Hi there, I’m totally new here.
I am attempting to build 3 phase voltage monitoring with ZMPT101B sensors. The issue is that i can not write the code to make it read 2 or more analogue sensors.
I am using the ESP32 .
This is the code needed for the Voltage sensor
#include <Filters.h>
float testFrequency = 50; // signal frequency (Hz)
float windowLength = 40.0/testFrequency; // how long to average the signal, for statistist
int Sensor = 0;
float intercept = -0.04; // adjust untuk kalibrasi
float slope = 0.0964; // adjust untuk kalibrasi
float current_Volts;
unsigned long printPeriod = 1000; //Refresh rate
unsigned long previousMillis = 0;
void setup() {
Serial.begin( 9600 );
Serial.println("AC Voltmeter");
//delay(5000);
}
void loop() {
RunningStatistics inputStats;
inputStats.setWindowSecs( windowLength );
while( true ) {
Sensor = analogRead(A0); // read the analog in value:
inputStats.input(Sensor); // log to Stats function
if((unsigned long)(millis() - previousMillis) >= printPeriod) {
previousMillis = millis(); // update time every second
current_Volts = intercept + slope * inputStats.sigma(); //Calibartions for offset and amplitude
current_Volts= current_Volts*(49.3231); //Further calibrations for the amplitude
Serial.print( "Voltage: " );
Serial.println( current_Volts );
}
}
}
And this is i’m trying to do to read 2 analogue sensors
#include <Filters.h>
float testFrequency = 50; // signal frequency (Hz)
float windowLength = 100.0/testFrequency; // how long to average the signal, for statistist
int Sensor1 = 0;
int Sensor2 = 0;
float intercept = 0; // adjust untuk kalibrasi
float slope = 0.01245; // adjust untuk kalibrasi
float Tegangan1;
float Tegangan2;
unsigned long printPeriod = 1000; //Refresh rate
unsigned long previousMillis = 0;
void setup() {
Serial.begin( 9600 );
Serial.println("AC Voltmeter");
//delay(5000);
}
void phase1() {
RunningStatistics inputStats;
inputStats.setWindowSecs( windowLength );
while( true ) {
Sensor1 = analogRead(34); // read the analog in value:
inputStats.input(Sensor1); // log to Stats function
if((unsigned long)(millis() - previousMillis) >= printPeriod) {
previousMillis = millis(); // update time every second
Tegangan1= (intercept + slope * inputStats.sigma())*(49.3231); //Calibartions for offset and amplitude
Serial.print( "Tegangan 1: " );
Serial.println( Tegangan1 );
}
}
delay(700);
}
void phase2() {
RunningStatistics inputStats;
inputStats.setWindowSecs( windowLength );
while( true ) {
Sensor2 = analogRead(35); // read the analog in value:
inputStats.input(Sensor2); // log to Stats function
if((unsigned long)(millis() - previousMillis) >= printPeriod) {
previousMillis = millis(); // update time every second
Tegangan2= (intercept + slope * inputStats.sigma())*(49.3231); //Calibartions for offset and amplitude
Serial.print( "Tegangan 2: " );
Serial.println( Tegangan2 );
}
}
delay(700);
}
void loop() {
phase1();
phase2();
delay(1000);
}
Can you read ONE sensor with the ESP32?
Yes i can, i use first code and modified it with my preference
What controller is the first code for?
I use esp32 in all this project
Have you tried the first code in the controller it was meant for.
I did and it works
I can see your have made two functions which is what I would do, but have you just got one to work?
On the second code, it only read the first sensor
What result do you get with your second code?
It only read 1 sensor, the second sensor isn't appear
Pada tanggal Sab, 21 Mei 2022 12.32, TomGeorge Believes in the Lucas Smoke Theory. via Arduino Forum <arduino@discoursemail.com> menulis:
I see the ZMPT101B gives you the voltage
if you also require current I have found a SCT-013 current clamp suitable to monitor the three phase grid supply to the house
I assume you are using the ZMPT 101 B Module to offset the AC voltage so it is suitable for sampling with an Arduino ADC?
Hi guys, my code already working. Thank you for your help. But i don't know if it can working to measuring 3 phase voltage. i have not try yet. Here is my code.
#include <Filters.h>
float testFrequency = 50; // signal frequency (Hz)
float windowLength = 40.0/testFrequency; // how long to average the signal, for statistist
int Sensor = 0;
int Sensor2 = 0;
int Sensor3 = 0;
int Sensor4 = 0;
int Sensor5 = 0;
int Sensor6 = 0;
float intercept = 0; // adjust untuk kalibrasi
float slope = 0.25731; // adjust untuk kalibrasi
float A;
float B;
float C;
float D;
float E;
float F;
unsigned long printPeriod = 1000; //Refresh rate
unsigned long previousMillis = 0;
void setup() {
Serial.begin( 115200 );
Serial.println("3 Phase Voltage Monitor");
//delay(5000);
}
void loop() {
RunningStatistics inputStats,inputStats2,inputStats3,inputStats4,inputStats5,inputStats6;
inputStats.setWindowSecs( windowLength );
while( true ) {
Sensor = analogRead(34); // read the analog in value:
inputStats.input(Sensor); // log to Stats function
Sensor2 = analogRead(35); // read the analog in value:
inputStats2.input(Sensor2); // log to Stats function
Sensor3 = analogRead(32); // read the analog in value:
inputStats3.input(Sensor3); // log to Stats function
Sensor4 = analogRead(33); // read the analog in value:
inputStats4.input(Sensor4); // log to Stats function
Sensor5 = analogRead(25); // read the analog in value:
inputStats5.input(Sensor5); // log to Stats function
Sensor6 = analogRead(26); // read the analog in value:
inputStats6.input(Sensor6); // log to Stats function
if((unsigned long)(millis() - previousMillis) >= printPeriod) {
previousMillis = millis(); // update time every second
A = intercept + slope * inputStats.sigma(); //Calibartions for offset and amplitude
B = intercept + slope * inputStats2.sigma(); //Calibartions for offset and amplitude
C = intercept + slope * inputStats3.sigma(); //Calibartions for offset and amplitude
D = intercept + slope * inputStats4.sigma(); //Calibartions for offset and amplitude
E = intercept + slope * inputStats5.sigma(); //Calibartions for offset and amplitude
F = intercept + slope * inputStats6.sigma(); //Calibartions for offset and amplitude
Serial.print( "Tengangan R-S: " );
Serial.println( A );
Serial.print( "Tengangan S-T: " );
Serial.println( B );
Serial.print( "Tengangan R-T: " );
Serial.println( C );
Serial.print( "Tengangan R-N: " );
Serial.println( D );
Serial.print( "Tengangan S-N: " );
Serial.println( E );
Serial.print( "Tengangan T-N: " );
Serial.println( F );
}
}
}
I want to measure both phase to phase voltage and phase to netral voltage. I want to apply it at the distribution substation. Is it possible to use the zmpt101b sensor?
Phase to phase voltage is related to phase to neutral
One is root 3 times the other, so no need to measure both .
That sensor is not for “ industrial “ use , it’s a hobby part . I would not use for anything other than hobby use , and then take precautions .
Buy a proper 3ph voltmeter and get a qualified person to install it . You can then use any output it may have .
The phase to phase voltage will exceed its rating if it’s a” 240v “ setup .
If it’s 415v then it’s definite not usable
