Chapter 3 Raspberry Pi Installation

Purpose

This document describes how to set up a Raspberry Pi for the underlying demo devices described here:

• Chapter 4 RWIS and Car Simulator
• Chapter 5 Serial DMS

Read those documents and come back to this section as necessary during the build process.

SD Card Setup

1. Download Etcher and install it
2. Download the latest Raspbian "Lite" image here
3. Insert the SD card into your computer
4. Run Etcher
5. Select the Raspbian image .zip file
6. Select the SD card as the target
7. Wait for the image to be written to the SD card
8. Physically remove the SD card from the computer and plug it into the Raspberry Pi

Pi Zero W Console Setup (Recommended)

1. If you are setting up the Pi Zero W and don't have a micro HDMI adapter you can leave the SD card connected to your computer and edit /boot/config.txt to enable the serial console by putting the following lines at the end of the file:

# Enable serial console
enable_uart=1

2. Unmount the SD card and install it in the Pi Zero.
3. Use a USB FTDI cable (RX to RX, TX to TX) and something like minicom -D /dev/tty.usbserial-AH02M4JF to connect to the Pi Zero and you should see the boot-up sequence and eventually a login prompt

Initial Raspbian Setup

Connectivity and Console Access

1. Connect the full-size Pi to a USB keyboard and HDMI monitor or use the USB FTDI cable with the Pi Zero W as described above
2. Plug the Pi into power

• The full-size Pi (Serial DMS) will be powered using the DC barrel jack on the RGB Matrix Hat and the 4A 5V DC power supply
• The Pi Zero W (RWIS and Car Simulator) will be initially powered using the micro USB 2.4A 5V DC power supply

3. Log into the Pi for the first time using the username pi password raspberry

Raspi-Config

1. Perform some basic system configuration

sudo raspi-config

• Localization Options
• Change Locale
• Unselect en_GB.UTF-8 UTF-8
• Select en_US.UTF-8 UTF-8
• Select OK
• Choose the US locale you just added as the default (en_US.UTF-8 UTF-8) and then OK

Each time you will have to go back through the main menu again

• Change Timezone
• Navigate and pick the time zone that best matches your Pi's location

If you are configuring the Pi Zero W the Change Keyboard Layout option will fail so just skip it.

• Select Generic 101-key PC and then OK
• Select Other and then OK
• Select English (US) and then OK
• Select English (US) and then OK
• Select The default for the keyboard layout and then OK
• Select No compose key and then OK
• Change Wi-Fi Country
• Select US United States and then OK
• Enable the SSH Server
• Select Yes when prompted to enable the SSH server

2. Select Finish and then Yes to reboot

Wi-Fi Setup

1. Log in again as the pi account
2. Edit the wpa-supplicant configuration file with the SSID and PSK you configured on the IR829. You can ignore the existing lines and put the network configuration after them.

sudo vi /etc/wpa_supplicant/wpa_supplicant.conf

network={
        ssid="demo1-devices"
        psk="cisco123"
}

3. Reboot to make the changes take effect

sudo reboot

4. After the reboot you can check whether it was successful with the following

ifconfig wlan0

If Wi-fi connectivity fails you may have a typo in your wpa-supplicant configuration. Double-check the values as they correspond to your Wi-Fi network and try again as you will need Internet connectivity to perform the rest of the installation.

Now that the Pi is connected to Wi-Fi it will be easier to continue the configuration via SSH. Make note of the IP address from the ifconfig command output above and connect there.

Update the Raspberry Pi

1. Perform an initial update of the Pi, accepting any recommended packages

sudo apt update
sudo apt dist-upgrade

Set Up Users

1. Create the picon account

sudo su -
adduser picon --disabled-password --quiet --gecos "Pi Console"
usermod -a -G adm,dialout,cdrom,sudo,audio,video,plugdev,games,users,input,netdev,spi,i2c,gpio picon
passwd picon

Set a secure password and record it for future reference

2. Exit the pi account console session and log in as the picon user with the credentials you just created
3. Remove the default pi account

sudo deluser pi --remove-home --quiet

Back to Chapter 4 RWIS and Car Simulator

Back to Chapter 5 Serial DMS