Hall áramérzékelő modul, WCS1800, AC-DC, 35A, 5V

DC Test Code:

// WCS1800 DC example on Arduino UNO
// Measures DC current from AOUT
// Connection
// VCC -> 5V
// GND -> GND
// AOUT -> A0
// DOUT optional -> D2

#include <Arduino.h>

const int PIN_AOUT = A0;
const int PIN_DOUT = 2;

const float VREF = 5.0;
const float K = 0.060;          // 60mV/A

float offsetV = 2.5;

float readVoltageA0() {
  int raw = analogRead(PIN_AOUT);
  return (raw * VREF) / 1023.0;
}

float calibrateOffset(int samples) {
  double sum = 0.0;
  for (int i = 0; i < samples; i++) {
    sum += readVoltageA0();
    delay(2);
  }
  return (float)(sum / samples);
}


float measureCurrentDC(int samples) {
  double sumI = 0.0;
  for (int i = 0; i < samples; i++) {
    float v = readVoltageA0();
    float iA = (v - offsetV) / K;
    sumI += iA;
    delay(2);
  }
  return (float)(sumI / samples);
}


void setup() {
  Serial.begin(115200);
  pinMode(PIN_DOUT, INPUT);

  delay(300);

  // Offset calibration at zero current

  offsetV = calibrateOffset(400);
  Serial.print("Offset V: ");
  Serial.println(offsetV, 4);
}

void loop() {
  // Average over multiple readings for stability
  float iDc = measureCurrentDC(200);

  int dout = digitalRead(PIN_DOUT);

  Serial.print("IDC: ");
  Serial.print(iDc, 2);
  Serial.print(" A  DOUT: ");
  Serial.println(dout);

  delay(500);
}

AC Test Code:

// WCS1800 AC example on Arduino UNO
// Measures Irms from AOUT
// Connection
// VCC -> 5V
// GND -> GND
// AOUT -> A0
// DOUT optional -> D2

#include <Arduino.h>
#include <math.h>

const int PIN_AOUT = A0;
const int PIN_DOUT = 2;

const float VREF = 5.0;
const float K = 0.060;          // 60mV/A
float offsetV = 2.5;

float readVoltageA0() {
  int raw = analogRead(PIN_AOUT);
  return (raw * VREF) / 1023.0;
}

float calibrateOffset(int samples) {
  double sum = 0.0;
  for (int i = 0; i < samples; i++) {
    sum += readVoltageA0();
    delay(2);
  }
  return (float)(sum / samples);
}

float measureIrms(unsigned long windowMs) {
  unsigned long t0 = millis();
  double sumSq = 0.0;
  unsigned long n = 0;

  while (millis() - t0 < windowMs) {
    float v = readVoltageA0();
    float dv = v - offsetV;
    float i = dv / K;

    sumSq += (double)i * (double)i;
    n++;

    delayMicroseconds(300);   // Increase or decrease depending on how fast you want to sample
  }

  if (n == 0) return 0.0;
  return (float)sqrt(sumSq / (double)n);
}

void setup() {
  Serial.begin(115200);
  pinMode(PIN_DOUT, INPUT);

  delay(300);

  // Offset calibration at zero current
  offsetV = calibrateOffset(400);

  Serial.print("Offset V: ");
  Serial.println(offsetV, 4);
}


void loop() {
  // 200ms captures multiple periods at 50Hz
  float irms = measureIrms(200);

  int dout = digitalRead(PIN_DOUT);

  Serial.print("Irms: ");
  Serial.print(irms, 2);
  Serial.print(" A  DOUT: ");
  Serial.println(dout);

  delay(500);
}