Kernel driver sht15 =================== Authors: * Wouter Horre * Jonathan Cameron * Vivien Didelot Supported chips: * Sensirion SHT10 Prefix: 'sht10' * Sensirion SHT11 Prefix: 'sht11' * Sensirion SHT15 Prefix: 'sht15' * Sensirion SHT71 Prefix: 'sht71' * Sensirion SHT75 Prefix: 'sht75' Datasheet: Publicly available at the Sensirion website http://www.sensirion.ch/en/pdf/product_information/Datasheet-humidity-sensor-SHT1x.pdf Description ----------- The SHT10, SHT11, SHT15, SHT71, and SHT75 are humidity and temperature sensors. The devices communicate using two GPIO lines. Supported resolutions for the measurements are 14 bits for temperature and 12 bits for humidity, or 12 bits for temperature and 8 bits for humidity. The humidity calibration coefficients are programmed into an OTP memory on the chip. These coefficients are used to internally calibrate the signals from the sensors. Disabling the reload of those coefficients allows saving 10ms for each measurement and decrease power consumption, while loosing on precision. Some options may be set directly in the sht15_platform_data structure or via sysfs attributes. Note: The regulator supply name is set to "vcc". Platform data ------------- * no_otp_reload: flag to indicate not to reload from OTP (default to false). * low_resolution: flag to indicate the temp/humidity resolution to use (default to false). Sysfs interface --------------- * temp1_input: temperature input * humidity1_input: humidity input * heater_enable: write 1 in this attribute to enable the on-chip heater, 0 to disable it. Be careful not to enable the heater for too long. * temp1_fault: if 1, this means that the voltage is low (below 2.47V) and measurement may be invalid. * humidity1_fault: same as temp1_fault.