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Weather Shield Example

By: Nathan Seidle

SparkFun Electronics

Date: June 10th, 2016

License: This code is public domain but you buy me a beer if

you use this and we meet someday (Beerware license).

This example prints the current humidity, air pressure, tempe

rature and light levels.

The weather shield is capable of a lot. Be sure to checkout t

he other more advanced examples for creating

your own weather station.

Updated by Joel Bartlett

03/02/2017

Removed HTU21D code and replaced with Si7021

#include <Wire.h> //I2C needed for sensors

#include "SparkFunMPL3115A2.h" //Pressure sensor Search "Spa

rkFun MPL3115" and install from Library Manager

#include "SparkFun_Si7021_Breakout_Library.h" //Humidity senso

r Search "SparkFun Si7021" and install from Library Manager

MPL3115A2 myPressure; //Create an instance of the pressure sen

sor

Weather myHumidity;//Create an instance of the humidity sensor

//Hardware pin definitions

//============================

const byte STAT_BLUE =7;

const byte STAT_GREEN =8;

const byte REFERENCE_3V3 = A3;

const byte LIGHT = A1;

const byte BATT = A2;

//Global Variables

//============================

long lastSecond; //The millis counter to see when a second rol

ls by

void setup()

{

Serial.begin(9600);

Serial.println("Weather Shield Example");

pinMode(STAT_BLUE, OUTPUT); //Status LED Blue

pinMode(STAT_GREEN, OUTPUT); //Status LED Green

pinMode(REFERENCE_3V3, INPUT);

pinMode(LIGHT, INPUT);

//Configure the pressure sensor

myPressure.begin(); // Get sensor online

myPressure.setModeBarometer(); // Measure pressure in Pascal

s from 20 to 110 kPa

myPressure.setOversampleRate(7); // Set Oversample to the re

commended 128

myPressure.enableEventFlags(); // Enable all three pressure

and temp event flags

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