Update README.md

Slimmed down some manual parts by creating a FAQ

README.md

@@ -24,7 +24,7 @@ Check: Set username and password
        password: YourOwnPassword
 
 If you plan on using wireless LAN / WLAN / Wifi do not enter any SSID or Password.
-Read the instructions in the next section for usage of wireless LAN!
+Read the instructions in the next section: Enabling wireless LAN.
 
 Check: Set locale settings
        Time zone: can be anything
@@ -36,17 +36,18 @@ Persistant settings:
 Press the WRITE button and wait untill the Imager has written the OS.
 When this is done close the Imager.
 
-If you're not planning on using wireless LAN safely eject the SD card, setup your Pi and boot from the SD card.
+If you're not planning on using wireless LAN:
-Continue on the section: Setup the Pi
+safely eject the SD card, setup your Pi and boot from the SD card.
-Otherwise read the section: Enabling wireless LAN
+
+Continue on the section: Setup the Pi.
+Otherwise read the section: Enabling wireless LAN.
 ```  
 
 ## Enabling wireless LAN:
 ```
-IMPORTANT! If you're planning to use 5GHz wireless LAN do NOT use the HDMI-1 port.
+IMPORTANT!!!
-This can cause bad interference with the wireless radio due to HDMI signals at certain screen resolutions.
+If you're planning to use 5GHz wireless LAN do NOT use the HDMI-1 port.
-Use the HDMI-0 port (the port closest to the power/USB-C connection).
+Read the FAQ section at the end of this manual to learn which port is HDMI-1
-When using 2.4GHz wireless LAN this is not an issue and you can choose wich HDMI port to use.
 
 Close the Raspberry Pi Imager.
 
@@ -67,7 +68,7 @@ Be aware to make sure there is no .txt extension in the filename!
 You can now eject the SD card, setup your Pi and boot from the SD card.
 
 Remember: you MUST use a LAN cable for the initial setup!!!
-After running the installer in the last section of this readme you can disconnect the LAN cable!!!
+The installer will tell you when it's safe to unplug the LAN cable.
 
 ```  
 
@@ -104,4 +105,127 @@ Continue to the next section: Running the installer.
 ```
 wget https://raw.githubusercontent.com/Beeranco/PiAutomation/main/Installer.sh -O /tmp/installer.sh  
 bash /tmp/installer.sh
-```  
+```
+
+
+## FAQ:
+```
+### Why is this manual Windows only? ###
+If you're a Linux user you must be smart or stupid enough to write to a SD card.
+Otherwise: Google is your friend!
+Hate me already for using Google?, you must be a real Linux user! DuckDuckGo is your best friend...
+
+
+
+
+### Which Pi can I use? ###
+This script is made and tested on a Raspberry Pi 4 2GB model.
+A Pi 4 4GB or Pi 4 8GB would also work!
+
+Older Pi's could experience slowdown and out of memory errors when running all of the
+installer options due to limited resources and RAM logging (RAM logging explained below).
+
+In the future the installer will calculate the total amount of RAM installed
+and in the case of a Pi 4 1GB model disable the /tmp folder as RAM mounted
+
+
+
+
+### 1GB of ram not good enough? ###
+It's not the case of not being good enough, the Pi's all suffer from a major flaw:
+the SD card.
+
+Since this script is meant to transform your Pi into an automation hub that will
+propably run 24/7 as a piece of infrastructure in your network failing is not an option.
+
+Over time due to the writing of logs the SD card will wear out,
+this means it wont be readable or writable just gone with all your data and programs.
+
+It's always important no matter what you run to have backups,
+but I also believe if there's a common problem that there must be a common solution!
+
+The most commonly written to locations are /tmp and /var/log.
+You've guessed it! /tmp is for all the temporary files the OS uses
+and /var/log contains all the logs.
+
+In this script we use an FSTAB mount entry that converts the /tmp folder from being
+mounted to the SD card to being mounted to a slice of RAM in order to prevent
+all these little write cycles to the SD card and wearing it out.
+
+This also means that the more data is stored in the /tmp folder the more RAM usage you'll have
+since /tmp is only "cleaned" on a shutdown or reboot,
+and all these "little" files WILL add up in the amount of RAM usage.
+
+The /var/log is managed by a little program called Log2RAM and does exactly what you'll think!
+Storing all the logs in the RAM that is currently limited to use 256MB of space.
+
+This program automaticly syncs every 24 hours to the SD card creating a backup in case of a power outage,
+and saves to the SD card when you reboot or shutdown the system.
+Only in the case of a sudden power loss the logs will be gone since RAM is volatile memory.
+The logs that have been synced to the SD card in the last 24 hour period will be available.
+
+
+
+
+### How to backup your SD card? ###
+Well now I'm scared of losing all of my data! How to backup?
+
+There's a little program called Win32DiskImager, Google it and install it.
+When running Win32DiskImager select you SD card under Device and set the Image File to a path on your system.
+For example: C:\Users\Administrator\Documents\PiBackup.img
+
+Press Read and wait for it to finish! Eject the SD card and get your Pi running again!
+In order to restore the image on the SD card after a failure or new SD card,
+do the same thing again with Win32Disk imager but this time you press Write with the .img file selected.
+
+
+
+
+### Why use a LAN cable when I'm planning on going wireless? ###
+Since Debian or Pi I don't know what the wireless radio is disabled / blocked
+untill you're running the command: rfkill unblock wifi
+
+In order to run headless (without a monitor and keyboard) we need the
+LAN cable to connect via SSH and run the script that also enables the wireless radio
+
+
+
+
+### HDMI-0 or HDMI-1? You really think I what ports are where?! ###
+Quick explanation: HDMI-0, closest to the USB-C / Power port!
+HDMI-1, furthest away from the  USB-C / Power port!
+
+
+
+
+### Why write a wpa_supplicant.conf? The Raspberry Pi Imager can setup wireless LAN? ###
+
+Yes and no.
+While the Raspberry Pi Imager does in fact write your SSID and Password to your Pi
+even though you have selected your country code this will not be included in the
+generated wpa_supplicant.conf.
+
+This makes it impossible to enable the radio that makes your wireless LAN go beep-beep-boop.
+In the example config for the wpa_supplicant.conf the country code is already configured,
+with this your wireless LAN can and will go beep-beep-boop.
+
+
+
+
+### Really? I can't even choose what HDMI port I use? ###
+Well here's where things get complicated! For some arbitrary reason when using
+5GHz wireless LAN and HDMI-1 the radio gets confused due to the HDMI cable
+interfering with the radio signals.
+
+This has been an issue on the Pi 4 since the release in 2019...
+Users have reported the wireless LAN refusing to connect, connecting but dropping out
+or barely working with a ping over 5000ms, so connecting via SSH won't even work.
+
+There are some workarounds users have found by running resolutions other then 1920x1080,
+like for example 1280x720, 2560x1440 or 1600x1200 and even going so far to change the
+refresh rate or Hz on a 1080p signal to resuscitate the 5GHz radio.
+
+But to be safe, use HDMI-0 if you're planning on using 5GHz wireless LAN
+or when choosing 2.4GHz wireless lan cause this bug won't affect you and
+you can do whatever with your HDMI ports!
+```