Posted by danny burstein on January 23, 2011, 11:48 pm
Just a touch off topic, but close enough to what people
here are doing that I'm hoping someone would have a pointer.
I'm looking for a simple thermometer widget that I could just
leave in the room that would record the temperature over a
period of a week or so.
A basic "push this button to see the time and temperature
for every 15 minutes" would be fine. Something with a USB
or other way of pulling over the data would be even better,
but I'd have to see the comparative costs.
(Are there any smartphones or similar tablets that have
temperature readings built in?)
Thanks for your suggestions.
Knowledge may be power, but communications is the key
[to foil spammers, my address has been double rot-13 encoded]
Posted by Morris Dovey on January 24, 2011, 12:46 am
On 1/23/2011 5:48 PM, danny burstein wrote:
You might find the Maxim device at
of some interest. Hobby boards sells the IC for US$.50 and kits that
allow you to roll your own (including a 1-wire to USB adapter).
(you may need to reconstruct the link in your browser)
The 1-wire architecture allows daisy-chaining sensors, so you could read
temperature, humidity, etc from several places at a single USB port.
No connection with either company - I'm just a happy customer.
This weekend I've been working with some software to "plot" data into a
graphic file which might provide a "gee-whiz" presentation method for
collected data - I'll upload some of the generated image files and post
links here when done.
PGP Key ID EBB1E70E
Posted by amdx on January 24, 2011, 12:34 pm
I have a One Wire system also. I have 13 temp. sensors, that feed into my
I use a program called Lampomitari, that is perfect for my situation. I
monitor 13 freezers,
with a quick glance I can see if any freezer has risen above a set
temperature, if one does the
display turns from white to red.
There are simpler programs than Lampomitari, but this has work very well for
at least two years.
Posted by daestrom on January 25, 2011, 12:46 am
On 1/23/2011 19:46 PM, Morris Dovey wrote:
I've used the one-wire devices as well with good success.
I didn't see your plot code but I found I could sample pretty much
continuously and use what's known as the 'Swinging Door Compression' so
that I didn't have to store all the data points.
Just sampled at around 0.2 Hz (once every 5 seconds) and kept the
'working' values in memory and wrote compressed data to disk with
time-stamps. This way I don't miss brief transients, but I can sample
run for months at a time without creating massive disk files of constant
data. (only the 'interesting' samples get written to disk).
Posted by Martin Riddle on January 24, 2011, 4:04 am
if you can Front $00 then the Omega OM-62 or the OM-63 ($5) does that.