1.. zephyr:code-sample:: uart
2   :name: UART echo
3   :relevant-api: uart_interface
4
5   Read data from the console and echo it back.
6
7Overview
8********
9
10This sample demonstrates how to use the UART serial driver with a simple
11echo bot. It reads data from the console and echoes the characters back after
12an end of line (return key) is received.
13
14The polling API is used for sending data and the interrupt-driven API
15for receiving, so that in theory the thread could do something else
16while waiting for incoming data.
17
18By default, the UART peripheral that is normally used for the Zephyr shell
19is used, so that almost every board should be supported.
20
21Building and Running
22********************
23
24Build and flash the sample as follows, changing ``nrf52840dk/nrf52840`` for
25your board:
26
27.. zephyr-app-commands::
28   :zephyr-app: samples/drivers/uart/echo_bot
29   :board: nrf52840dk/nrf52840
30   :goals: build flash
31   :compact:
32
33Sample Output
34=============
35
36.. code-block:: console
37
38    Hello! I\'m your echo bot.
39    Tell me something and press enter:
40    # Type e.g. "Hi there!" and hit enter!
41    Echo: Hi there!
42