Hello World Example¶

The Hello World Example can be used as a start point of Zephyr application development. This example is quite simple and just prints “Hello World” to the console.

Before you start building, the Zephyr development environment should be set up correctly:

Build the example¶

You can find the source code and the project file of the example in the following folder: examples/zephyr/hello-world.

Build the example by performing the following steps:

Open terminal and navigate to the m2devkit directory created in the Setup the toolchain section:
```
cd <sourcecode_root>/m2devkit
```

Use west to build the example:

west build -b nrf52840_m2 nrf52840-m2-devkit/examples/zephyr/hello_world

Tip

If a build system is present, make the build folder pristine before building:

west build -t pristine

Flash the example¶

After compiled successfully, the firmware is located in m2devkit/build/zephyr with the name zephyr.hex.

Connect the debugger USB port to your PC using the provided USB-C Cable. A disk drive called M2-DOCK will be automatically detected by the computer.

Run the following command to flash the board:

west flash

Testing¶

Test the Hello World Example application by performing the following steps:

Run a terminal application like PuTTY or screen:
```
screen /dev/cu.usbmodem14102 115200
```
Press RESET button, and observe the output of the terminal:

Create an Issue¶

Interested in contributing to this project? Want to report a bug? Feel free to click here: