71 lines
1.3 KiB
C++
71 lines
1.3 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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#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, 100);
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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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uint32_t start, stop;
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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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// use simulation
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ACS.setADC(signal, 5, 1024);
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ACS.autoMidPoint();
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Serial.print("MidPoint: ");
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Serial.print(ACS.getMidPoint());
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Serial.print(". Noise mV: ");
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Serial.println(ACS.getNoisemV());
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}
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void loop()
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{
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delay(100);
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start = micros();
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// int mA = ACS.mA_AC();
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int mA = ACS.mA_AC_sampling();
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stop = micros();
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Serial.print("mA: ");
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Serial.print(mA);
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Serial.print(". Form factor: ");
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Serial.print(ACS.getFormFactor());
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Serial.print(" time: ");
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Serial.println(stop - start);
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delay(5000);
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}
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// simulated 50 Hz signal
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uint16_t signal(uint8_t p)
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{
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return 512 + 400 * sin((micros() % 1000000) * (TWO_PI * 50 / 1e6));
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}
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// -- END OF FILE --
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