Morse code is a simple form of modulation If you are from my generation or above, do you remember the sound of the early Internet connecting to the AOL servers, emitting a screeching sound from what seemed to be another world? That was your 56k modem So I had to take a step back get to the basics: Instead of directly transmitting over the electromagnetic medium, I started exploring the transmission of data by sound. Well, it turns out it is indeed pretty hard if you don’t have a background in signal processing and are just a curious geek such as me 😅. I also recently bought a HackRF One, so in order to make good use of it, I had the ambition to learn some GNU Radio and create my own radio protocol… With all of this free software ecosystem decoding and encoding radio waves, how hard could-it be?
Morse decoder audio online how to#
We learned how to use it to listen to the commercial radio, intercept airplane and pager messages (yes, they are still used nowadays by some professions) and to transmit radio signals using a Raspberry Pi. Hello there! It has been a while since my last post If you have been following me lately, you know that in my last stories, I explored a bit what you could do with a very simple Software-Defined Radio (SDR) dongle like the ones based on the RTL2838 chipset that are sold for about 25$ at your favorite online store. Back to basics: Decoding Audio Modems with Audacity
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