user13709: I have about 10 Arduinos that have sensors attached, which report information back around my house. I would like to have a RPi 2, because they have nice screen and GUI options, to collect the information and display it accordingly.
I am looking for success stories on what wireless parts you used to get these two working. The the wireless must be able to penetrate a brick wall about 120ft away.
Thanks for replying, I edited the response above.

user4143: There's many options you could use.
The simplest, though most expensive, would be to equip all your Arduinos with WiFi shields and connect a USB WiFi dongle to the Pi.  The Pi could run in AP mode (investigate hostapd) so you don't have to connect them all to your internet router.
A cheaper option, though harder to work with on the Pi, would be to use the incredibly cheap but popular nRF24L01+ modules.  There are libraries aplenty for the Arduino, but I am not aware of code for the Pi (though there probably is somewhere if you google for it).
And then there are options in between which vary in price and complexity. 
Of course, you haven't mentioned range, only a brick wall.  The right choice could well be affected by the range of communication you need - do you go for the bare nRF28L01+ with a range of maybe 10m, or the one with the power amplifier and SMA antenna with a range of many hundreds of meters? Is WiFi going to be long enough range? Would a 433mHz module be a better choice?  All these questions and more need to be answered, and the best way is for you to describe your setup in detail, including what the longest range is you need to deal with, what amount of data you will be sending, do you need ultra low power to save batteries, etc.

user14501: I use the ESP8266 to get the data from my arduino to my webserver using wlan. You could easy install a webserver on your pi and connect it to your wifi, or just use a server online. 
So you can install on all places where you get WLAN. Also you could use a repeater if your wlan is not strong enough.
Thats how my projekt works (Water level messure)

Get range from ultrasonic sensor (every minute)
Send data to the ESP8266 using SoftwareSerial
Send getRequest with WLAN to my php page on the Server
Save Data to MySql Database
Show the Data Online with php and a javascript graph lib

My example is one way Arduino to Server, but you could easy communicate back to each of your arduinos.
good luck :)

13709: <p>I have about 10 Arduinos that have sensors attached, which report information back around my house. I would like to have a RPi 2, because they have nice screen and GUI options, to collect the information and display it accordingly.</p>

<p>I am looking for success stories on what wireless parts you used to get these two working. The the wireless must be able to penetrate a brick wall about 120ft away.</p>

<p>Thanks for replying, I edited the response above.</p>
 4143: <p>There's many options you could use.</p>

<p>The simplest, though most expensive, would be to equip all your Arduinos with WiFi shields and connect a USB WiFi dongle to the Pi.  The Pi could run in AP mode (investigate <a href="http://google.com/?q=hostapd+raspberry+pi" rel="nofollow">hostapd</a>) so you don't have to connect them all to your internet router.</p>

<p>A cheaper option, though harder to work with on the Pi, would be to use the incredibly cheap but popular <a href="http://google.com/?q=nrf24l01+" rel="nofollow">nRF24L01+</a> modules.  There are libraries aplenty for the Arduino, but I am not aware of code for the Pi (though there probably is somewhere if you google for it).</p>

<p>And then there are options in between which vary in price and complexity. </p>

<p>Of course, you haven't mentioned range, only a brick wall.  The right choice could well be affected by the range of communication you need - do you go for the bare nRF28L01+ with a range of maybe 10m, or the one with the power amplifier and SMA antenna with a range of many hundreds of meters? Is WiFi going to be long enough range? Would a 433mHz module be a better choice?  All these questions and more need to be answered, and the best way is for you to describe your setup in detail, including what the longest range is you need to deal with, what amount of data you will be sending, do you need ultra low power to save batteries, etc.</p>
 14501: <p>I use the ESP8266 to get the data from my arduino to my webserver using wlan. You could easy install a webserver on your pi and connect it to your wifi, or just use a server online. 
So you can install on all places where you get WLAN. Also you could use a repeater if your wlan is not strong enough.</p>

<p>Thats how my projekt works (Water level messure)</p>

<ol>
<li>Get range from ultrasonic sensor (every minute)</li>
<li>Send data to the ESP8266 using SoftwareSerial</li>
<li>Send getRequest with WLAN to my php page on the Server</li>
<li>Save Data to MySql Database</li>
<li>Show the Data Online with php and a javascript graph lib</li>
</ol>

<p>My example is one way Arduino to Server, but you could easy communicate back to each of your arduinos.</p>

<p>good luck :)</p>
