Connect the phone with the RPi-Wifi -> web interface
  • I think: to low range
Connect my phone with a self-built antenna e.g. with RFM95W
  • Connect the antenna with USB-C to my phone
  • App
  • I must program a driver
Bluetooth
  • To low range
Thanks for your Hardware Recommendations!

two_socks
Posts: 6
Joined: Thu Aug 15, 2019 8:49 pm

Re: Long range interface between a Raspberry Pi and a smartphone?

Fri Aug 23, 2019 9:45 pm

I'm not an expert here,
but you already cut down the options, you have to use an antenna (but I have no idea about license for special frequencies).

To avoid to write a driver for the antenna, you can use a RPi Zero W (wi-fi connection to your phone) and using websocket to implement a protocol (or at least a form of communication).

Alwinator
Posts: 2
Joined: Fri Aug 23, 2019 7:46 am

Re: Long range interface between a Raspberry Pi and a smartphone?

Mon Aug 26, 2019 11:37 am

Thanks for all answers. I found the solution!!!

Please visit https://raspberrypi.stackexchange.com/q ... 866#101866 for the solution!

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