Difference between revisions of "Exploring The Raspberry Pi (USIU)"

Latest revision as of 20:55, 28 July 2015

You will need a 4GB or larger card. You will need a 4GB or larger card. NOOBS holds the various distros and support files for the “recovery” process. Basically, the installer lives on the card
Go to the SD Association’s website and download SD Formatter 4.0 for Windows
(https://www.sdcard.org/downloads/formatter_4/)
Follow the instructions to install the software.
Insert your SD card into the computer or SD card reader and make a note of the drive letter allocated to it.
In SD Formatter software, select the drive letter for your SD card and format it.

Copy and Paste the NOOBS files

Once your SD card has been formatted, copy all the files in the extracted NOOBS folder and paste them onto the SD card drive.
When this process has finished, safely remove the SD card and insert it into your Raspberry Pi.

Format the SD card on the Linux Platform

On linux the following assumes you have root/administrator privileges

First we need to download the ISO from the downloads page
(https://www.raspberrypi.org/downloads/)
Select an OS either Raspbian, UBUNTU mate or Snappy UBUNTU core
Find the device, assuming your system is different to mine. The easiest way is to run the following:

#fdisk -l

(This command lists all the mounted and unmounted devices on your computer.)

Once you have identified your device and the partition enter the following command that will format the SDcard

#dd if=/downloads/raspbian.img of/=sdb bs=512 conv=noerror,sync

When this process has finished, safely remove the SD card and insert it into your Raspberry Pi and boot it.

Installing OS

Noobs installer First boot

Plug in your keyboard, mouse and monitor cables.
Now plug in the USB power cable to your Pi.
Your Raspberry Pi will boot, and a window will appear with a list of different operating systems that you can install. We recommend that you use Raspbian – tick the box next to Raspbian and click on Install.

http://raspberry.kenet.or.ke/images/0/05/Noobsinstall2.png

Raspbian will then run through its installation process. Note this can take a while.
When the install process has completed, the Raspberry Pi configuration menu (raspi-config) will load. Here you are able to set the time and date for your region and enable a Raspberry Pi camera board, or even create users. You can exit this menu by using Tab on your keyboard to move to Finish.

Logging in with Default username and password

The OS will boot to command line where you will need to enter the default username and password

The default login for Raspbian OS
Username: pi with the
Password: raspberry

Loading the graphical user interface

To load the graphical user interface type
#startx

Pre-Lab Exercise 2:Connecting Pi to the Internet

WiFi Configuration

After loading the graphical user interface
Select the start menu then select preferences then select WiFi configuration

Step 1. Selecting the WiFi configurator

Step 2.Selecting the network

Click on the Scan button and a second window will open. Find your Wireless access point in the list and double click on it. This will open another window.

Step 3.Joining the network

Double-click on the SSID of the access point to connect to, and then type in access password (if required)

Using the command line

Step 1 Getting WiFi network details

check the label on your wifi card using the command

#iwconfig

To scan for WiFi networks, use the command

#sudo iwlist wlan0 scan

This will list all available WiFi networks

Step 2 Adding the network details to the Raspberry Pi

Open the wpa-supplicant configuration file in nano text editor, use the following command

#sudo nano /etc/wpa_supplicant/wpa_supplicant.conf

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

network={

ssid="The_ESSID "

psk="Your_wifi_password"

}

In the case of the example network, we would enter:

network={

ssid="CEH"

psk="testingPassword"

}

Now save the file by pressing ctrl+x then y, then finally press enter.

At this point, wpa-supplicant will normally notice a change has occurred within a few seconds, and it will try and connect to the network. If it does not, either manually restart the interface with the commands

#sudo ifdown wlan0
#sudo ifup wlan0,

or reboot your Raspberry Pi with
#sudo reboot.

verify if it has successfully connected using the command
#ifconfig wlan0
(If not, check your password and ESSID are correct. )

LAN Configuration

DHCP Configuration

The Raspbian network configuration file is located at /etc/network/interfaces.

Step 1 Open the network configuration file with the following command
#sudo nano /etc/network/interfaces

A default configuration looks like the following, where DHCP is used for wired Ethernet.

