Hello. I have to do the barometer with the Arduino uno for a geography project . I got the LPS25HB pressure sensor. But I can't make connections. SDO, CS and INT1 Which pin of Arduino uno?
This seems to be a 3V3 sensor so connecting it directly to an Arduino UNO by SPI might damage it. You need a level converter. If you might have other SPI devices on the bus the level converter must be enabled/disabled by the CS line.
Post a link to the product page for the sensor.
If you have this version from Pololu, it is safe to use with a 5V Arduino. Follow Pololu's directions for wiring it up and use their code.