HTS221 Humidity Sensor

Measure relative humidity and temperature from HTS221 sensor

Since R2025a

Add-On Required: This feature requires the Embedded Coder Support Package for STMicroelectronics STM32 Processors add-on.

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Libraries:
Embedded Coder Support Package for STMicroelectronics STM32 Processors / STM32L475VG-Discovery (B-L475E-IOT01A)
Embedded Coder Support Package for STMicroelectronics STM32 Processors / Sensors / Environmental Sensors
Simulink Coder Support Package for STMicroelectronics Nucleo Boards / Sensors
Simulink Support Package for Arduino Hardware / Sensors

Description

The HTS221 Humidity Sensor block measures relative humidity and ambient temperature using the HTS221 humidity sensor interfaced with the STM32 Processors. This sensor comprises of a sensing element to measure the relative humidity and temperature.

You can also select an output data rate for the measured values in the block.

Ports

Output

Humidity — Relative humidity as measured by HTS221 sensor

scalar

The block outputs the relative humidity in percentage (%).

Dependencies

This output port appears only if you select the Humidity (%) parameter.

Data Types: double

Temperature — Temperature measured by HTS221 sensor

scalar

Temperature (in ℃) measured by HTS221 sensor connected to STM32 Processors.

Dependencies

This output port appears only if you select the Temperature (℃) parameter.

Data Types: double

Status — Status of pressure and temperature measurements

0 | 1 | -1

Status of pressure and temperature measurements, specified as a 1-by-2 vector. 0 indicates that the data read is new, 1 indicates that the data read is not new, and -1 indicates that the corresponding output is not selected.

Dependencies

This output port appears only if you select the Status parameter.

Data Types: int8

Parameters

I2C module — I2C communication module

0 (default) | scalar

Specify the I2C module on the STM32 Processors to communicate with sensor peripherals.

I2C address — Peripheral address to communicate with sensor

0x5F (default) | scalar

The peripheral address for the HTS221 sensor to communicate with the STM32 Processors.

Humidity (%) — Set output port for reading humidity

on (default) | off

Select this parameter to set Humidity as one of the output ports.

Temperature (℃) — Set output port for reading temperature

on (default) | off

Select this parameter to set Temperature as one of the output ports.

Status — Set output port for obtaining status

off (default) | on

Select this parameter to set Status as one of the output ports.

Output data rate (ODR) — Rate at which humidity and temperature data is sampled

1 Hz (default) | 7 Hz | 12.5 Hz

Select the output data rate at which humidity data is sampled.

Sample time — Time interval to read data

-1 (default) | positive integer

Specify how often this block reads the data from the HTS221 sensor. When you set this parameter to -1, Simulink determines the best sample time for the block based on the block context within the model.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Version History

Introduced in R2025a