Can't read (volt, current, power, energy) from PZEM-004

Other Hardware Motors, Mechanics, Power and CNC
1

Hi,
I connected arduino with PZEM-004 to read (volt, current, power, energy) from motor but (volt, current, power, energy) alway display 0 in Serial Monitor

#include <PZEM004Tv30.h>
PZEM004Tv30 pzem(11, 12);
void setup() {
Serial.begin(115200);
}
void loop() {
float voltage = pzem.voltage();
if(voltage != NAN){
Serial.print(“Voltage: “); Serial.print(voltage); Serial.println(“V”);
} else {
Serial.println(“Error reading voltage”);
}
float current = pzem.current();
if(current != NAN){
Serial.print(“Current: “); Serial.print(current); Serial.println(“A”);
} else {
Serial.println(“Error reading current”);
}
float power = pzem.power();
if(current != NAN){
Serial.print(“Power: “); Serial.print(power); Serial.println(“W”);
} else {
Serial.println(“Error reading power”);
}
float energy = pzem.energy();
if(current != NAN){
Serial.print(“Energy: “); Serial.print(energy,3); Serial.println(“kWh”);
} else {
Serial.println(“Error reading energy”);
}
float frequency = pzem.frequency();
if(current != NAN){
Serial.print(“Frequency: “); Serial.print(frequency, 1); Serial.println(“Hz”);
} else {
Serial.println(“Error reading frequency”);
}
float pf = pzem.pf();
if(current != NAN){
Serial.print(“PF: “); Serial.println(pf);
} else {
Serial.println(“Error reading power factor”);
}
Serial.println();
delay(2000);
}
2

IS the motor powered from AC mains and does the motor rotate?

3

Yes

4

And are you seeing all the error messages on the serial monitor?

5

Serial monitor don’t display error, only show 0V,0A,0W,0Wh

6

I do not see where you define the type of processor you are using. Reading the documentation for the include file, it shows a #define for the processor type so the code that results matches your actual processor.

7

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