Ac Strom Messen mit ADS1115 in beide Richtungen

#include <Arduino.h>

#include <Wire.h>

#include <Adafruit_ADS1X15.h>

#include <SPI.h>

Adafruit_ADS1115 ads;

const float FACTOR = 5; //5A/1V from teh CT

const float multiplier = 0.00005;

float getcurrent()

{

  float voltage;

  float current;

  float sum = 0;

  long time_check = millis();

  int counter = 0;

  while (millis() - time_check < 1000)

  {

    voltage = ads.readADC_Differential_0_1() * multiplier;

    current = voltage * FACTOR;

    //current /= 1000.0;

    sum += sq(current);

    counter = counter + 1;

  }

  current = sqrt(sum / counter);

  return (current);

}

void setup() {

  Serial.begin(9600);

  ads.setGain(GAIN_FOUR);      // +/- 1.024V 1bit = 0.5mV

  ads.begin();

}

void printMeasure(String prefix, float value, String postfix)

{

  Serial.print(prefix);

  Serial.print(value, 3);

  Serial.println(postfix);

}

void loop() {

  float currentRMS = getcurrent();

  printMeasure("Irms: ", currentRMS, "A");

  delay(1000);

}