dasetiawan / esp32-pzem004t

power metering using ESP32 and PZEM004T over MQTT

Project Description

This IoT project is to measure power and energy consumption using PZEM-004T v3 sensor and NodeMCU ESP32

Before start to monitoring, the PZEM-004T sensor must be modified first because the voltage on the sensor is 5V while the ESP32 is 3.3V. Modifications are made to the sensor by adding a resistor with a value of 1k ohms. Data read by the sensor is voltage, current, power and energy data. Data on ESP32 is converted into JSON file format and then sent to the MQTT broker (in this project I use Eclipse Mosquitto) via WiFi.

for details, check my wiki on: https://github.com/dasetiawan/ESP32-PZEM004T/wiki/ESP32-PZEM004T-Wiki!

esp32-pzem004t's Issues

Code "Hangs" while no AC Grid Connected

Hi @dasetiawan !

Thank you for your easy to use Library!

I have a question, if I disconnect the PZEM from the Grid, the ESP/Arduino want´s always to send data and hangs in a "loop" so nothing else is excecuted untill i connect the AC Grid back? Do you have any idea how to chance this?

Thans in advance.

serial2' was not declared in this scope

Hi,
I am getting the subject error while compiling the code. Can you tell me why please?

Did you make it work in ESP32

Hi, I try to connect PZEM004Tv3 to esp32. No back response. Works fine with ESP8266 (Software serial).
The RX LED on PZEM flashes, but not the TX LED flash (as with ESP8266)
Pins 16,17.
Any suggestions ?