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DevOps-2-Adding-Wifi-to-Raspberry-Pi.md

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Adding Wifi to Raspberry Pi

The following article is used to explain how to setup Wifi for your Raspberry Pi.

Raspberry Pi plus Wifi

The USB Wifi Adapter device we will be using is: TP-Link 300Mbps High Gain Wireless USB Adapter (TL-WN822N).

Instructions

  1. Check to see what USB devices are connected to your Raspberry Pi.

    lsusb

  2. The output you would get would look something like this. From the list you should see seomthing like WLAN Adapter, this is good! This is our Wifi.

    Bus 001 Device 005: ID 06c2:003f Phidgets Inc. (formerly GLAB)
Bus 001 Device 004: ID 0bda:8178 Realtek Semiconductor Corp. RTL8192CU 802.11n WLAN Adapter
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter
Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp. SMC9514 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

  3. Next run the command to scan all the available wifi signals.

    sudo iwlist wlan0 scan

  4. Search through the list of sign until you find the one you are looking for and write down the details somewhere. Please look at the ESSID line to find the name of the WIFI endpoint you are using.

  5. Next, open wpa_supplicant.conf:

    sudo vi /etc/wpa_supplicant/wpa_supplicant.conf

  6. Append the file with the following contents - please change to suite your needs:

    network={
    ssid="SSID"
    psk="WIFI PASSWORD"
}

  7. Wireless connectivity should start immediately; if not, use

    sudo ifdown wlan0
sudo ifup wlan0

  8. Now disconnect the ethernet cable and restart the Raspberry Pi using the following command:

    sudo reboot

  9. (Optional) Now while you are running on your MacOS computer, run the following code which scan all the connect computers on the network. Once the command was run, look through and find the IP address of the Raspberry Pi.

    arp -a

  10. This may involve random guessing, but write the following command and change the IP address until you find the correct device.

    ssh -l pi 192.160.0.29

  11. If you finally find the correct one, congradulations! Your Raspberry Pi now has support for wifi.

Special Thanks:

Alternative Instructions

If the USB Wifi adapter option is too complicated, you have other options! If you purchase a Dlink DIR 505, you can set it as extending your network router and all you'll have to do is simple connect an ethernet cable from the Raspberry Pi to this device and you have Wifi!

Raspberry Pi plus Wifi