ESP8266_BMP280.txt

/* PROGRAM TO DISPLAY AMBIENT TEMPERATURE, BAROMETRIC PRESSURE AND ALTIMETER */



/*  Include Header files supporting : I2C, Adafruit OLED driver and graphics, Adafruit BMP280 and sensor */
/*  I2C addresses:-  0.96” OLED with SSD1306 driver: 0x3C; BMP280:  0x76 */

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BMP280.h>

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
#define OLED_RESET LED_BUILTIN 
#define Sea_Level_Press_hPa (1013.25)

//char PRESSURE[4];
//char TEMPERATURE[4];

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire,OLED_RESET);
Adafruit_BMP280 bmp;

void setup() {
 Serial.begin(74880); // This baud rate displays properly the post RESET steps of ESP8266
 delay(100);
 
 if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
 Serial.println(F("SSD1306 allocation failed"));
 for(;;);
 }
 delay(2000);
 
 bool status = bmp.begin(0x76); 
 if (!status) {
 Serial.println("Could not find a valid BMP280 sensor, check wiring!");
 display.clearDisplay();
 display.setCursor(0,0);
 display.setTextSize(1);
 display.setTextColor(WHITE);
 display.println("ERROR");
 display.display(); 
 while (1);
 }
 delay(2000);
 display.clearDisplay();
 display.setTextColor(WHITE);
}

void loop() {
 //display.clearDisplay();
 // display temperature
 display.setTextSize(1);
 display.setCursor(0,0);
 display.print("Temperature: ");
 display.setTextSize(1);
 display.setCursor(0,10);
 display.print(String(bmp.readTemperature()));
 display.print(" ");
 display.setTextSize(1);
 display.cp437(true);
 display.write(167);
 display.setTextSize(1);
 display.print(" C");
 delay(1000);
 
 // display presssure
 display.setTextSize(1);
 display.setCursor(0, 20);
 display.print("Pressure: ");
 display.setTextSize(1);
 display.setCursor(0, 30);
 display.print(String(bmp.readPressure()/100.0F));
 display.print(" hPa"); 
 display.display();
 delay(1000);

 //display altitude
 display.setTextSize(1);
 display.setCursor(0, 40);
 display.print("Altiitude: ");
 display.setTextSize(1);
 display.setCursor(0, 50);
 display.print(String(bmp.readAltitude(Sea_Level_Press_hPa)));
 display.print(" m"); 
 display.display();
 delay(1000);

 display.clearDisplay();
}