#include <OneWire.h>
#include <DallasTemperature.h>
#include <TinyWireS.h>

#define ADDRESS 0x10

byte pointer = 0;
unsigned long last;

long temp = 0;
long pres = 0;
long bat = 0;

int samples = 0;

byte i2cdata[10];

OneWire oneWire(1);
DallasTemperature sensors(&oneWire);

void setup()
{
  TinyWireS.begin(ADDRESS);
  TinyWireS.onRequest(onRequest);
  analogReference(6);
  sensors.begin();
  sensors.setWaitForConversion(true);
  last = millis();
}

void loop()
{
  bat += analogRead(A3);
  pres += analogRead(A2);
  temp += (sensors.getTempCByIndex(0) * 10);
  samples++;
  sensors.requestTemperatures();
  delay(250);
}

void onRequest()
{
  if(millis() - last > 5000)
  {

    bat /= samples;
    pres /= samples;
    temp /= samples;

    int presi = pres;
    int bati = bat;
    int tempi = temp;

    i2cdata[0] = lowByte(bati);
    i2cdata[1] = highByte(bati);

    i2cdata[2] = lowByte(presi);
    i2cdata[3] = highByte(presi);

    i2cdata[4] = lowByte(tempi);
    i2cdata[5] = highByte(tempi);

    pres = 0;
    bat = 0;
    temp = 0;

    samples = 0;
    pointer = 1;
    TinyWireS.send(i2cdata[0]);
    last = millis();
  }
  else
  {
    TinyWireS.send(i2cdata[pointer]);
    pointer++;
    last = millis();
  }
}