Zigbee: Light bulb

This sample demonstrates a simple light bulb whose brightness can be adjusted by another device.

You can use this sample with the Zigbee Network coordinator and Zigbee Light switch samples to set up a basic Zigbee network.

Requirements

The sample supports the following development kit:

Hardware platforms

PCA

Board name

Board target

nRF54L15 DK

PCA10156

nrf54l15dk

nrf54l15dk/nrf54l15/cpuapp

To test this sample, you also need to program the following samples:

Overview

The Zigbee light bulb sample takes the Zigbee Router role and implements the Dimmable Light device specification, as defined in the Zigbee Home Automation public application profile. This profile allows changing the brightness level of the light bulb’s LED.

Configuration

See Configuring and building in the nRF Connect SDK documentation for information about how to permanently or temporarily change the configuration.

User interface

LED 0:

Blinks to indicate that the main application thread is running.

LED 1:

Indicates the dimmable light option, that is changes to the light bulb brightness. It can be controlled by another Zigbee device in the network, for example a light switch. Blinks when the light bulb is in Identify mode.

LED 2:

Turns on when the light bulb joins the network.

Button 3:

Depending on how long the button is pressed:

  • If pressed for less than five seconds, it starts or cancels the Identify mode.

  • If pressed for five seconds, it initiates the factory reset of the device. The length of the button press can be edited using the CONFIG_FACTORY_RESET_PRESS_TIME_SECONDS Kconfig option from Zigbee application utilities. Releasing the button within this time does not trigger the factory reset procedure.

Building and running

Make sure to configure the Zigbee stack before building and testing this sample. See Configuring Zigbee add-on for more information.

This sample can be found under samples/light_bulb in the Zigbee add-on folder structure.

To build the sample, follow the instructions in Building an application in the nRF Connect SDK documentation for your preferred building environment. See also Programming an application for programming steps and Testing and optimization for general information about testing and debugging in the nRF Connect SDK.

Note

When building repository applications in the Zigbee add-on which is an SDK repository, building with sysbuild is enabled by default. If you work with out-of-tree freestanding applications, you need to manually pass the --sysbuild parameter to every build command or configure west to always use it.

Testing

After programming the sample to your development kits, complete the following steps to test it:

  1. Turn on the development kit that runs the Network coordinator sample.

    When LED 2 turns on, this development kit has become the Coordinator of the Zigbee network and the network is established.

  2. Turn on the development kit that runs the Light bulb sample.

    When LED 2 turns on, the light bulb has become a Router inside the network.

    Note

    If LED 2 does not turn on, press Button 0 on the Coordinator to reopen the network.

  3. Turn on the development kit that runs the Light switch sample.

    When LED 2 turns on, the light switch has become an End Device, connected directly to the Coordinator.

  4. Wait until LED 3 on the development kit that runs the Light switch sample turns on.

    This LED indicates that the switch found a light bulb to control.

  5. Use the buttons on the development kit that runs the Zigbee: Light switch sample to control the light bulb.

    The result of using the buttons is reflected on the light bulb’s LED 1.

You can now use buttons on the light switch to control the light bulb, as described in the User interface section of the Light switch sample page.

Dependencies

This sample uses the following nRF Connect SDK libraries:

It uses the ZBOSS stack:

In addition, it uses the following Zephyr libraries: