2 arduinos talking to each other via Ham rádio?

Hi!

I'm not sure if someone here have heard about it.. but...

Is it possible to 2 arduinos talk to each other usiond audio ?

I wanted to use the audio from 2 ham radios because the distance is about 10km and there is no tx/rx that could do the job.

Does anybody have any idea?

tks

What's your call sign?

I am not a ham but would suggest the licence conditions should be read before sending data via a voice service.

I have come across long distance Tx/Rx data systems for this distance using reasonably priced modules. I can't remember details though.

Weedpharma

Even if you are a ham, you should check the band plan for your country. In the USA, ham bands have special sub allocations for data and voice modulation within each band. In Canada, there is no legal requirement to follow a band plan, but hams follow the same general allocations by "gentleman's agreement".

Also, "ham radio" covers frequencies from several tens of kilohertz to several gigahertz. The applicability of any of those bands to cover a distance of 10km. depends on many factors such as frequency, antenna gain, propagation path conditions, and so on. So one shouldn't just stumble blindly into it. Even if one is a ham.

There are also restrictions on "automatic" or unattended stations. These are exceptions to the normal rule of transmission, which is that a license holder must be in direct control of the station when it is transmitting.

Hi everyone!
First of all I appreciate your answers...

Actually here in Brazil where I live I have a ham license and specifically I know certain frequencies dedicated to data package but I am not sure if it can be automatically operated..

In case I can operate, is it hard to build a DIY systems using ham based station?

Tks a lot.

In addition to what aarg said, there are a host of other factors to consider as well. Personally, I would drop the audio idea and use CW instead. US licensing allows for automated control of CW signals (e.g., sending a call sign via a keyer from its memory) plus there are other digital modes available. There are a number of CW decoder plans (e.g., Arduino Projects for Amateur Radio), however, their success is dependent on the "quality" (e.g., "fist") of the sender. W1AW, for example, sends perfect CW up to 18 words per minute (wpm), but changes to Farnsworth encoding from 18wpm up. If you design a "perfect" sender, the decoder could work reliably, given the limitations aarg mentions.

W8TEE

econjack:
In addition to what aarg said, there are a host of other factors to consider as well. Personally, I would drop the audio idea and use CW instead. US licensing allows for automated control of CW signals (e.g., sending a call sign via a keyer from its memory) plus there are other digital modes available. There are a number of CW decoder plans (e.g., Arduino Projects for Amateur Radio), however, their success is dependent on the "quality" (e.g., "fist") of the sender. W1AW, for example, sends perfect CW up to 18 words per minute (wpm), but changes to Farnsworth encoding from 18wpm up. If you design a "perfect" sender, the decoder could work reliably, given the limitations aarg mentions.

W8TEE

hi!
I think thats a new patch to walk to!

I'll read more about this CW systems... Seems like it will work!

thank you all very much!

Regards