ILPS22QS

Arduino library to support the ILPS22QS absolute digital output barometer

API

This sensor uses I2C, SPI, or I3C to communicate. For I2C it is then required to create a TwoWire interface before accessing to the sensors:

TwoWire dev_i2c(I2C_SDA, I2C_SCL);  
dev_i2c.begin();

For SPI it is then required to create a SPI interface before accessing to the sensors:

SPIClass dev_spi(SPI_MOSI, SPI_MISO, SPI_SCK);  
dev_spi.begin();

An instance can be created and enabled when the I2C bus is used following the procedure below:

ILPS22QSSensor sensor(&dev_i2c);
sensor.begin();
sensor.Enable();

An instance can be created and enabled when the I3C bus is used with SETDASA:

ILPS22QSSensor sensor(&I3C, ILPS22QS_I3C_ADD);
I3C.begin(I3C_SDA, I3C_SCL, 1000000U);
I3C.resetDynamicAddresses();
I3C.assignDynamicAddress(sensor.getStaticAddress(), 0x30);
sensor.begin(0x30);
sensor.Enable();

An instance can be created and enabled when the I3C bus is used with ENTDAA (dynamic address discovery):

ILPS22QSSensor sensor(&I3C);
I3C.begin(I3C_SDA, I3C_SCL, 1000000U);
I3C.resetDynamicAddresses();
I3C.discover(devices, 8, &found);
// find dynAddr by matching ILPS22QS_I3C_PID in discovered devices
sensor.begin(dynAddr);
I3C.setClock(12500000);
sensor.Enable();

An instance can be created and enabled when the SPI bus is used following the procedure below:

ILPS22QSSensor sensor(&dev_spi, CS_PIN);
sensor.begin();
sensor.Enable();

The access to the sensor values is done as explained below:

Read pressure and temperature.

float pressure;
float temperature;
sensor.GetPressure(&pressure);  
sensor.GetTemperature(&temperature);

Examples

• ILPS22QS_DataLogTerminal_I2C: This application shows how to get pressure and temperature data over I2C.

• ILPS22QS_DataLogTerminal_I3C: This application shows how to get pressure and temperature data over I3C using SETDASA.

• ILPS22QS_DataLogTerminal_I3C_ENTDAA: This application shows how to discover and use ILPS22QS over I3C.

Documentation

You can find the source files at
https://github.com/stm32duino/ILPS22QS

The ILPS22QS datasheet is available at
https://www.st.com/content/st_com/en/products/mems-and-sensors/pressure-sensors/ilps22qs.html