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libraries/ACS712/examples/ACS712_20_AC_DEMO/ACS712_20_AC_DEMO.ino

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+//
+//    FILE: ACS712_20_AC_DEMO.ino
+//  AUTHOR: Rob Tillaart
+// PURPOSE: demo to set the mVperAmpere and Form FActor.
+//     URL: https://github.com/RobTillaart/ACS712
+
+
+#include "ACS712.h"
+
+
+//  Arduino UNO has 5.0 volt with a max ADC value of 1023 steps
+//  ACS712 5A  uses 185 mV per A
+//  ACS712 20A uses 100 mV per A
+//  ACS712 30A uses  66 mV per A
+
+
+ACS712  ACS(A0, 5.0, 1023, 100);
+//  ESP 32 example (might requires resistors to step down the logic voltage)
+//  ACS712  ACS(25, 3.3, 4095, 185);
+
+
+void setup()
+{
+  Serial.begin(115200);
+  while (!Serial);
+  Serial.println(__FILE__);
+  Serial.print("ACS712_LIB_VERSION: ");
+  Serial.println(ACS712_LIB_VERSION);
+
+  ACS.autoMidPoint();
+}
+
+
+void loop()
+{
+  int mA = ACS.mA_AC();
+  Serial.println(mA);
+
+  if (Serial.available() > 0)
+  {
+    char c = Serial.read();
+
+    if (c == '*') ACS.setmVperAmp(ACS.getmVperAmp() + 1);
+    if (c == '/') ACS.setmVperAmp(ACS.getmVperAmp() - 1);
+    Serial.print("mVperAmp:\t");
+    Serial.println(ACS.getmVperAmp());
+
+    if (c == '+') ACS.setFormFactor(ACS.getFormFactor() * 1.05);
+    if (c == '-') ACS.setFormFactor(ACS.getFormFactor() / 1.05);
+    Serial.print("formFactor:\t");
+    Serial.println(ACS.getFormFactor());
+  }
+  delay(1000);
+}
+
+
+// -- END OF FILE --
+