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Download and run the Atmel Studio web installer from the official download page, and follow the instructions. This will also install the necessary drivers for the embedded debugger on the Xplained Pro board.

Prepare the SAM C21 Xplained Pro

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The Xplained Pro has three extension headers (EXT1, EXT2, EXT3) with pins as listed in Table 1: Connect the mote to one of the mote headers as per the mapping in Table 2. In Figure 2 you can see the mote connected to EXT1, but it does not matter which one you use: The pins for UART RX/TX are all connected to the same pins on the SAM C21.

Connect Debug USB to Computer

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Connect a USB cable from your computer to the USB-micro port labeled DEBUG USB: This is the port on the top of the Xplained Pro board (visible in both Figure 1 and Figure 2), and is used to program, debug and power the board.

The debug USB also spawns a virtual serial port named EDBG Virtual COM Port. Make sure to note the name, e.g. COM4 in the example pictured below, as we will open a terminal on said port to see debug prints.
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Open Debug Terminal

The SimplePublish example code will send all standard input/output (e.g. debug prints) through the serial port you identified in the previous section. Open your favourite serial terminal and connect to it with the following configurations:

• Baudrate: 115200
• Data Bits: 8
• Parity: None
• Stop Bits: 1