Additional instructions.

README.md

@@ -21,9 +21,17 @@ Winlink Password & Grid Square
 # Install
 This script is intended to run on a brand new installation of Buster. It should not be run on a pi that you have already started installing applications on. Install additional apps that you require after running this script.\
 \
-Flash a fresh copy of  Buster to a SD card and run the following command
+Get Debian Buster from https://cdimage.debian.org/debian-cd/current/arm64/iso-cd/ file debian-10.4.0-arm64-xfce-CD-1.iso
+NOTE: The Debian Buster arm64 image does not come with RealVNC server pre-installed, as it does with Raspbian. The reason is that RealVNC package is currently compiled for the armhf version of libbcm_host.so, which is a hook into the Broadcom GPU chip. As of 2020-06-27, it is not yet possible to get Debian Buster ARM64 to work with VNC.
 
-     git clone https://github.com/km4ack/pi-build.git $HOME/pi-build && bash $HOME/pi-build/build-a-pi
+If this is a problem for you, then you will need to download Raspberry Pi OS (previously called Rasbian) 32-bit from https://downloads.raspberrypi.org/raspios_armhf_latest
+
+Use a USB flash application such as Balena Etcher to copy the iso file to a USB key, get it at https://www.balena.io/etcher/
+
+Power up your Raspberry Pi, login, and in your home directory, run the following command
+
+     git clone https://github.com/km4ack/pi-build.git \
+      $HOME/pi-build && bash $HOME/pi-build/build-a-pi
      
 # Video
 [![IMAGE ALT TEXT](https://img.youtube.com/vi/l4M9VVqGxoc/0.jpg)](https://youtu.be/l4M9VVqGxoc "Build a Pi")
@@ -44,6 +52,9 @@ Software for DS3231 real time clock (Available through update script after initi
 #### HOTSPOT:
 Hotspot is used to generate a wifi hotspot that you can connect to with other wireless devices. This is useful when in the field so you can connect to and contol the pi from a wireless device.
 
+If enabled, the hotspot will only activate IF the Pi is not connected to a wireless network.  The hotspot will either activate at bootup, OR a maximum of 5 minutes AFTER you have forcefully disconnected from a wireless network. You can tune that detection delay in the settings.
+The hotspot default SSID is *RpiHotspot* and the default IP address of the Pi is 10.10.10.10.
+Make sure to enable either VNC or SSH server in order to remotely connect to your Pi at that address.
 #### Hotspot Tools:
 Hotspot tools is a collection of tools designed to make managing the hotspot easier through a GUI interface. https://youtu.be/O_eihSN_ES8
 
@@ -144,4 +155,4 @@ Calculate lengths needed for dipole legs
 Graphic viewer to view/manage log files
 
 #### Gparted
-Disk utility
+Disk utility