Temperature/humidity USB data loggers

[Jan Bakuwel]

Hi,

I'm looking for a USB temperature/humidity data logger (doesn't have to
be autonomous in fact is meant to be connected to the USB all the time)
that is compatible with Linux. I've come across the Extech RHT10
(Windows only software). Amazon offers the TEMPer USB Thermometer that
apparently is easy to interface. I'm looking for something that can do
humidity too.

Any ideas?

Jan


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[Vik Olliver]

Wire a humidity sensor to an Arduino?

Vik :v)

Post by Jan Bakuwel
Hi,
I'm looking for a USB temperature/humidity data logger (doesn't have to
be autonomous in fact is meant to be connected to the USB all the time)
that is compatible with Linux. I've come across the Extech RHT10
(Windows only software). Amazon offers the TEMPer USB Thermometer that
apparently is easy to interface. I'm looking for something that can do
humidity too.
Any ideas?
Jan
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[Jan Bakuwel]

Post by Vik Olliver
Wire a humidity sensor to an Arduino?

That'd be more work than I plan to put into it....

Jan


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[Ron Wilson]

This might be more than you require but I use these and they work well. Put
an ip into the device and it is then available anywhere on your network. It
has its own web page or you can use snmp to extract what you want
http://www.sensatronics.com/products-environmental-monitoring.html

Post by Jan Bakuwel
Hi,
I'm looking for a USB temperature/humidity data logger (doesn't have to
be autonomous in fact is meant to be connected to the USB all the time)
that is compatible with Linux. I've come across the Extech RHT10
(Windows only software). Amazon offers the TEMPer USB Thermometer that
apparently is easy to interface. I'm looking for something that can do
humidity too.
Any ideas?
Jan
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[Volker Kuhlmann]

Post by Ron Wilson
This might be more than you require but I use these and they work well. Put
an ip into the device and it is then available anywhere on your network. It
has its own web page or you can use snmp to extract what you want
http://www.sensatronics.com/products-environmental-monitoring.html

469 Americans plus swimming/flying cost. Ouch.

You can not beat this sensor for accuracy and ease-of-use:
http://nicegear.co.nz/sensors/sht15-temperature-humidity-sensor/

Add Arduino and Ethernet shield. Total under 200.

If you want a dust cap for the sensor go shopping at nz.element14.com.

I have this running as basis of a home automation system. Works well. It
outputs a bunch of sensor readings as CSV each time I care to http it.
cron takes care of it for me.

If you move it around take care to provide ESD protection. The sensor
will not like getting zapped.

Volker

[Robin Paulson]

Post by Jan Bakuwel
I'm looking for a USB temperature/humidity data logger (doesn't have to
be autonomous in fact is meant to be connected to the USB all the time)
that is compatible with Linux. I've come across the Extech RHT10
(Windows only software). Amazon offers the TEMPer USB Thermometer that
apparently is easy to interface. I'm looking for something that can do
humidity too.

we use Testo [1] temperature sensors at work (airconditioning), and the
engineers are impressed with them - they're pretty tough, and accurate
and precise (no parameters to that though). they are autonomous, and
might sit in a duct for days or weeks at a time. from what i recall,
they present a serial device to the computer, so should be ok with
linux. i'll plug one into an ubuntu machine this week if you would like
me to test one?

[1] testo.com

[Jan Bakuwel]

Hi Robin,

Post by Robin Paulson

Post by Jan Bakuwel
I'm looking for a USB temperature/humidity data logger (doesn't have to
be autonomous in fact is meant to be connected to the USB all the time)
that is compatible with Linux. I've come across the Extech RHT10
(Windows only software). Amazon offers the TEMPer USB Thermometer that
apparently is easy to interface. I'm looking for something that can do
humidity too.

we use Testo [1] temperature sensors at work (airconditioning), and
the engineers are impressed with them - they're pretty tough, and
accurate and precise (no parameters to that though). they are
autonomous, and might sit in a duct for days or weeks at a time. from
what i recall, they present a serial device to the computer, so should
be ok with linux. i'll plug one into an ubuntu machine this week if
you would like me to test one?
[1] testo.com

Thanks for the offer... but I found what I was looking for.

The TEMPerHUM costs less than NZ$30, plugs into a USB port. Reading it
from Linux is easy, see output from my (very simple) script below.

Date/time: 20110601-200002, Unix time: 1306915202, Temperature: 18.96,
Humidity: 61.19, Dewpoint: 11.32
Date/time: 20110601-200104, Unix time: 1306915264, Temperature: 19.01,
Humidity: 61.19, Dewpoint: 11.37
Date/time: 20110601-200205, Unix time: 1306915325, Temperature: 19.03,
Humidity: 61.08, Dewpoint: 11.36
Date/time: 20110601-200307, Unix time: 1306915387, Temperature: 19.05,
Humidity: 61.02, Dewpoint: 11.37
Date/time: 20110601-200408, Unix time: 1306915448, Temperature: 19.05,
Humidity: 60.99, Dewpoint: 11.36
Date/time: 20110601-200510, Unix time: 1306915510, Temperature: 19.04,
Humidity: 60.99, Dewpoint: 11.35
Date/time: 20110601-200612, Unix time: 1306915572, Temperature: 19.04,
Humidity: 60.96, Dewpoint: 11.34
Date/time: 20110601-200714, Unix time: 1306915634, Temperature: 19.04,
Humidity: 60.90, Dewpoint: 11.33
Date/time: 20110601-200815, Unix time: 1306915695, Temperature: 19.03,
Humidity: 60.90, Dewpoint: 11.32
Date/time: 20110601-200917, Unix time: 1306915757, Temperature: 19.03,
Humidity: 60.90, Dewpoint: 11.32
Date/time: 20110601-201019, Unix time: 1306915819, Temperature: 19.02,
Humidity: 60.86, Dewpoint: 11.30
Date/time: 20110601-201121, Unix time: 1306915881, Temperature: 19.00,
Humidity: 60.86, Dewpoint: 11.28

cheers,
Jan



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