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Raspberry Pi 2 Model B Basic Configuration Part 1 - Wifi, Static IP, DNS

The Raspberry Pi is a credit-card sized general purpose Linux computer designed and manufactured by the Raspberry Pi Foundation, a non-profit organization dedicated to making computers and programming instruction as accessible as possible to the widest number of people. Just recently I installed at home to play with it. There are already lots of resources available from Internet. This post and others are used to record all steps I did for making it useful to my daily work.




    Power Consumption

    Pi ModelPi StatePower Consumption
    4 BHDMI off, LEDs offTODO
    4 BHDMI off, LEDs off, onboard WiFiTODO
    3 B+HDMI off, LEDs off350 mA (1.7 W)
    3 B+HDMI off, LEDs off, onboard WiFi400 mA (2.0 W)
    3 BHDMI off, LEDs off230 mA (1.2 W)
    3 BHDMI off, LEDs off, onboard WiFi250 mA (1.2 W)
    2 BHDMI off, LEDs off200 mA (1.0 W)
    2 BHDMI off, LEDs off, USB WiFi240 mA (1.2 W)
    ZeroHDMI off, LED off80 mA (0.4 W)
    ZeroHDMI off, LED off, USB WiFi120 mA (0.7 W)
    B+HDMI off, LEDs off180 mA (0.9 W)
    B+HDMI off, LEDs off, USB WiFi220 mA (1.1 W)
    A+HDMI off, LEDs off80 mA (0.4 W)
    A+HDMI off, LEDs off, USB WiFi160 mA (0.8 W)

    Note: https://www.pidramble.com/wiki/benchmarks/power-consumption

    Install Raspberry Pi Software

    After you hooked up power cable, HDMI cable, mouse and keyboard, you will see the following screen:
    Choose Raspbian [RECOMMENDED] then click Install  on the right top corner. After around 25 minutes, OS will be installed successfully.



    Run Raspberry Pi Software Configuration Tool

    After you installed OS, the first time system will show you Raspberry Pi Software Configuration Tool to do some basic configuration such as change password, enable camera, etc.

    Also you can run the Raspberry Pi Software Configuration Tool whenever you want by running the following command after you logged into device:

    sudo raspi-config


    During installation, the screen will notify you, by default, the user name is pi and password is raspberry.

    Do not enable auto predicable for network interface name.
    You can disable "wait network interface up"

    Enable SSH

    From Raspberry Pi Software Configuration Tools Setup Option 8 Advanced Options:




    After enabled SSH, you should be able to use SecreCRT or Putty this kind of tool to access it remotely. 

    Enable Wireless

    My package has a usb wireless card. Followed instruction below, I was able to enable it.

    From SSH session, you can check your network configuration:

    Linux raspberrypi 3.18.7-v7+ #755 SMP PREEMPT Thu Feb 12 17:20:48 GMT 2015 armv7l

    The programs included with the Debian GNU/Linux system are free software;
    the exact distribution terms for each program are described in the
    individual files in /usr/share/doc/*/copyright.

    Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
    permitted by applicable law.
    Last login: Mon Oct  5 00:54:54 2015 from 192.168.2.216
    [email protected] ~ $ ifconfig



    or command 

    ip a

    To scan for WiFi networks, use the command

    [email protected] ~ $ sudo iwlist wlan0 scan
    wlan0     Scan completed :
              Cell 01 - Address: C4:09:38:70:BB:DE
                        ESSID:"Bobby"
                        Protocol:IEEE 802.11bgn
                        Mode:Master
                        Frequency:2.437 GHz (Channel 6)
                        Encryption key:on
                        Bit Rates:144 Mb/s
                        Extra:wpa_ie=dd1c0050f20101000050f20202000050f2040050f20201000050f2020c00
                        IE: WPA Version 1
                            Group Cipher : TKIP
                            Pairwise Ciphers (2) : CCMP TKIP
                            Authentication Suites (1) : PSK
                        Extra:rsn_ie=30180100000fac020200000fac04000fac020100000fac020c00
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : TKIP
                            Pairwise Ciphers (2) : CCMP TKIP
                            Authentication Suites (1) : PSK
                        Quality=100/100  Signal level=100/100
              Cell 02 - Address: 84:94:8C:91:1D:28
                        ESSID:"Rogers02520"
                        Protocol:IEEE 802.11bgn
                        Mode:Master
                        Frequency:2.422 GHz (Channel 3)
                        Encryption key:on
                        Bit Rates:300 Mb/s
                        Extra:wpa_ie=dd1a0050f20101000050f20202000050f2020050f20401000050f202
                        IE: WPA Version 1
                            Group Cipher : TKIP
                            Pairwise Ciphers (2) : TKIP CCMP
                            Authentication Suites (1) : PSK
                        Extra:rsn_ie=30180100000fac020200000fac02000fac040100000fac020000
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : TKIP
                            Pairwise Ciphers (2) : TKIP CCMP
                            Authentication Suites (1) : PSK
                        IE: Unknown: DD270050F204104A000110104400010210470010BC329E00F1DD7F11B2F8600F84948C91103C000101
                        Quality=0/100  Signal level=42/100
              Cell 03 - Address: 84:94:8C:C3:73:E8
                        ESSID:"SnowWhite"
                        Protocol:IEEE 802.11bgn
                        Mode:Master
                        Frequency:2.412 GHz (Channel 1)
                        Encryption key:on
                        Bit Rates:300 Mb/s
                        Extra:rsn_ie=30180100000fac020200000fac02000fac040100000fac020000
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : TKIP
                            Pairwise Ciphers (2) : TKIP CCMP
                            Authentication Suites (1) : PSK
                        IE: Unknown: DD270050F204104A000110104400010210470010BC329E00F1DD7F11B2F8600F84948CC3103C000101
                        Quality=81/100  Signal level=44/100  

