SEN0211 Datasheet SEN0211 | P4-P6



SampleCode

/***************************************************

This example reads Analog AC Current Sensor.

Created 2016-3-10

By berinie Chen <bernie.chen@dfrobot.com>

GNU Lesser General Public License.

See <http://www.gnu.org/licenses/> for details.

All above must be included in any redistribution

****************************************************/

/***********Notice and Troubleshooting***************

1.Connection and Diagram can be found here http://wiki.dfrobot.com.cn/index

.php?title=%EF%BC%88SKU:SEN0211%EF%BC%89%E6%A8%A1%E6%8B%9F%E9%87%8F%E4%BA%A4%

E6%B5%81%E7%94%B5%E6%B5%81%E4%BC%A0%E6%84%9F%E5%99%A8#.E6.A0.B7.E4.BE.8B.E4.B

B.A3.E7.A0.81

2.This code is tested on Arduino Uno.

****************************************************/

float Vref = 0;

const int ACPin = A2; //set arduino signal read pin

#define ACTectionRange 20; //set Non-invasive AC Current Sensor tection ra

nge (20A,30A,50A,100A)

void setup()

{

Serial.begin(115200);

pinMode(13, OUTPUT);

Vref = readVref(); //Read reference voltage

}

void loop()

{

float ACCurrentValue = readACCurrentValue(); //read AC Current Value

Serial.println(ACCurrentValue);

digitalWrite(13, HIGH);

delay(50);

digitalWrite(13, LOW);

delay(50);

}

float readACCurrentValue()

{

float ACCurrtntValue = 0;

unsigned int peakVoltage = 0;

unsigned int voltageVirtualValue = 0; //Vrms

for (int i = 0; i < 5; i++)

{

peakVoltage += analogRead(ACPin); //read peak voltage

delay(1);

}

peakVoltage = peakVoltage / 5;

voltageVirtualValue = peakVoltage * 0.707; //change the peak voltag

e to the Virtual Value of voltage

/*The circuit is amplified by 2 times, so it is divided by 2.*/

voltageVirtualValue = (voltageVirtualValue * Vref / 1024) / 2;

ACCurrtntValue = voltageVirtualValue * ACTectionRange;

return ACCurrtntValue/1000;

}

/*Read reference voltage*/

long readVref()

{

long result;

#if defined(__AVR_ATmega168__) || defined(__AVR_ATmega328__) || defined (__AV

R_ATmega328P__)

ADMUX = _BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1);

#elif defined(__AVR_ATmega32U4__) || defined(__AVR_ATmega1280__) || defined(_

_AVR_ATmega2560__) || defined(__AVR_AT90USB1286__)

ADMUX = _BV(REFS0) | _BV(MUX4) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1);

ADCSRB &= ~_BV(MUX5); // Without this the function always returns -1 on t

he ATmega2560 http://openenergymonitor.org/emon/node/2253#comment-11432

#elif defined (__AVR_ATtiny24__) || defined(__AVR_ATtiny44__) || defined(__AV

R_ATtiny84__)

ADMUX = _BV(MUX5) | _BV(MUX0);

#elif defined (__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || defined(__AV

R_ATtiny85__)

ADMUX = _BV(MUX3) | _BV(MUX2);

#endif

#if defined(__AVR__)

delay(2); // Wait for Vref to settle

ADCSRA |= _BV(ADSC); // Convert

while (bit_is_set(ADCSRA, ADSC));

result = ADCL;

result |= ADCH << 8;

result = 1126400L / result; //1100mV*1024 ADC steps http://openenergymonit

or.org/emon/node/1186

return result;

#elif defined(__arm__)

return (3300); //Arduino Due

#else

return (3300); //Guess that other un-suppo

rted architectures will be running a 3.3V!

#endif

}

P1-P3 P4-P6 P7-P9 P10-P11

SEN0211

Mfr. #:

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Manufacturer:

DFRobot

Description:

Current Sensor Development Tools Gravity Analog AC Current Sensor

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