.. zephyr:code-sample:: uart-stm32-single-wire
:name: Single-wire UART
:relevant-api: uart_interface
Use single-wire/half-duplex UART functionality of STM32 devices.
Overview
********
A simple application demonstrating how to use the single-wire/half-duplex
UART functionality of STM32 devices. The example runs on various STM32
boards with minimal adaptations.
Add a ``single_wire_uart_loopback`` fixture to your board in the hardware map to allow
twister to verify this sample's output automatically.
Hardware Setup
**************
You need to establish a physical connection between UART pins on the board.
Refer to the specific board overlay file for the exact pin connections.
Building and Running
********************
Build and flash as follows, replacing ``stm32f3_disco`` with your board:
.. zephyr-app-commands::
:zephyr-app: samples/boards/st/uart/single_wire
:board: stm32f3_disco
:goals: build flash
:compact:
After flashing the console output should not show any failure reports,
but the following message repeated every 2s:
.. code-block:: none
Received c
37d143e436