http://wiki.nethome.nu/ 2012-05-20T15:51:59+02:00 http://wiki.nethome.nu/ http://wiki.nethome.nu/lib/tpl/monobook/images/favicon.ico text/html 2009-03-08T12:50:20+02:00 http://wiki.nethome.nu/doku.php/analyzer/background?rev=1236513020&do=diff [USB sound card] Background There are many types of simple household protocols that are interesting to decode. Typical examples are IR-signals used by remote controls and RF-signals used by remote switches. The problem is that you usually need special hardware to decode the signals. A normal PC has more than enough computing power to decode these types of protocols in the background, but the problem is to have an interface that can manage a real time data stream. text/html 2011-08-11T19:25:03+02:00 http://wiki.nethome.nu/doku.php/analyzer/download?rev=1313083503&do=diff [ Software] Since this software has not been formally tested or alpha-tested by many other users yet, there may still be some dark corners which does not work to 100% yet, but you are free to download it and try it out. Licence This program is free for private non commercial use. It is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. text/html 2009-03-08T12:05:00+02:00 http://wiki.nethome.nu/doku.php/analyzer/features?rev=1236510300&do=diff Features * Works on both Windows and Linux * Requires no specific hardware drivers * Very simple hardware required * Presents graphical view of sampled signals with digitized interpretation * Graphs may be zoomed and inspected in detail * Presents summary of pulse lengths with deviation and lengths * Easy to add and test protocol decoders * supports decoding of 12 protocols * Digital filter to remove interference * Can save samples for later analyze * Requires no installat… text/html 2009-03-08T11:44:33+02:00 http://wiki.nethome.nu/doku.php/analyzer/hardware?rev=1236509073&do=diff To be able to analyze an input signal, the signal has to be adapted to the microphone input levels. This means it has to be transformed to a low level AC-signal. Fortunately this is quite easy, once you have the signal, you only need two resistors to lower the signal level and a capacitor ro remove the DC-component. The typical circuit input circuit looks like this: text/html 2009-04-04T11:36:23+02:00 http://wiki.nethome.nu/doku.php/analyzer/protocols?rev=1238837783&do=diff These are the protocols for which there are decoders written. The decoders have been built with the help of this tool. * RC5 - IR-Protocol used by Philips and a lot other brands for remote controls * RC6 - Improved version of RC5 * HarmanKardon - IR-Protocol used by HarmanKardon for remote controls * Deltronic - RF-Protocol used by Deltronic (and others) for remote light switches * JVC - IR-Protocol used by JVC for remote controls * Nexa - RF-Protocol used by Nexa(and others) for re… text/html 2010-05-27T20:42:32+02:00 http://wiki.nethome.nu/doku.php/analyzer/release11?rev=1274985752&do=diff This is version 1.1 of the ProtocolAnalyzer. Main news in this release are: * Updated look with new icons * Support for MAC OS X! * Pulse distribution view, which displays the number of pulses as a function of pulse length in the raw pulse view * Export of raw pulse data * “Auto Flank Holdoff”, Flank Holdoff can be set to 1. * Pulse re-anayzing - a raw signal can be re-analyzed with new decoder settings * Pause/Resume scanning * Remove scanned samples * Indication of selected … text/html 2010-05-27T20:20:29+02:00 http://wiki.nethome.nu/doku.php/analyzer/release841?rev=1274984429&do=diff Pronto Support Received signals can now be presented in the Pronto-format. This is useful when scanning remotes for use with generic IR-senders. It can also be used with the new Pronto-support in the NetHomeServer. Three new configuration settings are added for the pronto support: text/html 2010-05-27T21:02:44+02:00 http://wiki.nethome.nu/doku.php/analyzer/screenshots?rev=1274986964&do=diff These are screen shots from the Protocol Analyzer-tool which is a tool designed for analyzing and decoding slow pulse based protocols. Main Window This is the main window with a JVC-protocol messages received, and the corresponding raw samples. [Analyzer main window] text/html 2010-05-27T22:38:11+02:00 http://wiki.nethome.nu/doku.php/analyzer/start?rev=1274992691&do=diff [Analyzer screen] The Protocol Analyzer is a small tool that can catch, analyze and decode “slow” pulse based protocols. Typical examples are IR-Remotes or RF-Remotes. It uses the microphone input to read the signals. Since this is almost always available with drivers across operating systems, this tool works without any specific drivers on Windows, Linux and OSX. text/html 2009-04-02T22:31:12+02:00 http://wiki.nethome.nu/doku.php/analyzer/theory?rev=1238704272&do=diff The ProtocolAnalyzer constantly samples the analog input signal, trying to recreate any digital pulses found in the signal. The so called flank detector uses a quite simple algorithm to find the flanks of the pulses: Find sequences where the sampled value changed significanlty (Flank Swing) over a short period of time (Flank Length) text/html 2009-03-08T12:14:31+02:00 http://wiki.nethome.nu/doku.php/analyzer/why?rev=1236510871&do=diff The reason I built this tool was that I wanted the NetHomeServer to be able to receive and react to RF and IR-remotes and also receive wireless thermometer values from UPM-units. To do this I needed to be able to receive and reverse engineer the protocols used.