usb temperature logger


11 posts
by rooster » Fri Nov 02, 2012 2:06 pm
Hi

Anyone found a USB temperature logger that works with the RPi? I found an old one that used to work poorly on Windows (Temper?) but doesn't work on the Pi or ubuntu laptop

Thanks!
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by nr. » Fri Nov 02, 2012 2:47 pm
The DS9490R USB bridge, with some DS18B20 sensors works nicely. You can use the digitemp package (which I think is in the standard Raspbian distro) to read the sensors and write to a logfile. I had this setup working for some time, before 1-wire support was built into the kernel, and now I just connect the DS18B20s straight to the GPIO pins.
--
nr.
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by dbodnar » Sat Nov 03, 2012 11:53 am
Hi, Rooster - I have been using the Pi and the DS18B20 to measure and plot temperature in my home and my garden pond. I have also been experimenting with the HDT22 temperature / humidity sensor. My notes are NOT complete but you may want to look them over here:

http://www.trainelectronics.com/RaspberryPi/Graph_Temperature/index.html

The graphs are here:

http://www.trainelectronics.com/RaspberryPi/Graph_Temperature/Graph.htm

the first two graphs are of my home - the plots are temperatures in the garage, basement, 1st and 2nd floor as well as the temperatures of the pipes going into and out of my hot water heating system and hot water heater. The second pair of graphs are of the ambient temperature in the back yard and the temperature at three points in my garden pond.

The last graph is a test of the temperature / humidity sensor.

Please let me know if you have any questions.

dave
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Location: Pittsburgh, PA
by anthonyUK » Mon Nov 05, 2012 10:23 am
I'm using a temper2 dual sensor on an RPi.
Try the drivers from here - http://www.isp-sl.com/pcsensor-1.0.1.tgz
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by PhJulien » Mon Nov 05, 2012 12:32 pm
Hi,

I recently received my USB temperature sensor from Yoctopuce and it works nicely (link). If you want to log the temperature you will need to write a bit of code but the devices come with a library for most programming languages (see list).

I worked on it this week end and could quickly program an interface in Python displaying the current temperature. In other words, I recommend this product.

It will be a bit more expensive than a simple non-USB temperature sensor but you also pay for the convenience and the development of the libraries.

For your information, before ordering from Yoctopuce I seriously considered buying from Phidgets (link).
Not a native speaker. Sorry for my english. =)
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Location: Lausanne, Switzerland
by onsolution » Tue Nov 06, 2012 10:06 am
I sell temperature loggers and temperature logging solutions.

If any of you want to take one of these apps and tidy it up for a commercially ready product then please talk to me. Or if you want to give it a shot anyway.

The requirements would be along the lines of:
- programmable sample rates
- programmable high and low alarm limits
- some sort of configurable alarm action (e.g. email)
- ability to get the results directly from it as a graph and table using a web browser
- ability to get the results as a csv (and optionally xml)
- ideally the ability to upload results to a centralised database for a multiunit system
- choice of temperature sensor is up to you. Spec has to be better than 1°C accuracy.

And finally, if you are really up to the challenge:
- battery backup
- multiple channel/devices

Please email shane at onsolution.com.au
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by rooster » Tue Nov 06, 2012 1:50 pm
dbodnar wrote:Hi, Rooster - I have been using the Pi and the DS18B20 to measure and plot temperature in my home and my garden pond. I have also been experimenting with the HDT22 temperature / humidity sensor. My notes are NOT complete but you may want to look them over here:

http://www.trainelectronics.com/RaspberryPi/Graph_Temperature/index.html

The graphs are here:

http://www.trainelectronics.com/RaspberryPi/Graph_Temperature/Graph.htm

the first two graphs are of my home - the plots are temperatures in the garage, basement, 1st and 2nd floor as well as the temperatures of the pipes going into and out of my hot water heating system and hot water heater. The second pair of graphs are of the ambient temperature in the back yard and the temperature at three points in my garden pond.

The last graph is a test of the temperature / humidity sensor.

Please let me know if you have any questions.

dave


Great, thanks, seems like a great solution! Waiting for my DS18B20s to arrive, then may be back for questons!

R
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Joined: Thu Aug 02, 2012 8:09 pm
by kru64 » Mon Nov 12, 2012 6:22 pm
dbodnar, you install 4.7 kom resistor on every sensor. But only one is needed. And also exists another solution, where only one wire is used.
See
http://chipenable.ru/index.php/programm ... ast-1.html
use Google translator or just see at schematics
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by dbodnar » Mon Nov 12, 2012 6:35 pm
You are correct about only one resistor being needed - I am in experimentation mode and move sensors around and find it just as easy to pull each sensor up so that I don't forget to add the resistor.

thanks!

dave
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Location: Pittsburgh, PA
by thogue » Tue Nov 13, 2012 1:21 am
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by rooster » Tue Nov 13, 2012 12:28 pm
dbodnar wrote:Hi, Rooster - I have been using the Pi and the DS18B20 to measure and plot temperature in my home and my garden pond. I have also been experimenting with the HDT22 temperature / humidity sensor. My notes are NOT complete but you may want to look them over here:

http://www.trainelectronics.com/RaspberryPi/Graph_Temperature/index.html

The graphs are here:

http://www.trainelectronics.com/RaspberryPi/Graph_Temperature/Graph.htm

the first two graphs are of my home - the plots are temperatures in the garage, basement, 1st and 2nd floor as well as the temperatures of the pipes going into and out of my hot water heating system and hot water heater. The second pair of graphs are of the ambient temperature in the back yard and the temperature at three points in my garden pond.

The last graph is a test of the temperature / humidity sensor.

Please let me know if you have any questions.

dave


Hi dave

That worked a treat when my sensors arrived, thanks!

R
Posts: 100
Joined: Thu Aug 02, 2012 8:09 pm