    Adding your scanned wireless information to Raspberry Pi. You can use "sudo raspi-config" to do that as well. 

    Open the wpa-supplicant configuration file in nano:

    sudo nano /etc/wpa_supplicant/wpa_supplicant.conf

    Go to the bottom of the file and add the following:

    network={
        ssid="Bobby"
        psk="password12345"
    }

    In a couple of seconds, your Pi will join into SSID you entered and got the ip address



    [email protected] ~ $ ifconfig
    eth0      Link encap:Ethernet  HWaddr b8:27:eb:1c:f4:ae
              UP BROADCAST MULTICAST  MTU:1500  Metric:1
              RX packets:0 errors:0 dropped:0 overruns:0 frame:0
              TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:1000
              RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

    lo        Link encap:Local Loopback
              inet addr:127.0.0.1  Mask:255.0.0.0
              UP LOOPBACK RUNNING  MTU:65536  Metric:1
              RX packets:8 errors:0 dropped:0 overruns:0 frame:0
              TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:0
              RX bytes:1104 (1.0 KiB)  TX bytes:1104 (1.0 KiB)

    wlan0     Link encap:Ethernet  HWaddr 74:da:38:41:33:35
              inet addr:192.168.2.218  Bcast:192.168.2.255  Mask:255.255.255.0
              UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
              RX packets:3767 errors:0 dropped:10 overruns:0 frame:0
              TX packets:816 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:1000
              RX bytes:553750 (540.7 KiB)  TX bytes:222808 (217.5 KiB)


    Assign Static IP Address:


    [email protected] ~ $sudo nano /etc/network/interfaces


    auto lo

    iface lo inet loopback
    iface eth0 inet dhcp

    allow-hotplug wlan0
    iface wlan0 inet manual
    wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
    iface default inet static
    address 192.168.2.9
    netmask 255.255.255.0
    network 192.168.2.0
    broadcast 192.168.2.255
    gateway 192.168.2.1

    Assign Domain Name Servers:


    Temporary:
    sudo sh -c 'echo "nameserver 8.8.8.8" >> /etc/resolv.conf'


    Permanent: 


    # cat /etc/network/interfaces.d/50-cloud-init.cfg
    # This file is generated from information provided by
    # the datasource.  Changes to it will not persist across an instance.
    # To disable cloud-init's network configuration capabilities, write a file
    # /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
    # network: {config: disabled}
    auto lo
    iface lo inet loopback
    
    auto eth0
    iface eth0 inet dhcp
    
    allow-hotplug wlan0
    iface wlan0 inet manual
            wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
    iface default inet static
    address 192.168.2.9
    netmask 255.255.255.0
    network 192.168.2.0
    broadcast 192.168.2.255
    gateway 192.168.2.1
    dns-nameserver 8.8.8.8
    # static domain_name_servers=8.8.8.8 1.1.1.1
    
    



    $ sudo -i
    HypriotOS/armv7: [email protected] in ~
    # cat /etc/resolv.conf
    # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
    #     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
    nameserver 8.8.8.8
    HypriotOS/armv7: [email protected] in ~
    # ping www.google.ca
    PING www.google.ca (172.217.1.3) 56(84) bytes of data.
    64 bytes from yyz10s14-in-f3.1e100.net (172.217.1.3): icmp_seq=1 ttl=117 time=24.7 ms
    64 bytes from yyz10s14-in-f3.1e100.net (172.217.1.3): icmp_seq=2 ttl=117 time=23.0 ms
    ^C
    --- www.google.ca ping statistics ---
    2 packets transmitted, 2 received, 0% packet loss, time 3ms
    rtt min/avg/max/mdev = 23.014/23.865/24.716/0.851 ms
    HypriotOS/armv7: [email protected] in ~
    
    


    Google DNS: 8.8.4.4 8.8.8.8

    You can utilize the Cloudflare Public DNS by using the IP addresses 1.1.1.1 and 1.0.0.1

    The second popular alternative to the Google Public DNS is OpenDNS which is run by Cisco. It operates using the IP’s 208.67.222.222 and 208.67.220.220.



    Reference:







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