Adafruit LPS35HW Water Resistant Pressure Sensor

Sometimes you need to sense pressure in a damp 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 LPS35HW is the pressure sensor for you.

VIN
Power input for the breakout; Adafruit Learn states the onboard regulator accepts 3-5 VDC and should be powered at the host logic level.
Type · powerVoltage · 3-5 VDC input, same as host logic level
3Vo
3.3 V regulator output from the breakout; Adafruit Learn states up to 100 mA may be drawn.
Type · powerVoltage · 3.3 V output, up to 100 mA
GND
Common ground for power and logic.
Type · groundVoltage · 0 V
SCK
I2C clock pin; also SPI clock input when using SPI. Adafruit Learn says breakout logic pins are level-shifted and safe at the VIN logic level.
Type · signalVoltage · logic level follows VIN, 3-5 V safe
SDI
I2C data pin; also SPI data input / microcontroller-out sensor-in when using SPI.
Type · signal

Start wiring

SPI · 3-5 VDC input, same as host logic level · 3.3 V output, up to 100 mA

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 Learn states the onboard regulator accepts 3-5 VDC and should be powered at the host logic level.	3-5 VDC input, same as host logic level
3Vo	power	3.3 V regulator output from the breakout; Adafruit Learn states up to 100 mA may be drawn.	3.3 V output, up to 100 mA
GND	ground	Common ground for power and logic.	0 V
SCK	signal	I2C clock pin; also SPI clock input when using SPI. Adafruit Learn says breakout logic pins are level-shifted and safe at the VIN logic level.	logic level follows VIN, 3-5 V safe
SDI	signal	I2C data pin; also SPI data input / microcontroller-out sensor-in when using SPI.	logic level follows VIN, 3-5 V safe
SDO	signal	SPI serial data output / microcontroller-in sensor-out. Leave disconnected for I2C use per Adafruit Learn.	logic level follows VIN, 3-5 V safe
CS	signal	SPI chip-select input; pull low to start an SPI transaction. Leave disconnected for I2C use per Adafruit Learn.	logic level follows VIN, 3-5 V safe
INT	signal	Interrupt output pin configurable for pressure threshold events; Adafruit Learn states the voltage level is the same as Vcc.	same as Vcc / VIN logic level

Pinout

Start wiring

Air quality

Temp and humidity

Environment sensors

Light and colour