.. zephyr:code-sample:: zbus-confirmed-channel
:name: Confirmed channel
:relevant-api: zbus_apis
Use confirmed zbus channels to ensure all subscribers consume a message.
Overview
********
This sample implements a simple way of using confirmed channels in zbus.
The confirmed channel can only be published when all the subscribers consume the message.
Building and Running
********************
This project outputs to the console. It can be built and executed
on QEMU as follows:
.. zephyr-app-commands::
:zephyr-app: samples/subsys/zbus/confirmed_channel
:host-os: unix
:board: qemu_x86
:goals: run
Sample Output
=============
.. code-block:: console
I: From listener -> Confirmed message payload = 0
I: From bar_sub2 subscriber -> Confirmed message payload = 0
I: From bar_sub1 subscriber -> Confirmed message payload = 0
I: From bar_sub3 subscriber -> Confirmed message payload = 0
I: From listener -> Confirmed message payload = 1
I: From bar_sub2 subscriber -> Confirmed message payload = 1
I: From bar_sub1 subscriber -> Confirmed message payload = 1
I: From bar_sub3 subscriber -> Confirmed message payload = 1
I: From listener -> Confirmed message payload = 2
I: From bar_sub2 subscriber -> Confirmed message payload = 2
I: From bar_sub1 subscriber -> Confirmed message payload = 2
I: From bar_sub3 subscriber -> Confirmed message payload = 2
I: From listener -> Confirmed message payload = 3
I: From bar_sub2 subscriber -> Confirmed message payload = 3
I: From bar_sub1 subscriber -> Confirmed message payload = 3
I: From bar_sub3 subscriber -> Confirmed message payload = 3
<continues>
Exit QEMU by pressing :kbd:`CTRL+A` :kbd:`x`.
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