Static configuration

Step 2 restart the network services to activate the change without reboot

#sudo service networking restart

Step 3 check whether an IP address is set or not, type the ifconfig command.

#ifconfig

Pre-Lab Exercise 3: Setting up SSH (Secure Shell) to remote into the PI.

Step 1 Enter the raspberry config by entering the following command

# sudo raspi-config

Step 2 then navigate toadvance options, then ssh, hit Enter and select Enable or disable ssh server.
check the status of your interface use
#ifconfig -a
Step 3 ssh into pi from another machine using the command
#ssh pi@’ip-address’

Pre-Lab Exercise 4: Installing Applications on PI

Now that we are connected to the internet

Step 1 To begin installing software first update your system by entering the following command
#Sudo apt-get update && upgrade
Step 2 Installing python package manager by entering the following command
#Sudo apt-get install python-pip
(pip is a package management system used to install and manage software packages written in Python)
Step 3 Installation RPi.GPIO by entering the following command
#Sudo pip install rpi.gpio
(this allows you to access the raspberry pi general IO pins using the a numbering system BCM or BOARD)

GPIO layout

Thus at the top of every python script, after importing the RPi.GPIO module, we set our GPIO numbering mode.

As shown in the diagram below

@@ Line 17: / Line 17: @@
 #Click on the <code>download ZIP</code> button under ‘NOOBS (offline and network install)’, and select a folder to save it to.
 #Extract the files from the zip.
+<div>Preparing SD card on Linux/Windows Platforms<br/></div><ol style="list-style-type:upper-alpha;">
-====== Preparing SD card on Linux/Windows Platforms ======
-<ol style="list-style-type:upper-alpha;">
 <li>'''Preparing SD card on Linux/Windows Platforms'''</li>
 </ol>
@@ Line 55: / Line 53: @@
 #When this process has finished, safely remove the SD card and insert it into your Raspberry Pi and boot it.
+<div>Installing OS<br/></div>
-====== Installing OS ======
 '''Noobs installer First boot'''
@@ Line 77: / Line 73: @@
 '''<u>Loading the graphical user interface</u>'''
-To load the graphical user interface type<br/>'''''#'''''<code>'''''startx'''''</code>
+To load the graphical user interface type<br/><span style="font-family:courier new,courier,monospace">'''''#'''''<code>'''''startx'''''</code></span>
 ====== Pre-Lab Exercise 2:Connecting Pi to the Internet ======
 #WiFi Configuration
-#Using the command line
-##LAN Configuration
-###DHCP Configuration
-###Static configuration
-====== Pre-Lab Exercise 3:&nbsp; Setting up SSH (Secure Shell) to remote into the PI ======
+*After loading the graphical user interface
+*Select the start menu then select preferences then select WiFi configuration<br/>[[File:WIFI1.png|RTENOTITLE]]
+*
+'''Step 1. Selecting the WiFi configurator<br/>[[File:WIFI2.png|RTENOTITLE]]'''
+'''Step 2.Selecting the network'''
+Click on the Scan button and a second window will open. Find your Wireless access point in the list and double click on it. This will open another window.
+[[File:WIFI3.png|RTENOTITLE]]
+'''Step 3.Joining the network'''
+Double-click on the SSID of the access point to connect to, and then type in access password (if required)
+[[File:WIFI4.png|RTENOTITLE]]
+<span style="font-size:medium">'''Using the command line'''</span>
+*'''Step 1 Getting WiFi network details'''
+#check the label on your wifi card using the command
+<span style="font-family:courier new,courier,monospace">''#iwconfig''</span>
+#To scan for WiFi networks, use the command
+''#''<code>''sudo iwlist wlan0 scan''</code>
+*This will list all available WiFi networks
+&nbsp;
+*'''Step 2 Adding the network details to the Raspberry Pi'''
+Open the wpa-supplicant configuration file in nano text editor, use the following command
+''#sudo nano /etc/wpa_supplicant/wpa_supplicant.conf''
+#Go to the bottom of the file and add the following:
+''network={''
+''&nbsp;&nbsp;&nbsp; ssid="The_ESSID "''
