Hiker's Friend

/*
 * Hiker's Friend
 *
 * learnelectronics
 * 16 Sept 2017
 *
 * www.youtube.com/c/learnelectronics
 * [email protected]
 *
 * Note: I2C pins on the D1 Mini are: SDA D@, SCK D1
 */

#include <Wire.h>                                                             //I2C library
#include <Adafruit_SSD1306.h>                                                 //OLED driver
#include <Adafruit_Sensor.h>                                                  //Sensor library
#include <Adafruit_BMP280.h>                                                  //BMP280 driver





Adafruit_SSD1306 display(LED_BUILTIN);                                        //create instance of SSD1306 called display
Adafruit_BMP280 bme;                                                          //create instance of BMP280 called bme



void setup()   {

  Serial.begin(9600);                                                         //serial begin for debugging
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);                                  //start OLED @ hex addy 0X3C
  display.display();                                                          //show Adafruit logo
  delay(2000);                                                                //wait 2 sec
  display.clearDisplay();                                                     //clear display & buffer

  if (!bme.begin()) {                                                         //if bme does not start show error
    Serial.println("Could not find a valid BMP280 sensor, check wiring!");
    while (1);
  }

}


void loop() {

  float temp = ((bme.readTemperature()*1.8)+32);                              //get temp and convert from C to F
  float pres = (bme.readPressure()*0.0002953);                                //get pressure and convert from Pa to inHg
  float alti = (bme.readAltitude(1013.25)*3.28084);                           //get altitude and convert from M to feet

  display.clearDisplay();                                                     //clear display & buffer
  display.setTextSize(1);                                                     //set text size to 1
  display.setTextColor(WHITE);                                                //set color to white
  display.setCursor(0,0);                                                     //start in upper left
  display.print("Temp:     ");                                                //print heading to buffer
  display.print(temp,2);                                                      //print value to buffer w/ 2 dec places
  display.println("F");                                                       //print units to buffer and drop down 1 line

  display.print("Pressure: ");
  display.print(pres,2);
  display.println("in");

  display.print("Altitude: ");
  display.print(alti,2);
  display.println("Ft");

  display.display();                                                          //show the buffer
  delay(2000);                                                                //wait 2 seconds
}