Udoo features a built in USB to serial interface which is very useful for various reasons: You can use it to connect Udoo via SSH without a network connection, programming the Sam3x (arduino) and access the debug console for troubleshooting purposes.

Connecting via serial will practically result in a shell console, the same as the one you’ll obtain through SSH connection (http://en.wikipedia.org/wiki/Secure_Shell).

Connecting via Serial from Windows

• Download the serial adapter Driver here:
  http://www.silabs.com/products/mcu/pages/usbtouartbridgevcpdrivers.aspx
• Install the proper version for your Operating system:
  CP210xVCPInstaller_x86.exe for 32-bit systems
  CP210xVCPInstaller_x64.exe for 64-bit system
  How to define your Windows version:
  http://windows.microsoft.com/en-us/windows7/32-bit-and-64-bit-windows-frequently-asked-questions
• Download and install a software called putty
  http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html
• Open putty and configure it as follow:
  Connection type “serial”
  Port: “COM3” (please note that this value may be different, try to use COM4 if COM3 is not working)
  Speed: “115200”
  Save it as “Udoo-serial” for future uses.
  
• Connect the serial port of UDOO (CN6) to your PC using the micro USB cable.
• Power up UDOO
• Click Open
• You’re in! You’ll be able to see the startup process and access to the remote shell console on UDOO.
  

Connecting via Serial from Linux

• Connect the serial port of UDOO (CN6) to your PC using the micro USB cable.
• Type

  dmesg

• You should see this line at the end

  usb 2-2.1: cp21x converter now attached to tty

  

• Install minicom:

  sudo apt-get update
  sudo apt-get install minicom

• Open Minicom and configure it (only the first time) using the following command:

  sudo minicom -sw

• Go to “Serial port setup” and edit as follow:
  Serial Device: /dev/ttyUSB0 (type a key)
  Hardware Flow Control: No (type f key)
  Software Flow Control: No (type g key)
  
• Press exit and “Save setup as dfl”
• Exit from Minicom
• Let’s give proper access permissions to serial port with:

  sudo chmod 666 /dev/ttyUSB0

• Now we can start listening with:

  sudo minicom -w

• Power cycle UDOO to see the boot process and connect it to serial console shell

Connecting via Serial from Mac

• Download the serial adapter Driver here:
  http://www.silabs.com/products/mcu/pages/usbtouartbridgevcpdrivers.aspx
• Connect the serial port of UDOO (CN6) to your PC using the micro USB cable.
• Download and install Serial Tools https://itunes.apple.com/it/app/serialtools/id611021963 or directly from the Apple Store
• Open Serial Tools, and change the following parameters:
  Serial Port: “SLEB_USBtoUART”
  Baud rate “115200”
  
• Hit connect, and here you go!
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