Update README.md

devices/hmi/README.md

@@ -1,6 +1,14 @@
 # Low-cost ICS Testbed - HMI
 
-## Installation
+## Usage of the Raspberry Pi Release Images
+
+https://github.com/hsainnos/LICSTER/releases
+
+## Installation (Not necessary if Releases are used)
+
+### Running Raspberry Pi with Desktop
+
+Recommended and tested with Raspberry Pi OS (32-bit) with desktop on a Raspberry Pi 3.
 
 ### Clone the repository
 
@@ -11,6 +19,11 @@ mkdir gits
 cd gits
 ```
 
+Install git software on the Raspberry Pi
+```
+sudo apt install git
+```
+
 Clone the git of the low cost testbed.
 
 ```
@@ -29,7 +42,7 @@ cd ~/gits/LICSTER/devices/hmi
 #### Install unclutter to disable the mouse pointer on the HMI.
 
 ```
-sudo apt install unclutter npm
+sudo apt install unclutter npm python3-pip xinit lxde-core lxterminal lxappearance lightdm
 ```
 
 #### Install the python dependencies.
@@ -134,3 +147,40 @@ The HMI shows, that it is disconnected even though everything is connected as it
 
 To fix this problem you can either flash the SD card of the PLC again or remove the gits repository from the PLC and follow the installation instructions for the PLC.
 
+#### Screen rotation
+
+Edit the boot configuration file of the Raspberry Pi.
+```
+sudo nano /boot/config.txt
+```
+
+Add the following line at the end of the file.
+```
+lcd_rotate=2
+```
+
+
+#### Power warning
+
+Edit the boot configuration file of the Raspberry Pi.
+```
+sudo nano /boot/config.txt
+```
+
+Add the following line at the end of the file.
+```
+avoid_warnings=1
+```
+
+#### Auto login problem
+
+Start the Raspberry Pi configuration screen:
+
+```
+sudo raspi-config
+```
+
+Select "3 Boot Options" and "B4 Desktop Autlogin Desktop GUI, automatically logged in as 'pi' user".
+Exit and save.
+
+