anchor.diff:  
   === Install toolchain
   
  -Download the toolchain to your development machine
  +Download the toolchain to your development machine (PC x86 Linux)
   
   [source]
   ----
  
positive.code: 
  [NOTE]
  ====
  Before run it open a new terminal to remove possible old environments!!
  ====
  
  [source]
  
negative.code: The default usage of the UART Interface is serial console.
  To use the UART we must turning off the UART functioning as a serial console.
  
  [WARNING]
  ====
  The Raspberry Pi 3 does not use the correct baud rate in Raspian out of the box, so kBerry will
  not work. To fix this, the overlay pi3-miniuart-bt-overlay must be activated.
  [source]
  ----
  sudo sh -c "echo dtoverlay=pi3-miniuart-bt-overlay >>/boot/config.txt"
  ----
  ====
  
  Open /boot/cmdline.txt and remove *console=ttyAMA0,115200* from the file
  For Raspbian Jessie and newer the entry is *console=serial0,115200*
  [source]
  ----
  sudo nano /boot/cmdline.txt
  ----
  
  [Versions before Raspbian Jessie] Open /etc/inittab and out comment the usage for ttyAMA0.
  To do so add a *#* at the start of the line with ttyAMA0.
  [source]
  ----
  sudo nano /etc/inittab
  