The PZEM-004T is a multifunctional AC power monitoring module designed to measure key electrical parameters such as voltage, current, active power, and energy consumption. It operates over a wide voltage range and is compatible with microcontroller platforms like Arduino, ESP8266, and Raspberry Pi, making it suitable for various applications, including energy monitoring, smart metering, and power analysis.

Features :

• Voltage Measurement
  • Range: 80–260V AC
  • Accurate monitoring of AC mains voltage
• Current Measurement
  • Range: 0–100A (with included external current transformer)
  • Suitable for both low and high current applications
• Power Measurement
  • Range: 0–22kW
  • Measures active power (real power consumption)
• Energy Consumption
  • Range: 0–9999.99 kWh
  • Tracks total energy usage over time
• Frequency Measurement
  • Range: 45–65 Hz
• Power Factor Measurement
  • Range: 0.00–1.00
  • Indicates load efficiency
• Measurement Accuracy
  • Typically ±1.0%
• Data Storage
  • Retains energy data when powered off
• Communication Interface
  • TTL Serial (UART) interface for real-time data output
  • Easy to connect with Arduino, ESP32, ESP8266, and other microcontrollers
• Compact Design
  • Small form factor makes it suitable for embedded projects and smart home installations
• Built-in Button
  • Manual reset for energy data (usually energy only, not voltage/current)
• External Current Transformer (CT)
  • Non-invasive clip-on design for safe current sensing

Specifications :

• Button Functionality: Zero reset for energy data
• Dimensions: Approximately 73mm x 30mm x 23mm
• Wiring and Integration :
  • The PZEM-004T module is equipped with a TTL serial interface, allowing for easy communication with microcontrollers. To interface with a computer or other devices, a TTL to USB or TTL to RS232 adapter is required. The module also includes a current transformer (CT coil) for current measurement, which must be correctly installed around the live wire of the AC circuit under test.

Applications :

• Energy Monitoring: Track real-time and cumulative energy consumption in residential or industrial settings.
• Smart Metering: Integrate with home automation systems for automated energy management.
• Power Analysis: Analyze power quality and efficiency in electrical systems.
• DIY Projects: Utilize in Arduino or Raspberry Pi-based energy monitoring projects.