Weather Monitor w/BME280

Parts:

• Arduino Nano

• SD 1306 OLED

• BME 280 weather sensor

• Breadboard

• Breadboard power supply

• 9V Battery and case

Wiring:

SD1306: 5V, GND, SDA, SCL

BME280: 3.3V, GND, SDA, SCL

Nano: 5V, GND A4-->SDA, A5---> SCL

#include <Wire.h>

#include <Adafruit_Sensor.h>

#include <Adafruit_BME280.h>

#include <Adafruit_GFX.h>

#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128 // OLED display width, in pixels

#define SCREEN_HEIGHT 64 // OLED display height, in pixels

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1); // Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)

Adafruit_BME280 bme; // I2C

void setup() {

 Serial.begin(9600);

// check for sensor

 if (!bme.begin(0x76)) {  // Try 0x76 or 0x77 depending on your sensor

 Serial.println("Could not find a valid BME280 sensor, check wiring!");

 while (1);

 }

delay(1500);

// check OLED display

if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3D for 128x64

Serial.println(F("SSD1306 allocation failed"));

for (;;);

 }

}

void loop() {

// print values to serial monitor

 Serial.print("Temperature= ");

 Serial.print(bme.readTemperature());

 Serial.print(" °C");

 Serial.println();

 Serial.print("Pressure= ");

 Serial.print(bme.readPressure() / 100.0F);

 Serial.print(" hPa");

 Serial.println();

 Serial.print("Humidity= ");

 Serial.print(bme.readHumidity());

 Serial.print(" %");

 Serial.println();

 Serial.println();

 delay(2000);

// print values to SD1306 OLED display

display.setTextSize(2);

display.setTextColor(WHITE);

display.setCursor(0, 20);

display.print("Humidity = " );

display.setCursor(0, 50);

display.println(bme.readHumidity());

display.display();

delay(2000);

display.clearDisplay();

display.setCursor(0,20);

display.print("Pressure = ");

display.setCursor(0,50);

display.print(bme.readPressure()/ 100.0F);

display.display();

delay(2000);

display.clearDisplay();

display.setCursor(0,20);

display.print("Temp = ");

display.setCursor(0,50);

display.println(bme.readTemperature());

display.display();

delay(2000);

display.clearDisplay();

}