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I don’t recommend this in any way, but cpuminer will run on the Raspberry Pi. It’s pretty easy to build:
sudo apt-get install build-essential libcurl4-openssl-dev automake git
git clone https://github.com/pooler/cpuminer.git
./configure CFLAGS="-march=armv6 -mtune=arm1176jzf-s -mfloat-abi=hard -mfpu=vfp -ffast-math -ffast-math -O3"
sudo make install
I’m not convinced that the l33t funroll-l00pz CFLAGS are strictly necessary. Yes, you still only get 0.34 khash/s on a stock Raspberry Pi â€” which means it would take several days to earn 1Ä (or roughly 0.1Â¢).
I’m trying to find the most futile computer on which to dig Ä. My BeagleBone Black is (somewhat surprisingly) more than 2Ã— as fast, once you replace the very limited Ã…ngstrÃ¶m distribution with Debian. I’m really disappointed that I can’t build cpuminer on my Intel Galileo. Its Yocto distribution is extremely small yet confusing. As the board runs burny hot under no load, I wonder how quickly it would glow white-hot under 100% CPU load.
I would like to describe a new and highly impractical method of transferring data between computers. Modern networks are getting more efficient every year. This protocol aims to reverse this trend, as RAFTP features:
- Slow file transfers
- A stubborn lack of error correction
- The ability to irritate neighbours while ensuring inaccurate transmission through playing the data over the air using Bell 202 tones.
minimodem --tx -v 0.90 -f doge-small-1200.wav 1200 < doge-small-tx.pgm
This file was then transferred to an audio player. To ensure maximal palaver, the audio player was connected to a computer via a USB audio interface and a long, minimally-shielded audio cable. The output was captured as mp3 by Audacity as this file: RAFTP-demo
The mp3 file was then decoded back to an image:
madplay -o wav:- RAFTP-demo.mp3Â Â | minimodem --rx -q -f - 1200 | rawtopgm 90 120 | pnmtopng > doge-small-rx.png
Figure 2 shows the received and decoded file: