.. zephyr:code-sample:: uart-stm32-single-wire
:name: STM32 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. Without adaptions this example runs on STM32F3 discovery
board. You need to establish a physical connection between pins PA2 (USART2_TX) and
PC10 (UART4_TX).
Add a `single_wire_uart_loopback` fixture to your board in the hardware map to allow
twister to verify this sample's output automatically.
Building and Running
********************
Build and flash as follows, replacing ``stm32f3_disco`` with your board:
.. zephyr-app-commands::
:zephyr-app: samples/boards/stm32/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
f6a4217a88