\nAs long as the RFID tag is near the reader, the music is played back. As soon as you remove the RFID tag however, the music stops. A very nice feature is that you can put a stack of tags near the reader, and they will act as a playlist. Remove the playing tag, and the program will play the next SID-File in the stack. Here<\/a> is a video of the SID player.\n<\/p>\n \nAt the Entropia meeting, Blueloop quickly put together a RFID detector using a LED, a piezo-speaker and a wire antenna. Here<\/a> are some<\/a> movies of the detector. You can hear the RFID reader reading the tag :).\n<\/p>\n I won’t post a lot of technical details in this post, as the application is best explained by reading the sourcecode \ud83d\ude42 Believe me, it is very clear and straightforward. I’d like to point out the libusb, which allows you to do crossplatform, userland USB development without much hassle. I used the libusb USB communication code for a few devices, including crypto-communication hardware, a USB analyzer and mobile phones, and it is very nice to have the same code work on most current unix platforms. Check it out at libusb<\/a>. In order to have a few lines of code in this post though, here is the ruby program dividuum used to test writing to RFID tags:\n<\/p>\n Dividuum, my flat-mate, has built a very cool RFID application. He stores SID-files (SID is the music format for the C64) on RFID tags. When you put such a tag near to the reader, the music is played on the … Continue reading ![\"Alt](\"\/netzstaub\/images\/rfid-detector.jpg\")
<\/div>\n#!\/usr\/bin\/env ruby\nrequire 'rfid'\n\ntext = ARGV.join(' ') + \"\\x00\"\ntext += \"\\x00\" * (4 - text.size % 4)\n\nRFID::Device.new(0) do |rfid|\n loop do \n rfid.readSerials.each do |label|\n if rfid.write(label.snr, text) \n puts \"Wrote to #{label.snrHex}\"\n end\n end\n end\nend\n<\/pre>\n#!\/usr\/bin\/env ruby\nrequire 'rfid'\n\nRFID::Device.new(0) do |rfid|\n loop do \n rfid.readSerials.each do |label|\n data, blocksRead, blockSize = rfid.read(label.snr, 0, 10)\n puts \"Read from #{label.snrHex}: #{data}\" if data\n end\n end\nend\n<\/pre>\n","protected":false},"excerpt":{"rendered":"