I2C Wiring

Use this wiring if you want to connect via I2C interface

By default, the I2C address is 0x77.  If you add a jumper from DDO to GND the address will change to 0x76

  •  Connect board VIN (red wire) to Arduino 5V if you are running a 5V board Arduino (Uno, etc.). If your board is 3V, connect to that instead.
  • Connect board GND (black wire) to Arduino GND
  • Connect board SCL (yellow wire) to Arduino SCL
  • Connect board SDA (blue wire) to Arduino SDA

The final results should resemble the illustration above, showing an Adafruit Metro development board.

SPI Wiring

Since this is a SPI-capable sensor, we can use hardware or 'software' SPI. To make wiring identical on all microcontrollers, we'll begin with 'software' SPI. The following pins should be used:

  • Connect Vin to the power supply, 3V or 5V is fine. Use the same voltage that the microcontroller logic is based off of
  • Connect GND to common power/data ground
  • Connect the SCK pin to Digital #13 but any pin can be used later
  • Connect the SDO pin to Digital #12 but any pin can be used later
  • Connect the SDI pin to Digital #11 but any pin can be used later
  • Connect the CS pin Digital #10 but any pin can be used later

Later on, once we get it working, we can adjust the library to use hardware SPI if you desire, or change the pins to others.

Library Installation

You can install the Adafruit DPS310 Library for Arduino using the Library Manager in the Arduino IDE.

Click the Manage Libraries ... menu item, search for Adafruit DPS310 and select the Adafruit DPS310 library:

Then follow the same process for the Adafruit BusIO library.

Finally follow the same process for the Adafruit Unified Sensor library:

Load Example

Open up File -> Examples -> Adafruit DPS310 -> dps310_simpletest and upload to your Arduino wired up to the sensor.

Depending on whether you are using I2C or SPI, change the pin names and comment or uncomment the following lines.

Download: file
if (! dps.begin_I2C()) {             // Can pass in I2C address here
  //if (! dps.begin_SPI(DPS310_CS)) {  // If you want to use SPI

Once you upload the code and open the Serial Monitor (Tools->Serial Monitor) at 115200 baud, you will see the current configuration printed, followed by the pressure, and temperature measurements. You should see something similar to this:

Carefully pressing on the small port on the top of the sensor will change the pressure and temperature readings. Give it a try and see how it works!

Example Code

// This example shows how to read temperature/pressure

#include <Adafruit_DPS310.h>

Adafruit_DPS310 dps;

// Can also use SPI!
#define DPS310_CS 10

void setup() {
  Serial.begin(115200);
  while (!Serial) delay(10);

  Serial.println("DPS310");
  if (! dps.begin_I2C()) {             // Can pass in I2C address here
  //if (! dps.begin_SPI(DPS310_CS)) {  // If you want to use SPI
    Serial.println("Failed to find DPS");
    while (1) yield();
  }
  Serial.println("DPS OK!");

  dps.configurePressure(DPS310_64HZ, DPS310_64SAMPLES);
  dps.configureTemperature(DPS310_64HZ, DPS310_64SAMPLES);
}

void loop() {
  sensors_event_t temp_event, pressure_event;
  
  while (!dps.temperatureAvailable() || !dps.pressureAvailable()) {
    return; // wait until there's something to read
  }

  dps.getEvents(&temp_event, &pressure_event);
  Serial.print(F("Temperature = "));
  Serial.print(temp_event.temperature);
  Serial.println(" *C");

  Serial.print(F("Pressure = "));
  Serial.print(pressure_event.pressure);
  Serial.println(" hPa"); 

  Serial.println();
}

This guide was first published on Feb 03, 2020. It was last updated on Feb 03, 2020.

This page (Arduino) was last updated on Nov 06, 2020.