21 Dec '12, 3pm

Open source software defined radio transceiver

Oh, come on, ISM, radio in a black box, that’s no fun! Sure there is telemetry on HF! Ocean buoys use it all the time! There is even telemetry on HF in the form of HF APRS! That being said, it would be very bad form to use HAM BAND HF for this kind of telemetry. You really only need to reach one digipeater which is or can forward your packet to one iGate and then your data is available from pretty much anywhere. With HF your packet could be received at every digipeater at the same time across 1/2 the planet or more! That means for that moment nobody else’s packets are getting through. Also, IANAL but legally I believe this would be considered an auxiliary station. At least in the US those are not allowed below the 2-meter band (maybe that’s not where you are though). I would use 2-meter APRS. Even there it’s not polite to send position reports on the main frequency too oft...

Full article: http://hackaday.com/2012/12/21/open-source-software-defin...

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