Hermod TV Panel

Installation

Beginning

• Create user hermod: (as root or sudo) adduser hermod
• Put it in the same groups as pi (other than the pi group): groups pi | sed 's/ /,/g', usermod -a -G group1,group2,... hermod
• Change pi and root passwords
• sudo apt remove wolfram-engine minecraft-pi
• sudo apt autoremove
• sudo apt update && sudo apt upgrade && sudo reboot
• sudo apt install git vim screen htop
• sudo date -s '2018-02-15 2:26:00' if needed (change the date to current date ofc)
• Generate RSA key ssh-keygen -t rsa -C "hermod.inno@gmail.com" -b 4096 and add it to gitlab
• Clone project in ~: git clone git@gitlab.viarezo.fr:hermod/tv_panel.git
• cp front/src/config.template.js front/src/config.js
• cp server/config.template.js server/config.js
• Useful links: ln -s ~/tv_panel/scripts/.screenrc ~/, ln -s ~/tv_panel/scripts/.vimrc ~/

Telegram message on statup to get IP address

• cp scripts/waitForNetwork /root/scripts/waitForNetwork
• cp scripts/startup-telegram-message /root/scripts/startup-telegram-message
• sudo vim /root/scripts/startup-telegram-message to add the token and chat id
• Add in root crontab (sudo crontab -e):

@reboot sleep 1 && /root/scripts/waitForNetwork && /root/scripts/startup-telegram-message

Boot config

vim /boot/config.txt to comment out dtparam=audio=on -> #dtparam=audio=on and add

# Serial
enable_uart=1
dtoverlay=pi3-disable-bt

Reboot

Download nodejs:

• wget https://nodejs.org/dist/v9.7.1/node-v9.7.1-linux-armv6l.tar.xz (to adapt to most recent version)
• tar xf node-v9.7.1-linux-armv6l.tar.xz
• sudo mv node-v9.7.1-linux-armv6l /usr/lib/nodejs/node-v9
• vim .profile to add:

# Nodejs
export NODEJS_HOME=/usr/lib/nodejs/node-v9
export PATH=$NODEJS_HOME/bin:$PATH

After reboot or log out - log in, npm install -g yarn

WS2812

• Wiring: VCC -> |<diode| -> 5V, GND -> GND, Data -> (resistor ~100 ohm) -> (pin 12 / BCM 18 / PWM0)
• sudo apt install scons
• git clone https://github.com/jgarff/rpi_ws281x.git && cd rpi_ws281x
• Edit main.c to put good stuff (width height for testing)
• scons
• sudo ./test to test
• follow ./python/README.md for python installation

To display a status LED without root

• cp scripts/statusRGB_listener.py /root/scripts/statusRGB_listener.py (from tv_panel directory)
• Add in root crontab (sudo crontab -e):

@reboot /usr/bin/python3 /root/scripts/statusRGB_listener.py

• Reboot or run /usr/bin/python3 /root/scripts/statusRGB_listener.py & as root
• To display a color for t seconds (float): echo "55ee33 1" > /dev/rgb_pipe

Disable screen sleeping

vim .config/lxsession/LXDE-pi/autostart to add

@xset s noblank
@xset s off
@xset -dpms

RFID reader

• Wiring: VCC -> 5V, GND -> GND, RX -> TX, TX -> RX
• In sudo raspi-config, disable serial messages but enable serial interface

wget https://github.com/nfc-tools/libnfc/releases/download/libnfc-1.7.1/libnfc-1.7.1.tar.bz2
tar xvjf libnfc-1.7.1.tar.bz2
cd libnfc-1.7.1
./configure --prefix=/usr --sysconfdir=/etc
make
make install
sudo mkdir /etc/nfc
sudo cp libnfc.conf.sample /etc/nfc/libnfc.conf
sudo mkdir -p /etc/nfc/devices.d
sudo cp contrib/libnfc/pn532_uart_on_rpi.conf.sample /etc/nfc/devices.d/
sudo cp contrib/udev/42-pn53x.rules /lib/udev/rules.d/