SHT3x_OLED.ino

/***************************************************
  This is an example for the SHT31-D Humidity & Temp Sensor

  Designed specifically to work with the SHT31-D sensor from Adafruit
  ----> https://www.adafruit.com/products/2857

  These sensors use I2C to communicate, 2 pins are required to
  interface
 ****************************************************/

#include <Arduino.h>
#include <Wire.h>
#include "Adafruit_SHT31.h"

#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

#define OLED_RESET     4 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

Adafruit_SHT31 sht31 = Adafruit_SHT31();

void setup() {

  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();
  display.display();

  while (!Serial)
    delay(10);     // will pause Zero, Leonardo, etc until serial console opens

  display.println("SHT31 test");
  if (! sht31.begin(0x44)) {   // Set to 0x45 for alternate i2c addr
    display.println("Couldn't find SHT31");
    while (1) delay(1);
  }
}


void loop() {
  display.clearDisplay();

  float t = sht31.readTemperature();
  float h = sht31.readHumidity();

  display.setTextColor(WHITE);
  display.setTextSize(2);
  display.setCursor(0, 1);

  if (! isnan(t)) {  // check if 'is not a number'
    display.println("Temp *C");
    display.print("     ");
    display.println(t);
  } else {
    display.println("Failed to read temperature");
  }

  if (! isnan(h)) {  // check if 'is not a number'
    display.println("Hum. %");
    display.print("     ");
    display.println(h);

  } else {
    display.println("Failed to read humidity");
  }
  display.display();
  delay(3000);
}