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LPS28DFW arduino

Associate III


Actually i'm trying to mesure the pressure using LPS28DFW and arduino uno, but i have some problems, the i2c communication does not working.

Can help me please and thank you.

arduino code : 

#include <Wire.h>
#include "SparkFun_LPS28DFW_Arduino_Library.h"

// Create a new sensor object
LPS28DFW pressureSensor;

// I2C address selection
uint8_t i2cAddress = LPS28DFW_I2C_ADDRESS_DEFAULT; // 0x5C
//uint8_t i2cAddress = LPS28DFW_I2C_ADDRESS_SECONDARY; // 0x5D

void setup()
    // Start serial
    Serial.println("LPS28DFW Example 1 - Basic Readings!");

    // Initialize the I2C library

    // Check if sensor is connected and initialize
    // Address is optional (defaults to 0x5C)
    while(pressureSensor.begin(i2cAddress) != LPS28DFW_OK)
        // Not connected, inform user
        Serial.println("Error: LPS28DFW not connected, check wiring and I2C address!");

        // Wait a bit to see if connection is established

    Serial.println("LPS28DFW connected!");

void loop()
    // Get measurements from the sensor. This must be called before accessing
    // the pressure data, otherwise it will never update

    // Print temperature and pressure
    Serial.print("Temperature (C): ");
    Serial.print("Pressure (hPa): ");

    // Only print every second
Federica Bossi
ST Employee

Hi @ljm ,

Two suggestions: the CS must be high when you are in I2C, in addition you can check if the SDO pin matches the address set.

Hope this helps

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I have a question.
For the LPS22DF, in fact I do shock tests, and I compare the measurement of the sensor with a reference, in a certain number of shocks I saw that the difference was 20 mbar but when I continue the test with more shocks I saw that the difference was decreased to 13 mbar, is it the membrane that has moved? or another mechanical phenomenon that has passed?

I'm applying tests of 10,000 and 20,000 shocks (between 200 and 300 g each).
Yes, I'm measuring the temperature (between 19°C and 24°C).

i'm using 10 simples, 

only the sample number 8 has this deviation from 13 mbar of difference to 20 mbar and by continuing to test, it was back to 13mbar of difference.

the rest of samples are all the sample difference of measurements