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Title: How to transfer data (signed and unsigned Armory transactions) using audio? Post by: pf on October 10, 2015, 10:40:16 AM I wanted to transfer unsigned Armory transactions from online computer to offline computer, and signed Armory transactions from offline computer to online computer, using QR codes, webcam, and the software QtQR.
It didn't work. The webcam simply couldn't focus well enough. So this solution doesn't work. So my next question now is: How do I transfer them using audio (microphone and speakers)? Is there any ready-made software out there for Linux that makes this simple? Title: Re: How to transfer data (signed and unsigned Armory transactions) using audio? Post by: unamis76 on October 10, 2015, 10:06:23 PM Here's something (https://bitcointalk.org/index.php?topic=735111.0) to get you started on that. Haven't tested it myself yet, though :) There's also this (https://github.com/romanz/amodem), but I never managed to get it working.
Title: Re: How to transfer data (signed and unsigned Armory transactions) using audio? Post by: pf on October 11, 2015, 10:25:17 AM Here's something (https://bitcointalk.org/index.php?topic=735111.0) to get you started on that. Haven't tested it myself yet, though :) There's also this (https://github.com/romanz/amodem), but I never managed to get it working. I tried that audio stuff. Didn't work out for me. So I went back to QR codes. QtQR doesn't work because there's too much information in a QR code with a whole Armory transaction and the webcams couldn't focus well enough on it. Dividing the transaction data up manually to multiple QR code would have been very tedious. Instead, I found and used this software which automates the process: https://github.com/anderson-/Eye-Fi It actually worked! I'm going to write a tutorial on it soon. Title: Re: How to transfer data (signed and unsigned Armory transactions) using audio? Post by: unamis76 on October 11, 2015, 01:22:13 PM Here's something (https://bitcointalk.org/index.php?topic=735111.0) to get you started on that. Haven't tested it myself yet, though :) There's also this (https://github.com/romanz/amodem), but I never managed to get it working. I tried that audio stuff. Didn't work out for me. So I went back to QR codes. QtQR doesn't work because there's too much information in a QR code with a whole Armory transaction and the webcams couldn't focus well enough on it. Dividing the transaction data up manually to multiple QR code would have been very tedious. Instead, I found and used this software which automates the process: https://github.com/anderson-/Eye-Fi It actually worked! I'm going to write a tutorial on it soon. Neither of those systems worked for you? Newar said the audio system he recommended still works for him... I have exactly the same issue as you with webcam focusing and reception of the whole QR code. I'm not sure what webcam do you use, but I'm using an old PS2 Eye Toy webcan I had around. It's actually the only "webcam" I've ever had :D it only has 1mpx, I think, so I usually divide the transaction info over several QR codes... I guess I'll just have to get an official Raspberry Pi camera sooner or later, 5mpx will definitely improve things. The software you linked seems quite nice... Things to consider when I finally decide to improve my offline system. |