MicroPython HTU21DF Driver¶

htu21df¶

MicroPython HTU21D-F Temperature & Humidity driver

• Author(s): ktown, Jose D. Montoya

class micropython_htu21df.htu21df.HTU21DF(i2c, address: int = 0x40)[source]¶

Driver for the HTU21DF Sensor connected over I2C.

Parameters:¶

i2c : I2C¶

The I2C bus the HTU21DF is connected to.

address : int¶

The I2C device address. Defaults to 0x40

Raises:¶

RuntimeError – if the sensor is not found

Quickstart: Importing and using the device

Here is an example of using the HTU21DF class. First you will need to import the libraries to use the sensor

from machine import Pin, I2C
from micropython_htu21df import htu21df

Once this is done you can define your machine.I2C object and define your sensor object

i2c = I2C(1, sda=Pin(2), scl=Pin(3))
htu21df = htu21df.HTU21DF(i2c)

Now you have access to the attributes

temp = htu.temperature
rh = htu.humidity

property humidity : float¶

The measured relative humidity in percent.

reset() → None[source]¶

Perform a soft reset of the sensor, resetting all settings to their power-on defaults

property temp_rh_resolution : str¶

The temperature and relative humidity resolution

Have one of the following values: [1]

value	RH res %	T res C
0	0.04 (12bit)	0.01 (14bit)
1	0.7 (8bit)	0.04 (12bit)
2	0.17 (10bit)	0.02 (13bit)
3	0.08 (11bit)	0.08 (11bit)

property temperature : float¶

The measured temperature in Celsius.