Webserver and Temperature Sensor

[Bodensee77]

Hi guys,

I have a WL 550gP Router. What I want to do: Install a temperature sensor at home and call up the temperature value via internet. I don't want to have any computer running all time due to energy costs.

Thank you for your help!
Bodensee77

[raas]

Hi,

For this you need some analog or digital I/O to the router.
A product which can do this is the velleman K8055 usb interface board: http://www.velleman.be/ot/en/product/view/?id=351346

This board has 2 analog and 5 digital inputs (it also has 8 digital outputs, but you don't need them for this)

As temperature sensor you could look at Maxim's DS600: http://datasheets.maxim-ic.com/en/ds/DS600.pdf this one can be used with the velleman board.

For letting linux interface with the velleman board, have a look at the following 'library' : http://libk8055.sourceforge.net/


Furthermore, this thread is about adding analog/digital I/O to the asus: http://www.wl500g.info/showthread.php?t=1598

What you do is, connect the velleman board to the asus.. use the libk8055 to read out its values and use these to get the desired values you want.. (ie. convert analog input tot degrees Celcius or Fahrenheit)



Hope this helps.
(I'm using all of the above for my domotica project, monitoring gas and electricity usage in conjunction with outside and inside temperatures, all data is logged into mysql database and graphics/info is created.)

logging of electricity usage last-30-minutes:


Or the cost of electricity per day (hi and lo tarifs)



Not exactly what you want to do, but with the same stuff you'll get an-internet-enabled-temperature-meter.

Hope this helps

[darius]

What about very basic solution like
temperature LCD display image recognition from cheap weather station using web cam and remote temperature sensor ?

web cam is really a good interface if only data is visualized on LCD display.
Image recognition, motion detection with wii cam worked fine for me.

Darius

[raas]

Hi,

I don't know which is cheaper, the solution I pointed out will set you back 30-40 euro's and some of your time.

[darius]

Hi,

I don't know which is cheaper, the solution I pointed out will set you back 30-40 euro's and some of your time.

Ok.
How much time
and how can I monitor gas, electricity, water usage with this board ?
Please write more about your domotica project.

Personally I would prefer bluetooth-based remote sensors as an option.

Darius

[raas]

Darius,

How much time? I don't know once I've written it all up. research takes some time.
How to monitor gas & electricity? Have a look at my first post in this thread, the grey cursive part which tells how to do it http://www.wl500g.info/showthread.php?t=16815

I haven't thought about water usage yet, mainly because it's dirt cheap,

Wait for the how to, it's my intention to share the thing on the forum, but I haven't had the time to fine tune the gas-detection yet.
Electricity is fine and works 100% and is pretty easy to detect (if you have an electricity meter like described in the post)

just put a 1k resistor in series with an LDR and lead it to the velleman input 1 or 2 (hw counters, 16 bit)

5v-------LDR---|---1Kresistor-----GND

now at the point where the pipeline is, this is your velleman sensor input. connect the ground of the vellemand to ground of schematic above and use the pipeline to input 1 or 2, for counter, 3-5 for detection of Hi or Lo tarif.

write script to log. voila.