Generic C driver for the HTU41 sensor
The HTU41 is a Relative Humidity (RH) and Temperature sensor, providing a digital I²C output, designed, calibrated and checked to meet todays and future needs of a wide range of applications including Transportation, Medical, Industrial and Commercial. Relying on a proprietary patented technology, it enables measurements from ambient conditions to harsh environments with high moisture levels. Its compact 4-Pin Dual-Flat-No-Leads (DFN 1,5x1,5mm) package compatible with surface mount technology, high-power heater and ESD robustness provides RH output long term stability, best in class response time and high power heater for harsh environments. The sensor can operate from 3.3V to 5.5V, has selectable resolution, internal diagnostics and checksum capability. The HTU41 has a low current stand-by mode for power-sensitive applications.
- Measures relative humidity from 0% to 100%
- Measures temperature from -40°C to 125°C
- Humidity resolution selectable from 0.007% to 0.025%
- Temperature resolution selectable from 0.012°C to 0.040°C
- 0.05 µA sleep current
- 1.04 µA Typical Application (One measurement per second OSR0)
- 450 µA operating current (during measurement only)
- Typical accuracy +-2%RH and +-0.2°C
- HTU41 Reset request
- Aquisition resolution management
- Built-in heater management
- Read HTU41 Serial Number
- Read HTU41 diagnostics
- Read both or one of Temperature and Humidity measurement
- Calculate Dew Point
NB: This driver is intended to provide an implementation example of the sensor communication protocol, in order to be usable you have to implement a proper I2C layer for your target platform.