Dnia 24-01-2012 o 06:57:09 Mark Ter Morshuizen <m...@itbox.co.za> napisał(a):
> from > 4 sensors takes anything up to about 30 seconds using owread and > owserver on a You mean DS2482-800? I think it's too long. DS2482-800 has 8 separate outputs. It has to "switch" between outputs but while one output is used for data transfer other ones have power so the sensor can use parasite power. DS18b12 first gets a command to convert temperature which should take about 1s in this time all communication is stopped to supply power to the sensor after that the temperature should be available and master asks for it. > Is this normal? If so can anything be done to speed things up? The 1-wire > network is static (devices are seldom added or removed) so perhaps some You can try to write 1 to the /simultaneous/temperature and then read temperatures. In theory it should work but I don't know if it's implemented. The other solution is to read temp with less precision /sensor/temperature9 However on my 200Mhz router with DS2480B serial converter reading one parasite powered sensor take 1.22 seconds and it's with full precision. So maybe something else is wrong with your setup. Maybe the i2c<->usb converter add so much overhead? -- p4trykx ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
