//                                                                -------
  // ads.setGain(GAIN_TWOTHIRDS);  // 2/3x gain +/- 6.144V  1 bit = 0.1875mV (default)
  // ads.setGain(GAIN_ONE);        // 1x gain   +/- 4.096V  1 bit = 0.125mV
  // ads.setGain(GAIN_TWO);        // 2x gain   +/- 2.048V  1 bit = 0.0625mV
  // ads.setGain(GAIN_FOUR);       // 4x gain   +/- 1.024V  1 bit = 0.03125mV
  // ads.setGain(GAIN_EIGHT);      // 8x gain   +/- 0.512V  1 bit = 0.015625mV


const int size = 150;
const int voltNums = 4;
const int voltMeters[voltNums] = {0x48, 0x49, 0x4A, 0x4B}; // 0x48, 0x49, 0x4A, 0x4B
vReading adsArray[voltNums]; 
float multiplier = 0.0078125F;               // ADS1115  @ +/- 6.144V gain = 0.0078125mV/step   
unsigned long lastDataLoggerReading;
int DataLoggerReadIntervalMs = 50;  

void setupDataLogger(){
  lastDataLoggerReading = millis();
  for(int x = 0; x < voltNums; x++){
    adsArray[x].sensor.setGain(GAIN_SIXTEEN);
    adsArray[x].sensor.setDataRate(RATE_ADS1115_32SPS);
    adsArray[x].sensor.begin(voltMeters[x]);
    for (int y = 0; y < size - 1; y++){ 
      adsArray[x].readings1[y] = 0;
      adsArray[x].readings2[y] = 0;
    }
  }
  Serial.println("done DataLogger Init");
}


void updateDataLogger(){
//    Serial.print("     -------------------------------        ");
  for(int x = 0; x < (sizeof(voltMeters) / sizeof(voltMeters[0])); x++){
    adsArray[x].readings1[adsArray[x].readCnt] = adsArray[x].sensor.readADC_Differential_0_1() * multiplier; // read differential AIN0 - AIN1 
    adsArray[x].readings2[adsArray[x].readCnt] = adsArray[x].sensor.readADC_Differential_2_3() * multiplier; // read differential AIN2 - AIN3 

    float diff1 = (adsArray[x].sensor.readADC_SingleEnded(1) * multiplier) - (adsArray[x].sensor.readADC_SingleEnded(0) * multiplier);
    float diff2 = (adsArray[x].sensor.readADC_SingleEnded(3) * multiplier) - (adsArray[x].sensor.readADC_SingleEnded(2) * multiplier);
    
    // Serial.print(adsArray[x].readings1[adsArray[x].readCnt]); 
    // Serial.print("mV         Prong 1 Avr:  "); 
    // Serial.print(adsArray[x].avrProng1);
    // Serial.print(" N  "); Serial.print(adsArray[x].sensor.readADC_SingleEnded(0) * multiplier);
    // Serial.print(" P  "); Serial.println(adsArray[x].sensor.readADC_SingleEnded(1) * multiplier);
    // Serial.print(" Diff1  "); Serial.println(diff1);
    // Serial.print(adsArray[x].readings2[adsArray[x].readCnt]); Serial.print("mV         Prong 2 Avr:  "); Serial.print(adsArray[x].avrProng2);
    // Serial.print(" N  "); Serial.print(adsArray[x].sensor.readADC_SingleEnded(2) * multiplier);
    // Serial.print(" P  "); Serial.println(adsArray[x].sensor.readADC_SingleEnded(3) * multiplier);
    // Serial.print(" Diff2  "); Serial.println(diff2);
  
    // Get the average
    unsigned long totalreadings1 = 0;
    unsigned long totalreadings2 = 0;
    for (unsigned char cnt = 0; cnt < size; cnt++){
      totalreadings1 += adsArray[x].readings1[cnt];
      totalreadings2 += adsArray[x].readings2[cnt];
    }
    adsArray[x].avrProng1 = totalreadings1 / size;
    adsArray[x].avrProng2 = totalreadings2 / size;
    adsArray[x].readCnt = adsArray[x].readCnt == size - 1 ? 0 : adsArray[x].readCnt + 1;
  }
  Serial.println(); 
  // Serial.print("----------------------------------------------------------------------");Serial.println((int16_t)0); 
}

void DataLoggerControlLoop() { 
    unsigned long currentTime = millis();
    if(currentTime - lastDataLoggerReading >= DataLoggerReadIntervalMs){
        updateDataLogger(); 

        lastDataLoggerReading = currentTime; 
    }
}




float *getDataLoggerDump(float (& array)[8]){ 
  
  array[0] = adsArray[0].avrProng1;
  array[1] = adsArray[0].avrProng2;
  array[2] = adsArray[1].avrProng1;
  array[3] = adsArray[1].avrProng2;
  array[4] = adsArray[2].avrProng1;
  array[5] = adsArray[2].avrProng2; 
  array[6] = adsArray[3].avrProng1; 
  array[7] = adsArray[3].avrProng2; 
}