+''&nbsp;&nbsp;&nbsp; psk="Your_wifi_password"''
+''}''
+In the case of the example network, we would enter:
+''network={''
+''&nbsp;&nbsp;&nbsp; ssid="CEH"''
+''&nbsp;&nbsp;&nbsp; psk="testingPassword"''
+''}''
+Now save the file by pressing '''ctrl+x''' then '''y''', then finally press '''enter'''.
+At this point, wpa-supplicant will normally notice a change has occurred within a few seconds, and it will try and connect to the network. If it does not, either manually restart the interface with the commands
+''#sudo ifdown wlan0<br/>#sudo ifup wlan0,''
+&nbsp;or reboot your Raspberry Pi with<br/>''#sudo reboot.''
+#verify if it has successfully connected using &nbsp;the command<br/>''#ifconfig wlan0''
+#(If not, check your password and ESSID are correct. )
+'''<span style="font-size:medium">LAN Configuration</span>'''
+*'''DHCP Configuration'''
+The Raspbian network configuration file is located at /etc/network/interfaces.
+Step 1 Open the network configuration file with the following command<br/>'''''#sudo nano /etc/network/interfaces'''''
+A default configuration looks like the following, where DHCP is used for wired Ethernet.
+[[File:ETH1.png|RTENOTITLE]]
+*<span style="font-size:small">'''Static configuration'''</span><br/>[[File:ETH2.png|RTENOTITLE]]
+'''Step 2 '''restart the network services to activate the change without reboot
+''#sudo service networking restart''
+'''Step 3''' check whether an IP address is set or not, type the <tt>ifconfig</tt> command.
+''#ifconfig''
+====== Pre-Lab Exercise 3:&nbsp; Setting up SSH (Secure Shell) to remote into the PI. ======
+*'''Step 1 Enter the raspberry config by entering the following command'''
+'''''&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; #''''' <code>sudo raspi-config</code>
+*'''Step 2 '''then navigate to<span style="font-family:courier new,courier,monospace">advance options</span>, then <code>ssh</code>, hit <code>Enter</code> and select <code>Enable or disable ssh server</code>.<br/>'''check the status of your interface use'''<br/><div>'''&nbsp;'''&nbsp;<span style="font-family:courier new,courier,monospace">#ifconfig -a</span><br/><br/></div>
+*'''Step 3 ssh into pi from another machine using the command'''<br/>&nbsp;&nbsp;&nbsp; #ssh pi@’ip-address’
 ====== Pre-Lab Exercise 4:&nbsp; Installing Applications on PI ======
-#– Updating System
+#
-##Installing the Python Package Manager(PIP)
-##Installing GPIO Library
+'''Now that we are connected to the internet'''
-#In-Lab Exercises
-##In-Lab Exercise 1: Realizing a AND gate
+#'''Step 1''' To begin installing software first update your system by entering the following command<br/><span style="font-family:courier new,courier,monospace">''#Sudo apt-get update && upgrade''</span>
-###Wire up the circuit
+#'''Step 2''' Installing python package manager by entering the following command<br/><span style="font-family:courier new,courier,monospace">''#Sudo apt-get install python-pip''</span><br/>(pip is a package management system used to install and manage software packages written in Python)
-###&nbsp;&nbsp;Edit the Program
+#'''Step 3''' Installation RPi.GPIO by entering the following command<br/><span style="font-family:courier new,courier,monospace">''#Sudo pip install rpi.gpio''</span><br/>(this allows you to access the raspberry pi general IO pins using the a numbering system BCM or BOARD)
-##In-Lab Exercise 2: Realizing a OR gate
-##In-Lab Exercise 3: Realizing a NOT gate
+GPIO layout
+[[File:GPIO.png]]
+Thus at the top of every python script, after importing the RPi.GPIO module, we set our GPIO numbering mode.
+As shown in the diagram below
+[[File:GPIO1.png]]

Difference between revisions of "Exploring The Raspberry Pi (USIU)"

Latest revision as of 20:55, 28 July 2015

Contents

Pre-Lab Exercise 1: Installing OS on Raspberry PI

Pre-Lab Exercise 2:Connecting Pi to the Internet

Pre-Lab Exercise 3: Setting up SSH (Secure Shell) to remote into the PI.

Pre-Lab Exercise 4: Installing Applications on PI

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