Made HOWTO a tiny bit better.

Documentation/HOWTO-change-firmware-and-compile-it_MeesElectronics.md

@@ -2,14 +2,18 @@
 
 ## Dependencies
 
-Make sure 'git', 'make', 'python' and 'pip' are instaled. Most like;y these are already availble on your system. Otherwise do:
+Make sure *git*, *make*, *python* and *pip* are instaled. Most likely these are already availble on your system. Otherwise do:
 
     $ sudo apt install git
     $ sudo apt install make
     $ sudo apt install pip
     $ sudo apt install python
 
-Download arduino-cli
+Install Reticulum:
+
+    $ pip install rns --break-system-packages
+
+Download arduino-cli:
 
     $ cd
     $ curl -fsSL https://raw.githubusercontent.com/arduino/arduino-cli/master/install.sh | sh
@@ -18,7 +22,7 @@ Add arduino-cli to path by editing ~/.bashrc
 
     $ nano ~/.bashrc
 
-    add 'export PATH=~/bin:$PATH' to end of file
+Add `export PATH=~/bin:$PATH` to end of file. Exit with `CTRL-x` and type `y` to save the changes.
 
 ## Clone git repo