I have project and use 10 DS18B20 sensors to connected on one cable (parasite power mode). Longest distance of 16-18 meters (2 pieces), 10-12 meters (5 units), the other 3-4 meters. Runs great. The project is here: http://www.saulevire.lt/en (and here- http://www.ksduino.org/?devices&device_id=3331) (works half the year, but the site still has not been made).

Fantastic job! Congratulations!

One proposal, and it will be a perfect system. DS18B20 sensors can be connected on a single cable. It is more convenient.
 But then you need to know their address. Here is a sample of how addresses are assigned sensors: http://www.homebrewtalk.com/f51/arduino-networked-temperature-monitor-340294/index2.html#post4286666
 The combination of both programs get a great system.

My English is very bad, but I hope you got the idea...

I would like to do the following:
http://me _arduino
You connect the new sensor with the address 0x00, 0x11, 0x22
Please assign a sensor name ...|_Room_| and press ENTER

I do not know what will be the address of the connected sensor

Maybe someone have something like the example:
   output temperature sensor DS18B20 address and assign it a name, on the arduino web server for example- room temperature, outdoor temperature ...
I want to all the sensors are connected to a single cable and make configuration through web server. I use enc28j60 controller.

First error in 142 lines:

 """"  Tw = EEPROM.readFloat(address);"""""

thermostat_marque_android.ino: In function 'void setup()':
thermostat_marque_android:142: error: 'EEPROM' was not declared in this scope
thermostat_marque_android.ino: In function 'void loop()':
thermostat_marque_android:281: error: 'EEPROM' was not declared in this scope
thermostat_marque_android.ino: In function 'void action(int, EthernetClient)':
thermostat_marque_android:423: error: 'EEPROM' was not declared in this scope
thermostat_marque_android:460: error: 'EEPROM' was not declared in this scope

thx Marque in advance.
br ale

same error with Arduino IDE 5.1
with the Arduino IDE 1.0.1 - no errors

what's that I juste done a quick google's search, but nothing interrested....

can you explain what's that?

I mean this library:
http://milesburton.com/Dallas_Temperature_Control_Library
https://github.com/milesburton/Arduino-Temperature-Control-Library

Dallas's librairy?

Yes,  why don't use Dallas's library?

why dont use DallasTemperatureControl library?

My English is very bad, too :-)
have to say what you wish to do so, must complete the task conditions, it is difficult to advise otherwise.

The full terms of reference in the scene!
Otherwise, there is nothing you will not respond.

You really need a more powerful Arduino with more RAM (mega2560) or can try http://ksduino.org, http://open.sen.se/, https://www.thingspeak.com/ http://exosite.com/products/portals cloud. Ksduino and http://www.pushingbox.com/ support ENC28J60.

I think that e-mail can send only arduino mega 2560, arduino uno insufficient memory, if you want to supplement the program

http://www.lucadentella.it/en/2012/12/16/enc28j60-e-arduino-12/, https://raw.github.com/lucadentella/enc28j60_tutorial/master/_12_SkebbySMS/_12_SkebbySMS.ino
https://github.com/jcw/ethercard/issues/65
http://forum.jeelabs.net/comment/9920#comment-9920

Please read there:
http://www.homebrewtalk.com/f51/arduino-networked-temperature-monitor-340294/index2.html#post4286666

why dont use DS18B20 temperature sensor? They do not need any calibration, just a few single-conductor sensors.

Interesting project, can you share the sketch? I do think solar controller and data collector to write to the web server.