//#include <Wire.h>

//TwoWire myWire1 (1, I2C_FAST_MODE); // to use the I2C 1
//TwoWire myWire2 (2, I2C_FAST_MODE); // to use the I2C 2


#include <Wire_slave.h>

#include <Adafruit_Sensor.h>
#include "Adafruit_BME680.h"
#define SEALEVELPRESSURE_HPA (1013.25)

Adafruit_BME680 bme; // I2C



void setup()
{

  Serial.begin(115200);
  delay(2000);



  Wire.begin();
  delay(10);
  Wire1.begin(8);
  Wire1.onRequest(requestEvent); // register event
  Wire1.onReceive(receiveEvent); // register event
  delay(10);


  Serial.print("init BME280...");

  if (!bme.begin(0x76))
  {
    Serial.println("Could not find a valid BME680 sensor, check wiring!");
    //while (1);
  }
  else
  {
    Serial.println("begin init ok!");
  }



  Serial.println("Could  wiring2!");

  // Set up oversampling and filter initialization
  bme.setTemperatureOversampling(BME680_OS_8X);
  bme.setHumidityOversampling(BME680_OS_2X);
  bme.setPressureOversampling(BME680_OS_4X);
  bme.setIIRFilterSize(BME680_FILTER_SIZE_3);
  bme.setGasHeater(320, 150); // 320*C for 150 ms
}


void loop()
{

  if (! bme.performReading()) {
    Serial.println("Failed to perform reading :(");
    return;
  }
  Serial.print("Temperature = ");
  Serial.print(bme.temperature);
  Serial.println(" *C");

  Serial.print("Pressure = ");
  Serial.print(bme.pressure / 100.0);
  Serial.println(" hPa");

  Serial.print("Humidity = ");
  Serial.print(bme.humidity);
  Serial.println(" %");

  Serial.print("Gas = ");
  Serial.print(bme.gas_resistance / 1000.0);
  Serial.println(" KOhms");

  Serial.print("Approx. Altitude = ");
  Serial.print(bme.readAltitude(SEALEVELPRESSURE_HPA));
  Serial.println(" m");

  Serial.println();
  delay(2000);
}

//------------------------------------
void requestEvent()
{
  Wire.write("hello "); // respond with message of 6 bytes
                        // as expected by master
}

void receiveEvent(int howMany){
  while(1 < Wire.available()){ // loop through all but the last
    char c = Wire.read(); // receive byte as a character
    Serial.print(c);         // print the character
  }
  int x = Wire.read();    // receive byte as an integer
  Serial.println(x);         // print the integer
}