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libraries/ACS712/examples/ACS712_20_DC/ACS712_20_DC.ino

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+//
+//    FILE: ACS712_20_DC.ino
+//  AUTHOR: Rob Tillaart
+// PURPOSE: demo to measure mA DC
+//     URL: https://github.com/RobTillaart/ACS712
+
+//  use with Arduino Serial Plotter
+
+#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();
+  //  Serial.println(ACS.getMidPoint());
+}
+
+
+void loop()
+{
+  int mA = ACS.mA_DC();
+  Serial.println(mA);
+  delay(100);
+}
+
+
+// -- END OF FILE --