91 lines
1.7 KiB
C++
91 lines
1.7 KiB
C++
//
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// FILE: ACS712_20_AC.ino
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// AUTHOR: Rob Tillaart
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// PURPOSE: demo AC measurement with point to point
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// URL: https://github.com/RobTillaart/ACS712
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///////////////////////////////////////////////////////////////////
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//
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// DISPLAY
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//
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#include <Wire.h>
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#include <LCD.h>
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#include <LiquidCrystal_I2C.h>
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#define BACKLIGHT_PIN 3
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#define En_pin 2
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#define Rw_pin 1
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#define Rs_pin 0
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#define D4_pin 4
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#define D5_pin 5
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#define D6_pin 6
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#define D7_pin 7
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#define BL_OFF 0
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#define BL_ON 1
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#define DISPLAY_ADDR 0x3F // check
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LiquidCrystal_I2C lcd(DISPLAY_ADDR, En_pin, Rw_pin, Rs_pin, D4_pin, D5_pin, D6_pin, D7_pin);
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uint32_t lastDisplay = 0;
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#include "ACS712.h"
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// Arduino UNO has 5.0 volt with a max ADC value of 1023 steps
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// ACS712 5A uses 185 mV per A
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// ACS712 20A uses 100 mV per A
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// ACS712 30A uses 66 mV per A
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ACS712 ACS(A0, 5.0, 1023, 185);
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// ESP 32 example (might requires resistors to step down the logic voltage)
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// ACS712 ACS(25, 3.3, 4095, 185);
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void setup()
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{
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Serial.begin(115200);
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while (!Serial);
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Serial.println(__FILE__);
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Serial.print("ACS712_LIB_VERSION: ");
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Serial.println(ACS712_LIB_VERSION);
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lcd.begin(16, 2);
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lcd.setBacklightPin(BACKLIGHT_PIN, POSITIVE);
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lcd.setBacklight(BL_ON);
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lcd.clear();
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ACS.autoMidPoint();
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}
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void loop()
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{
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lcd.clear();
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float f1 = ACS.mA_AC();
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float f2 = ACS.mA_AC_sampling();
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lcd.setCursor(0, 0);
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lcd.print("mA: ");
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lcd.print(f1, 1);
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lcd.setCursor(10, 0);
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lcd.print(f2, 1);
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lcd.setCursor(0, 1);
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lcd.print("FF: ");
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lcd.print(f1 / f2);
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delay(1000);
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}
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// -- END OF FILE --
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