.. zephyr:code-sample:: uart-passthrough
:name: UART Passthrough
:relevant-api: uart_interface
Pass data directly between the console and another UART interface.
Overview
********
This sample will virtually connect two UART interfaces together, as if Zephyr
and the processor were not present. Data read from the console is transmitted
to the "*other*" interface, and data read from the "*other*" interface is
relayed to the console.
The source code for this sample application can be found at:
:zephyr_file:`samples/drivers/uart/passthrough`.
Requirements
************
#. One UART interface, identified as Zephyr's console.
#. A second UART connected to something interesting (e.g: GPS), identified as
the chosen ``uart,passthrough`` device - the pins and baudrate will need to
be configured correctly.
Building and Running
********************
Build and flash the sample as follows, changing ``nucleo_l476rg`` for your
board:
.. zephyr-app-commands::
:zephyr-app: samples/drivers/uart/passthrough
:board: nucleo_l476rg
:goals: build flash
:compact:
Sample Output
=============
.. code-block:: console
*** Booting Zephyr OS build zephyr-v3.5.0-2988-gb84bab36b941 ***
Console Device: 0x8003940
Other Device: 0x800392c
$GNGSA,A,3,31,29,25,26,,,,,,,,,11.15,10.66,3.29,1*06
$GNGSA,A,3,,,,,,,,,,,,,11.15,10.66,3.29,2*0F
$GNGSA,A,3,,,,,,,,,,,,,11.15,10.66,3.29,3*0E
$GNGSA,A,3,,,,,,,,,,,,,11.15,10.66,3.29,4*09
$GNGSA,A,3,,,,,,,,,,,,,11.15,10.66,3.29,5*08
cf14d4f1fd