//www.youtube.com/c/engineer2you
#include <Wire.h>
#include <Sodaq_SHT2x.h>  //for SHT21 sensor
//-------------------------------BME280
#include <Arduino.h>
//#include <BMx280I2C.h>
#define I2C_ADDRESS 0x76
BMx280I2C bmx280(I2C_ADDRESS); //create object I2C Address 0x76
//-------------------------------DHT22
#include <DHT.h>;
#define DHT_PIN 14           // Output of DHT22 to pin 14 Arduino
#define DHT_TYPE DHT22      // DHT22 (AM2302)
DHT dht(DHT_PIN, DHT_TYPE); // Initialize DHT sensor for Arduino 16MHz
int chk;
float hum;  //Stores humidity value
float temp; //Stores temperature value
//-------------------------------DHT22
void setup() {
  Wire.begin();
  Serial.begin(9600);
  dht.begin();  //DHT22
  //---------------------------------------------------------BMP280
  if (!bmx280.begin()) {
    Serial.println("begin() failed. check your BMx280 Interface and I2C Address.");
    while (1);
  }
  if (bmx280.isBME280())
    Serial.println("sensor is a BME280");
  else Serial.println("sensor is a BMP280");
  //reset sensor to default parameters.
  bmx280.resetToDefaults();
  //by default sensing is disabled and must be enabled by setting a non-zero
  //oversampling setting.
  //set an oversampling setting for pressure and temperature measurements.
  bmx280.writeOversamplingPressure(BMx280MI::OSRS_P_x16);
  bmx280.writeOversamplingTemperature(BMx280MI::OSRS_T_x16);
  //if sensor is a BME280, set an oversampling setting for humidity measurements.
  if (bmx280.isBME280())
    bmx280.writeOversamplingHumidity(BMx280MI::OSRS_H_x16);
  //---------------------------------------------------------BMP280
}

void loop() {
  //////////////BMP280
  if (!bmx280.measure()) {
    Serial.println("could not start measurement, is a measurement already running?");
    return;
  }
  //wait for the measurement to finish
  do {
    delay(100);
  } while (!bmx280.hasValue());
  if (bmx280.isBME280()) {
    double bme280_humid = map(bmx280.getHumidity(), 22.59, 67.99, 40, 75);
    Serial.print("--------------------BME280 Humidity: ");
    Serial.println(bme280_humid);
  }
  double bme280_temp = bmx280.getTemperature() + 2.5;
  Serial.print("BME280 Temp: ");
  Serial.println(bme280_temp);
  delay(1000);
  //////////////SHT21
  double sht21_humid = map(SHT2x.GetHumidity(), 30.67, 81.29, 40, 75);
  Serial.print("--------------------SHT21 Humidity: ");
  Serial.println(sht21_humid);
  double sht21_temp = SHT2x.GetTemperature() + 2.3;
  Serial.print("SHT21 Temp: ");
  Serial.println(sht21_temp);
  delay(1000);
  //////////////DHT22
  hum = dht.readHumidity();
  //hum = hum + 4.9;
  hum = map(hum, 20.6, 69.5, 40, 75);
  temp = dht.readTemperature();
  temp = temp + 2.8;
  Serial.print("--------------------DHT22 Humidity: ");
  Serial.println(hum);
  Serial.print("DHT22 Temp: ");
  Serial.println(temp);
  Serial.println("***");
  Serial.println("***");
  Serial.println("***");
  delay(10000);
}
double map(double x, double in_min, double in_max, double out_min, double out_max) {
  return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}