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Arduino long range communication???

Former Member

Dear community,

 

I need to develop a long range (5 kilometers) communication system with two arduinos. I've used Digi Xbee Pro 2.5 modules but  communication is not good enough. I would like to know what another posibilities I have.

 

Regards

  • 0

    A directional antenna with a boosted power output will extend WiFi over several kilometers. It's a practice already done today.

     

    Start there.

     

    If line of site is possible, try infrared or laser communication.

     

    E

  • 0

    Hi Joaquin,

     

    If you are doing this in a setting where internet is available, you could try that route maybe?

     

    Cheers,

    -Nico

  • 0

    knowing nothing at all about your project, does it have to be continual data, or on demand?

    if it`s the latter, you could consider using a GSM module such as the Siemens TC35.

    then distance is no object at all image

  • 0

    I had good success in using a couple of arduino mega2560s to control some cobra personal radios (walkie talkies), and interface to sensors and actuators miles away.  Line of sight, it was tested from my home to an 11,000' peak 17 miles away, with no data errors.  It may have a range twice that.  But deep in the suburban trees and houses, the range is only 1-3 miles.

     

    I used a holtek HT9200B  DTMF encoder to generate audio for transmission and a cmd CM8870 decoder to convert it back into a 4 bit word at the receiver.  Because of the shitty audio quality of these radios, two of the DTMF codes were dropped.  That still allowed me to use 10 codes for data (decimal number system), a code for start bit, one for stop bit, and an extra.  This has been more than enough for eleven channels of remote sensors and 4 actuators in duplex communication every few seconds.  There are a world of interesting hacks that can be done adding arduinos to radios like these, and you can get involved with stuff like repeater arrays, remote programming, feed lines and antennas, encoding.  It was lots of fun.  But be aware that after you develop this great system, you'll find the weak link is the radios so choose them well.