Temp Probes & Linux

g1000user · Post by **g1000user** » Thu Apr 07, 2005 11:17 pm

Is there a driver to get the temp probes to be recognized in Linux? I have a VK204-24-USB, and got it working in linux, except I can't figure out how to get the temp probes working.

Miles · Post by **Miles** » Fri Apr 08, 2005 7:39 am

Hello g1000user,

Thank you for your post. Drivers are not required for the temperature probes to be recognized. The temperature probes use a one wire protocol. This protocol is explained is extensively in Section 6 of the manual: http://www.matrixorbital.com/files/VK202-24-USB.pdf

If you have any further questions, feel free to post.

Paradigm · Post by **Paradigm** » Fri Apr 08, 2005 11:45 am

Another post that will be of use for you is my 1-wire tutorial

http://www.lcdforums.com/forums/viewtop ... highlight=

g1000user · Post by **g1000user** » Sat Apr 09, 2005 9:24 pm

I think the real question I'm asking, is what 1 wire driver in linux would I use to access the bus?

Paradigm · Post by **Paradigm** » Mon Apr 11, 2005 10:11 am

None. You access the display through serial and use the displays 1-wire driver. For example to get all temp probes to get a reaeding ready, you transmit:

FE C8 01 01 10 00 CC 44 (explained in the 1-wire tutorial)

VIA the serial port to the display. Then the display will take care of the 1-wire bus transaction, and report back the response to you. Linux requires no knowledge of the 1-wire bus, since all information is transmitted through the display via the serial port. So if you can talk to the display thorugh the serial port, you have everything you need to start using the 1-wire bus.