Tag Archives: WiFi

Sharing WiFi Internet connection with Raspberry Pi through LAN/Ethernet (Headless Mode)

After having setup the Raspberry Pi to work in headless mode directly without installing anything on it as described in this post, we then tinkered on to share WiFi internet connection with the Raspberry Pi through the LAN/Ethernet connection which we established in our earlier post.

 

What you want to do:

  1. Share PC/Laptop’s WiFi internet connection with Raspberry Pi through LAN/Ethernet connected to Raspberry Pi

What you have:

  1. Raspberry Pi running the latest Raspbian Wheezy
  2. PC/Laptop with WiFi Internet connection and a Ethernet Jack (LAN Connector / RJ45)
  3. A working SSH connection with Raspberry Pi (direct access, explained here)

What you don’t have:

  1. Display Device for the Raspberry Pi (HDMI enabled display unit / Old TV)
  2. Direct Internet connection for the Raspberry Pi (LAN or WiFi)

Extra Stuff you need:

  1. Standard Network Cable (Cat 5, Standard or Crossover)
  2. PutTTY Software (will be used to SSH into the Pi)
  3. SD Card Writer

Edit: 2nd Jan, 2015. Video Tutorial Added:

 

 

A large part of this post assumes you’ve read the earlier post on directly accessing the shell on Raspberry Pi through a Ethernet/LAN connection. In this post, we’ll go about setting up the Raspberry Pi to access internet through the Ras-Pi’s Ethernet/LAN port from a Laptop/PC’s shared WiFi connection.

Steps:

 

  1. Firstly, enable the WiFi adapter of the PC/Laptop and make sure it’s connected to a WiFi hotpspot. Open any Internet Browser and confirm internet access by opening any website.

raspi

Note: I’m using my Android device (Nexus One) configured as a WiFi hotspot J

  1. Now, go to Network and Sharing Center (Network Settings in Win XP) and then head to the Change Adapter Settings page. As shown below, we’re connected to ‘Wireless Network Connection’ on ‘Android 4’. Do remember the ‘Local Area Connection’ to which we’ll eventually share this connection

raspi

  1. Now, right click the above Network → Properties and then select the Sharing tab

raspi

  1. From the drop down list, choose ‘Local Area Connection’ and enable both the checkboxes and hit OK. Once done, head back to the Adapter Settings page and you should now see the Shared info message on the Wireless Network Connection

raspi

raspi

  1. Now, right click ‘Local Area Connection’ → Properties and then select Internet Protocol Version 4 and then click the Properties Button

raspi

Once the properties tab pops up, make sure that the ‘Obtain IP address automatically’ checkbox is selected. If not, check it and hit OK

raspi

  1. Now, power up the Raspberry Pi (making sure that the Ras-Pi and the Laptop/PC are connected to each other through the LAN/Ethernet cable) and wait a minute or two while the Ras-Pi boots. Now, repeat step 5 (previous one) to make sure ‘Obtain IP Address Automatically’ is still checked.
  2. Open up command prompt using the hotkey Windows Key + R and then typing in cmd or simply keying in cmd in the start menu (Win 7)
  3. In the command prompt, key in ipconfig and scroll to the top of the info shown

raspi

Note the IPv4 address which is 169.254.39.68 in this example. Please make a note of what you see as this will be required further.

  1. Now, power off the Raspberry Pi and plug the Ras-Pi’s SD card into a card reader and connect it to the PC. Once the disk opens up, open the cmdline.txt file in any editor

raspi

raspi

You’d probably have an entry as ip=169.254.39.71 which we set up in our previous post

  1. Now, to this entry, append the IPv4 which we got earlier preceded by two colons as shown below:

raspi

where the first half is the static IP for Raspberry Pi (169.254.39.71) and the other half is the IP of the IPV4 or Ethernet Adapter (169.254.39.68) which we obtained earlier.

  1. Save this file and plug the SD card back into the Raspberry Pi. Power up the Raspberry Pi and wait for a min or two. Establishg a direct SSH connection with the Raspberry Pi as explained in the previous post.
  2. Now, to verify if our Ras-Pi is Internet-Connected, type in this command in the Shell (PuTTY terminal connected to the Ras-Pi)

ping www.google.com

and you should see response from the servers as shown below:

raspi

Voila!!! Your Raspberry Pi is now connected to the World Wide Web 🙂

  1. Going one step further, lets direct access the Raspberry Pi’s desktop and open up the midori browser. Verify Internet connectivity on the Ras-Pi by opening any website

raspi

Please let me your feedback or questions through comments.

Thanks 🙂

References:

  1. http://pihw.wordpress.com/guides/direct-network-connection/super-easy-direct-network-connection/
  2. http://anwaarullah.wordpress.com/2013/07/16/direct-access-raspberry-pi-shell-and-desktop/

Making Android talk with Arduino through WiFi

After spending days and more than 11 hours straight today, we’ve finally got Android talking with Arduino via WiFi using the cute little RN XV WiFi module. What was considered to be a mountain turned out to be a molehill. The funny part is that this now looks more easier than the Bluetooth communication which I’m comfortable with. What we’re doing here is connecting the Arduino to an Android device which is configured as a HotSpot (a very cool Android feature from ver 2.2 onwards). Snapshot:

image
Android Arduino WiFi

I’ll be explaining in detail all steps, configurations and code in my next post since I’m very tired now having worked the entire day getting this working. It’s 2:30 A.M 🙂 Good Night