On Thu, Jul 29, 2010 at 04:47:40PM -0400, Thom Paine wrote:
> Now that I am getting my MH box online and working somewhat well, and making
> progress, I'm looking at expanding my system.
> While I realize it's the coke or pepsi debate, I'm looking at getting
> weather monitoring hardware added.
> I would like to monitor tempurature and humidity in all of the rooms of my
> house. What is the best (best=nice mix between affordable and reliable)
> hardware for that? Should I go with a bunch of iButtons? Do other people on
> the list monitor temps in each room, or just a few key rooms? What other
> cool things should / could I add to my system? I would like to use something
> that is popular with other list members so that I don't get some unknown
> piece of hardware and have a hard time getting it working.
> As for external weather monitoring, I am thinking of something that will do
> sunlight, temperature, humidity, wind speed, wind direction, rainfall
> (snowfall?), pressure.
> Is there something popular that will fit this bill?
Ok, if you want all this, you should go with an rfxcom 433Mhz and oregon
scientific weather sensors.
You can get temp/humidity/baro in each room wireless for $30 or so (1-wire
temp/humidity is closer to $60 and you need to cable it).
Outdoors 1-wire stuff exists, but I found it pretty expensive, so while it costs more
when you start, going wireless ends up being cheaper in my experience.
This explains the rfxcom 433Mhz stuff (it'll cost you around $150 for the receiver):
For outside weather, the WMR968 is actually not so bad ($150 to $200) and
will get you 4 sensors but 7 readings:
- outside wind speed/dir
- outside temp/humidity
- inside temp/humidity/baro (that's a BTHR968)
Then, just buy more BTHR968 for your other rooms:
The only trick is that the WMR968 console (which you could use to receive
the signals on your PC instead of a separate rfxcom 433Mhz if you want to
save a bit), will only receive one BTHR968. So, you must have an rfxcom if
you want multiple BTHR968's.
We're left fwith sun, I got the 1-wire UV sensor from
If you only care about sun, and not UV, you can buy this combined sensor instead:
(I just didn't need that one since I already have outside humidity/temp).
I haven't graphed my oregon stuff (I should do this within a few days), but
you can see my 1-wire and UV stuff:
In the end, both 1-wire and oregon scientific will fit the bill, but 1-wire
costs a bit more somehow, needs wiring, if you get lightening, you're
risking everything your 1-wire is attached to.
Oh, 1-wire is however definitely cheaper if you only need temperature since sensors
only cost a few dollars each. It's just a shame that the price jumps to $60-ish
as soon as you want to add humidity.
Good luck :)
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems & security ....
.... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/