PM-2.5-Air-Quality-Network

Step-by-step instructions of how to build an open-source PM 2.5 air quality sensor network.

Step 1: Raspberry Pi Basic Setup

::: INSTALL THE RASPBIAN OPERATING SYSTEM :::

• Go to https://www.raspberrypi.org/downloads/raspbian/ and download the latest version of Raspbian Stretch with Desktop.
  • The version used for our web server is Kernel 4.14, release date 2018-04-18

• Use Etcher to Flash the image from the zip file to the microSD card for your Raspberry Pi.

  • https://etcher.io/

  ::: INSTALL THE VNC SERVER, CHANGE THE KEYBOARD LAYOUT, CHANGE THE TIMEZONE :::

• I like to do everything from a VNC, so the next thing to do is go to your Terminal and run the command "sudo apt-get update".
  • This is standard procedure anytime you install something.
• Now, run the command "sudo apt-get install realvnc-vnc-server".
• When that is done, run the command "sudo raspi-config".
  • Next, I will fix the keyboard which is set up to UK standards rather than US.
    • Select "Localisation Options".
    • Select "Change Keyboard Layout".
    • My keyboard automatically updated to the correct configuration, if yours does not then just follow the prompts.
  • Also, let's fix the Timezone.
    • Select "Localisation Option".
    • Select "Change Timezone".
    • Follow the prompts, I selected "US", "Central".
  • Finally, let's do what we came to do and enable VNC Server.
    • Select "Interfacing Options".
    • Select "VNC" and Enable it.

• An Icon should have appeared in the upper-right hand corner with the letters "vnc" in a square, click this icon.

  • Sign in or create an account by following the link to start VNC Server.
  • Install VNC Viewer on any computer you would like to log-in to the raspberry pi from.
    • When it is time to login, the default username and password on your pi is user: "pi" password "raspberry".
    • Awesome! Now, we have the capability for remote access!

  ::: CHANGE THE DEFAULT USERNAMES AND PASSWORDS :::

• From the terminal, use the command "sudo passwd root" to change the root user password.
  • Change the password to whatever you would like.
  • Click the Raspberry at the top-right corner, go to "Shut Down", then select "Logout".
    • If you are logged in remotely, this will not log you off.
  • Change the user from "pi" to "Other...".
  • Login with the username: "root" and the password that you set.

Step 2: The Apache Web Server

• From the terminal, run the command "sudo apt-get update".
• Run the command sudo apt-get install apache2 -y
  • Great! Now, we have a web server. From your raspberry pi, you can go to http://localhost/ to access your website!

Step 3: Install PostGRE SQL instructions.

Step 4: Install PHP

• From the terminal run the command "sudo apt install php7.0 php7.0-pgsql