---
name: "iio_attr"
section: "1"
platform: "linux"
package: "libiio"
version: "0.26-5"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/iio_attr"
---

# iio\_attr(1)

list IIO devices, and read/write device attributes

## NAME

iio\_attr - list IIO devices, and read/write device attributes

## SYNOPSIS

**iio\_attr** \[ *options* \] -d \[device\] \[attr\] \[value\]\
 **iio\_attr** \[ *options* \] -c \[device\] \[channel\] \[attr\] \[value\]\
 **iio\_attr** \[ *options* \] -D \[device\] \[attr\] \[value\]\
 **iio\_attr** \[ *options* \] -C \[attr\]\
 **iio\_attr** -S \<arg\>\
 **iio\_attr** -h

## DESCRIPTION

**iio\_attr** is a utility for displaying information about local or remote IIO devices. By providing an optional value, **iio\_attr** will attempt to write the new value to the attribute.

## COMMANDS

- The iio\_attr utility has a few main options, which control what the main utility of the application is.

  - **-d, --device-attr**

  Read and Write IIO device attributes

- **-c --channel-attr**

  Read and Write IIO channel attributes

- **-B --buffer-attr**

  Read and Write IIO Buffer attributes

- **-C --context-attr**

  Read and Write IIO Context attributes

- **-D --debug-attr**

  Read and Write IIO Debug attributes

- **-h, --help**

  Tells *iio\_attr* to display some help, and then quit.

- **-V, --version**

  Prints the version information for this particular copy of *iio\_attr* and the version of the libiio library it is using. This is useful for knowing if the version of the library and *iio\_attr* on your system are up to date. This is also useful when reporting bugs.

- **-S, --scan \[backends\]**

  Scan for available IIO contexts, optional arg of specific backend(s) 'ip', 'usb' or 'ip:usb'. Specific options for USB include Vendor ID, Product ID to limit scanning to specific devices 'usb=0456,b673'. vid,pid are hexadecimal numbers (no prefix needed), "\*" (match any for pid only) If no argument is given, it checks all that are available.

## OPTIONS

- **-u, --uri**

  The Uniform Resource Identifier *(uri)* for connecting to devices, can be one of:

  - ip:\[address\]

    network address, either numeric (192.168.0.1) or network hostname

  - ip:

    blank, if compiled with zeroconf support, will find an IIO device on network

  - usb:\[device:port:instance\]

    normally returned from **iio\_attr -S**

  - serial:\[port\],\[baud\],\[settings\]

    which are controlled, and need to match the iiod (or tinyiiod) on the other end of the serial port.

    - \[port\]

      is something like '/dev/ttyUSB0' on Linux, and 'COM4' on Windows.

    - \[baud\]

      is is normally one of 110, 300, 600, 1200, 2400, 4800, 9600, 14400, 19200, 38400, 57600, 115200 \[default\], 128000 or 256000, but can vary system to system.

    - \[settings\]

      would normally be configured as '8n1' this is controlled by:

      - data\_bits:

        (5, 6, 7, 8 \[default\], or 9)

      - parity\_bits:

        ('n' none \[default\], 'o' odd, 'e' even, 'm' mark, or 's' space)

      - stop\_bits:

        (1 \[default, or 2)

      - flow\_control:

        ('0' none \[default\], 'x' Xon Xoff, 'r' RTSCTS, or 'd' DTRDSR)

  - local:

    with no address part.

- **-i, --input-channel**

  Filters channels by input channels only

- **-o, --output-channel**

  Filters channels by output channels only

- **-s, --scan-channel**

  Filters channels by scan channels only

- **-I, --ignore-case**

  When pattern matching devices, channels or attributes, ignore case

- **-g, --generate-code \<arg\>**

  Generate small C or python snippets that emulate what you are doing on the command line. Argument is a file name 'foo.c' or 'foo.py'

- If the specified device is not found, a non-zero exit code is returned.

  ## RETURN VALUE

## SEE ALSO

[**iio\_attr**(1)](/iio_attr/1.md), [**iio\_info**(1)](/iio_info/1.md), [**iio\_readdev**(1)](/iio_readdev/1.md), [**iio\_reg**(1)](/iio_reg/1.md), [**iio\_writedev**(1)](/iio_writedev/1.md), [**libiio**(3)](/libiio/3.md)

libiio home page: **https://wiki.analog.com/resources/tools-software/linux-software/libiio**

libiio code: **https://github.com/analogdevicesinc/libiio**

Doxygen for libiio **https://analogdevicesinc.github.io/libiio/**

## BUGS

All bugs are tracked at: **https://github.com/analogdevicesinc/libiio/issues**