PZEM-004T is the best for the purpose of the DIY project, where we need to measure the voltage, current, and power using an Arduino/ESP8266/Raspberry Pi like open-source platform. In many electrical projects, the engineer directly deals with measurements with few basic requirements like

• High galvanic isolation
• Parameter display
• Direct communication with computer
• Data acquisition and storage with subsequent viewing or copying to the computer.

This module serves all these basic requirements of measurement PZEM-004T as a separate board. The physical dimensions of the PZEM-004T board are 3.1×7.4 cm, The PZEM-004 t module is bundled with a 33mm diameter current transformer coil.