Wer ist denn der fesche Bursche da ab Minute 3:00 😀
Author: webfraggle

Feynsinn VR Paintshop – Virtuelles Lackieren
Unser Feynsinn virtuelles Lackiertraining ist sehr erfolgreich.
Und an der Entwicklung der umgebauten Pistole habe ich einen sehr großen Anteil.

Mein digitaler Bilderrahmen
Und da ist er. Mein selbst gebauter und selbst programmierter digitaler Bilderrahmen aus den Teilen meines alten Formac 2010 Monitor. Der ist zwar alt, hat aber immer noch eine tolle Farbwiedergabe. Nettes Detail, ein E-Ink Display mit Informationen zum Bild.


GIT Repo Updates
I just updated my GIT Repos.
1. I uploaded my current version of my SmartHome Display
https://github.com/webfraggle/SmartHomeWebRemote
2. Added a LG WebOS Websocket Proxy
https://github.com/webfraggle/lg_websocket_proxy
Rotate Pimoroni Hyperpixel 90°
Display Rotation
First change display rotation in /boot/config.txt
Edit Hyperpixel touch driver
Then you need to edit the touch driver. Luckily it is a python script. I have the Information from here https://forums.pimoroni.com/t/hyper-pixel-rotate/5276/4. But the script has changed.
So here are my changes.
In the upper part Exchange 480 by 800 and viceversa:
(e.ABS_Y, AbsInfo(value=0, min=0, max=800, fuzz=0, flat=0, resolution=1)),
(e.ABS_MT_SLOT, AbsInfo(value=0, min=0, max=1, fuzz=0, flat=0, resolution=0)),
(e.ABS_MT_TRACKING_ID, AbsInfo(value=0, min=0, max=65535, fuzz=0, flat=0, resolution=0)),
(e.ABS_MT_POSITION_X, AbsInfo(value=0, min=0, max=480, fuzz=0, flat=0, resolution=0)),
(e.ABS_MT_POSITION_Y, AbsInfo(value=0, min=0, max=800, fuzz=0, flat=0, resolution=0)),
and in the lower part Exchange x and y and add flipping the coordinates.
Restart hyperpixel touch daemon
Raspberry Pi autostart chromium on login
To autostart chromium on start / boot, without Desktop Environment, you have to do the following:
1. Install Chromium
My tutorial to install chromium an Raspberry Pi without desktop Environment.
2. Use raspi-config to configure
-> Boot Config
–> Desktop / CLI
—> Console Autologin
2. Add your start script at the end of „.bashrc“
Mine is
Don’t forget the xinit.
My startscript Looks like this:
# Turn off HDMI to safe energy
sudo /opt/vc/bin/tvservice -o
# I want no Cursor, but this doesn't work
# Rotate touch input by 90°
matchbox-window-manager -use_cursor no -use_titlebar no &
xinput set-prop 'FT5406 memory based driver' 'Coordinate Transformation Matrix' 0 -1 1 1 0 0 0 0 1
# Power saving and screensaver after 2 minutes
xset dpms 120 120 120
# watch gpio pin for Motion sensor and start chromium with some options
gpio-watch -e rising 4&
chromium-browser --fast --fast-start --disable-popup-blocking --disable-infobars --kiosk --incognito --disable-session-crashed-bubble --touch-events=enabled --allow-running-insecure-content https://yoururl/

Raspberry Pi: Rotate Official Touch Display by 90°
I wanted to rotate my Rasperry Pi Touch Display by 90 degrees. But I noticed this isn’t possible via boot parameters in the config.txt file.
It is possible to rotate the display in config.txt, but the touch input will not work correctly. There is also a change in the newest raspbian xinput driver releases.
does NOT work anymore.
So here is the solution:
1. Rotate Display in /boot/config.txt
Add line:
2. Install xinput
3. Find your Driver
Or over SSH:
4. Rotate touch input via xinput
You need to matrix transform the input coordinates
Exit screensaver on Raspberry Pi with motion sensor
Hardware
I want to build a smart home display for my living room. Additionally it should go to to sleep/screensaving automatically and I want it to wake up if someone walks by.
So I buyed a cheap infrared PIR motion sensor.
Something like this:
Look at amazon
Then I connected it to 5V, GND and GPIO Pin 4:
Search Google for images
And now the software part
I tried some Python scripts but for my case these were not robust enough. To exit the screensaver you Need to execute some console commands.
First: Configure screensaver
This sets the screensaver and power management to power off after 2 minutes
Second: Exit screensaver from console
xset dpms force on
This code resets the timer and brings on power again.
Third: Do it on GPIO event
After some Fails I found GPIO-Watch, a small utility that watches GPIO events and executes shell scripts.
Preparation
1. Download
2. Unzip
3. Enter Directory
4. Build
sudo make install
Configuration
1. Create a script named „4“ under /etc/gpio-watch because gpio-watch will later execute this on rising on GPIO pin 4.
2. Put your commands into the script
#echo 'set on'
xset s reset
xset dpms force on
3. Let gpio-watch watch your Pins
Installing Chromium on Raspberry Pi without desktop
Start with a Rasbian light version.
Install chromium and x-server
sudo apt-get install xserver-xorg
sudo apt-get install xinit
If you now start chromium-browser it will show the following error:
Gtk-WARNING cannot open display
this is because you have to start it with xinit:
Chromium will start, but you will need a minimal window manager.
Now you need a shell script to start your chromium
Insert the following lines, Exit with ctrl+x, Y and Enter.
matchbox-window-Manager -use_cursor no&
chromium-browser
Start it now with:
Add Chromium options as you like. E.g. –Kiosk –allow-running-insecure-content plus your URL