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Control screen

Raspberry setup

VNC config

Just go to menu /Preference / Raspberr pi Configuration / Interface to activate VNC Use "VNC viewer" app. to view the screen

Start chromium in kiosk mode

Launch Chromium at boot in full screen (kiosk mode)

See Philippe Garry blog 

cd ~/.config/autostart/
vi ~/.config/autostart/autoChromium.desktop
Within the file "autoChromium.desktop" add the following text to the bottom of the file. 
[Desktop Entry]
Type=Application
Exec=/usr/bin/chromium-browser --noerrdialogs --disable-session-crashed-bubble --disable-infobars --kiosk http://www.google.com
Hidden=false
X-GNOME-Autostart-enabled=true
Name[en_US]=AutoChromium
Name=AutoChromium
Comment=Start Chromium when GNOME starts

reboot

Quit kiosk mode

Alt+F4 (or Mac : fn + Cmd + F4)

Add to homeassistant configure.yaml file : 

homeassistant:
    auth_providers:
        - type: trusted_networks
            trusted_networks:
                - 10.0.4.130
                - 10.0.4.142
            trusted_users:
                10.0.4.130: 4c40eb4c2c7e4a22b1857658af4735b8
                10.0.4.142: 4c40eb4c2c7e4a22b1857658af4735b8
           allow_bypass_login: true
        - type: homeassistant

How to mount Raspberry on Mac OS

See Pi My Life Up

sudo apt update
sudo apt upgrade
sudo apt install netatalk
sudo vi /etc/netatalk/afp.conf
copy below 
[Homes]
    basedir regex = /home
Restart 
sudo systemctl restart netatalk

Write this IP down as we will need it for connecting to the shared drive.

sudo hostname -I

Setup PIR sensor

Wire

Time Delay Adjustment

Files

Create file : /home/pi/Desktop/Cuisine/pir.py

import sys
import time
import RPi.GPIO as io
import subprocess

io.setmode(io.BOARD)
SHUTOFF_DELAY = 120 # seconds
PIR_PIN=11

# Attention, apres une detection, le PIR renvoyer 1 pendant une 15aine de seconde

def main():
    print ("Detection started.")
    print ("Wait", SHUTOFF_DELAY, "sec before all is OK")
    io.setup(PIR_PIN, io.IN)
    turned_off = False
    last_motion_time = time.time()
    while True:
        if io.input(PIR_PIN):
            last_motion_time = time.time()
            sys.stdout.flush()
            if turned_off:
                turned_off = False
                turn_on()
                print ("ON")
        else:
            if not turned_off and time.time() > (last_motion_time + SHUTOFF_DELAY):
                turned_off = True
                turn_off()
                print ("OFF")
            if not turned_off and time.time() > (last_motion_time + 1):
                time.sleep(.1)

def turn_on():
    subprocess.call("sh /home/pi/Desktop/Cuisine/monitor_on.sh", shell=True)

def turn_off():
    subprocess.call("sh /home/pi/Desktop/Cuisine/monitor_off.sh", shell=True)

if __name__ == '__main__':
    try:
        main()
    except KeyboardInterrupt:
        io.cleanup()

Create file : /home/pi/Desktop/Cuisine/monitor_on.sh 

vcgencmd display_power 1 > /dev/null
Create file : /home/pi/Desktop/Cuisine/monitor_off.sh 
vcgencmd display_power O > /dev/null

Warning

If "vcgencmd" and "tvservice" doesn't work on your Raspberry pi 4 like this: 

pi@raspberrypi:~ $ vcgencmd display_power 0
display_power=1

pi@raspberrypi:~ $ tvservice -l
tvservice is not supported when using the vc4-kms-v3d driver.
Similar features are available with standard linux tools
such as modetest from libdrm-tests.
then you can modify the "/boot/config.txt" file by replacing vc4-kms-v3d with vc4-fkms-v3d like this 
# Enable DRM VC4 V3D driver
dtoverlay=vc4-fkms-v3d
max_framebuffers=2
Thank's a lot to Fuzz The Pi Guy

Edit the file /etc/rc.local using the editor of your choice. You must edit it with root permissions:

sudo vi /etc/rc.local
Add

sudo python /home/pi/sample.py &

Remove scren saver

In order to prevent sleep mode in Desktop mode, we will simply add a screensaver since it is not present by default, and we will be able to configure it precisely to prevent sleep mode.

  • Open the terminal and type the command : sudo apt-get install xscreensaver
  • Reboot the Rasp.
  • go to the applications / Menu / Preferences / Screensaver.
  • In the window that opens, all that's left is to choose to disable the screensaver from the drop-down list at the top left.