PZEM-004T v3.0 -with MODBUS PROTOCOL-

Arduino library to connect to the PZEM004T v3.0 sensor, thanks to the Modbus protocol

• Sensor manufacturer specifications
• Example
• Version changes
• Tested boards
• Improvements
• Authors

Sensor manufacturer specifications

Function	Measuring range	Resolution	Accuracy
Voltage	80~260V	0.1V	0.5%
Current	0~10A or 0~100A	0.01A or 0.02A	0.5%
Active power	0~2.3kW or 0~23kW	0.1W	0.5%
Active energy	0~9999.99kWh	1Wh	0.5%
Frequency	45~65Hz	0.1Hz	0.5%
Power factor	0.00~1.00	0.01	1%

Example

#include <PZEM004Tv30_MODBUS.h>

PZEM004Tv30_MODBUS sensor(&Serial2, 1);

void setup() {
  // Config serial
  Serial.begin(115200);
  // Initialize sensor and connect to it through the Modbus protocol
  Serial.println("Initializing PZEM004-v3.0 ...");
  sensor.setupPZEM004();
}

void loop() {

double value;

  value = sensor.getPZEM004Voltage();
  Serial.print("Voltage / Voltaje: "); Serial.println(value);   // V
  delay(1000);
  
  value = sensor.getPZEM004Current();
  Serial.print("Current / Intensidad: "); Serial.println(value);   // A
  delay(1000);
  
  value = sensor.getPZEM004Power();
  Serial.print("Power / Potencia: "); Serial.println(value);   // W
  delay(1000);
  
  value = sensor.getPZEM004Energy();
  Serial.print("Energy / Energia: "); Serial.println(value);   // kWh
  delay(1000);
  
  value = sensor.getPZEM004Frequency();
  Serial.print("Frecuencia / Frecuencia: "); Serial.println(value);   // Hz
  delay(1000);
  
  value = sensor.getPZEM004Pf();
  Serial.print("Power Factor / Factor de potencia: "); Serial.println(value);
  delay(1000);
  
  value = sensor.getPZEM004Alarm();
  Serial.print("Alarm / Alarma: "); Serial.println(value);
  delay(1000);

  Serial.println("Next =================================");
}

Version changes

v1.0.0

• First Version

Tested boards

• ESP32

Improvements

• Currently only connections are used through hardwareserial port, so it would be interesting to include the possibility of using Softwareserial

Authors:

Jose Carlos Serrano Catena.

First Version: 30/08/2019