Blynk ORP Sensor with NodeMCU & Ads1115 (water sensor)

Need Help With My Project
3

You are calling ReadANAlOGS() once per second, right?
If so, then how is this supposed to work? I’m an amateur, but don’t get those timings… (20ms sampling? how?)

static unsigned long orpTimer=millis();   //analog sampling interval
  static unsigned long printTime=millis();
  if(millis() >= orpTimer)
  {
    orpTimer=millis()+20;
    orpArray[orpArrayIndex++]= Voltage0 ;    //read an analog value every 20ms
    if (orpArrayIndex==ArrayLenth) {
      orpArrayIndex=0;
    }   
    orpValue=((30*(double)VOLTAGE*1000)-(75*avergearray(orpArray, ArrayLenth)*VOLTAGE*1000/1024))/75-OFFSET;   //convert the analog value to orp according the circuit
  }

Also, here:

  adc0 = ads.readADC_SingleEnded(0);
  adc1 = ads.readADC_SingleEnded(1);
  adc2 = ads.readADC_SingleEnded(2);
  adc3 = ads.readADC_SingleEnded(3);

I don’t know how library handles conversion time, but it is safe to wait a bit between subsequent readings from the same ADC