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i2cset — Set the value of a register of an I2C device. See also: `i2cdetect`, `i2cdump`, `i2cget`. Note: All

Submitted by: @import:tldr-pages·Mar 2, 2026·

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thecommandi2cseti2cvaluecliregisterset

linux

Problem

How to use the i2cset command: Set the value of a register of an I2C device. See also: i2cdetect, i2cdump, i2cget. Note: All addresses should be specified in hexadecimal. More information: <https://manned.org/i2cset>.

Solution

i2cset — Set the value of a register of an I2C device. See also: i2cdetect, i2cdump, i2cget. Note: All addresses should be specified in hexadecimal. More information: <https://manned.org/i2cset>.

Write to a register of an I2C device:

i2cset {{i2cbus}} {{device_address}} {{register_address}} {{value}}

Write to a register of an I2C device without asking for confirmation:

i2cset -y {{i2cbus}} {{device_address}} {{register_address}} {{value}}

Write to a register of an I2C device using a specific mode:

i2cset {{i2cbus}} {{device_address}} {{register_address}} {{value}} {{b|w|c|s|i}}

Code Snippets

Write to a register of an I2C device

i2cset {{i2cbus}} {{device_address}} {{register_address}} {{value}}

Write to a register of an I2C device without asking for confirmation

i2cset -y {{i2cbus}} {{device_address}} {{register_address}} {{value}}

Write to a register of an I2C device using a specific mode

i2cset {{i2cbus}} {{device_address}} {{register_address}} {{value}} {{b|w|c|s|i}}

Context

tldr-pages: linux/i2cset

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