Kernel driver sht4x

Supported Chips:

• Sensirion SHT4X

  Prefix: ‘sht4x’

  Addresses scanned: None

  Datasheet:

  English: https://www.sensirion.com/fileadmin/user_upload/customers/sensirion/Dokumente/2_Humidity_Sensors/Datasheets/Sensirion_Humidity_Sensors_SHT4x_Datasheet.pdf

Author: Navin Sankar Velliangiri <navin@linumiz.com>

Description

This driver implements support for the Sensirion SHT4x chip, a humidity and temperature sensor. Temperature is measured in degree celsius, relative humidity is expressed as a percentage. In sysfs interface, all values are scaled by 1000, i.e. the value for 31.5 degrees celsius is 31500.

Usage Notes

The device communicates with the I2C protocol. Sensors can have the I2C address 0x44. See How to instantiate I2C devices for methods to instantiate the device.

Sysfs entries

temp1_input	Measured temperature in millidegrees Celsius
humidity1_input	Measured humidity in %H
update_interval	The minimum interval for polling the sensor, in milliseconds. Writable. Must be at least 2000.
heater_power	The requested heater power, in milliwatts. Available values: 20, 110, 200 (default: 200).
heater_time	The requested operating time of the heater, in milliseconds. Available values: 100, 1000 (default 1000).
heater_enable	Enable the heater with the selected power and for the selected time in order to remove condensed water from the sensor surface. The heater cannot be manually turned off once enabled (it will automatically turn off after completing its operation). 0: turned off (read-only value) 1: turn on