Adafruit LPS33HW Water Resistant Pressure Sensor - STEMMA QT

Sometimes you need to sense pressure in a damp or caustic environment. And sometimes you need to know the relative changes in pressure as well as the absolute pressure. For the times you need to do both (or either), the LPS33HW is the pressure sensor for you.

VIN
Power input for the breakout; Adafruit states the onboard regulator accepts 3-5VDC and converts it to 3.3V for the sensor.
Type · powerVoltage · 3-5VDC input
3Vo
3.3V regulator output from the breakout; Adafruit states up to 100mA can be taken from this pin.
Type · powerVoltage · 3.3V output, up to 100mA
GND
Common ground for power and logic.
Type · groundVoltage · 0V
SCK
I2C clock pin; also the SPI clock input when using SPI.
Type · signalVoltage · Logic level follows VIN, 3-5V logic safe
SDI
I2C data pin; also SPI data in / MOSI for data sent from the processor to the LPS33/LPS35 sensor.
Type · signalVoltage · Logic level follows VIN, 3-5V logic safe

Start wiring

SPI · I2S · 3-5VDC input · 3.3V output, up to 100mA

Confirm the data interface matches your host board.

Module pins: VIN, 3Vo, GND, SCK, SDI, SDO, CS, INT. Schematik maps them to your board in the app.

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Pin	Type	Function	Voltage
VIN	power	Power input for the breakout; Adafruit states the onboard regulator accepts 3-5VDC and converts it to 3.3V for the sensor.	3-5VDC input
3Vo	power	3.3V regulator output from the breakout; Adafruit states up to 100mA can be taken from this pin.	3.3V output, up to 100mA
GND	ground	Common ground for power and logic.	0V
SCK	signal	I2C clock pin; also the SPI clock input when using SPI.	Logic level follows VIN, 3-5V logic safe
SDI	signal	I2C data pin; also SPI data in / MOSI for data sent from the processor to the LPS33/LPS35 sensor.	Logic level follows VIN, 3-5V logic safe
SDO	signal	SPI data out / MISO for data sent from the LPS33/LPS35 sensor to the processor; leave disconnected for I2C use.	Logic level follows VIN, 3-5V logic safe
CS	signal	SPI chip-select input; pull low to start an SPI transaction; leave disconnected for I2C use.	Logic level follows VIN, 3-5V logic safe
INT	signal	Interrupt output configurable for pressure threshold events; low-pressure threshold works in relative mode according to Adafruit.	Interrupt output level is the same as Vcc
STEMMA QT	connector	STEMMA QT / Qwiic I2C connector carrying the board I2C and power interface.	Same I2C/power interface as VIN/GND/SCK/SDI

Pinout

Start wiring

Air quality

Temp and humidity

Environment sensors

Light and colour