README.rst
1.. _sht4x:
2
3SHT4X: High Accuracy Digital I2C Humidity Sensor
4#################################################
5
6Description
7***********
8
9This sample application periodically reads the ambient temperature and humidity
10from an SHT4X device. The result is written to the console.
11
12The SHT4X sensor has an optional heater that can be useful for specific
13environments or applications (refer to the datasheet for more information).
14To utilize the heater, check the Kconfig options for this application.
15
16References
17**********
18
19 - `SHT4X sensor <https://sensirion.com/products/catalog/SHT45>`_
20
21Wiring
22******
23
24This sample uses the SHT4X sensor controlled via the I2C interface.
25Connect Supply: **VDD**, **GND** and Interface: **SDA**, **SCL**.
26The supply voltage can be in the 1.7V to 3.6V range.
27Depending on the baseboard used, the **SDA** and **SCL** lines may require Pull-Up
28resistors.
29
30Building and Running
31********************
32
33This project outputs sensor data to the console. It requires an SHT4X
34sensor. It should work with any platform featuring an I2C peripheral
35interface. This example includes a device tree overlay
36for the :zephyr:board:`blackpill_f411ce` board.
37
38.. zephyr-app-commands::
39 :zephyr-app: samples/sensor/sht4x
40 :board: blackpill_f411ce
41 :goals: build flash
42
43Sample Output
44=============
45
46.. code-block:: console
47
48 *** Booting Zephyr OS build v2.6.0-rc1-315-g50d8d1187138 ***
49 SHT4X: 23.64 Temp. [C] ; 30.74 RH [%]
50 SHT4X: 23.66 Temp. [C] ; 32.16 RH [%]
51 SHT4X: 23.63 Temp. [C] ; 30.83 RH [%]
52
53The datasheet states that the sensor measures temperature and humidity in degrees Celsius
54and percent relative humidity respectively.
55