PZEM-004T Small AC Voltmeter Single-Phase Frequency Current Watt KWH Meter TTL Modbus Electric Energy Coil CT Energy Meters.
The PZEM-004T V4.0 is a single-phase AC power monitoring module used to measure voltage, current, active power, frequency, power factor, and energy. Unlike older versions, the v4.0 features native 3.3V operation, allowing it to connect directly to microcontrollers like the ESP32 without needing level shifters.
Key Features
- Direct 3.3V Interface: Easily communicates with ESP32 or ESP8266 boards via TTL/Modbus-RTU without extra components.
- Industrial Accuracy: Uses the SD3004 IC for precise, real-time power data and self-powered operation from the AC mains.
- Current Capacity: Capable of measuring up to 100A using a non-invasive split-core Current Transformer (CT).
Software & Integration
- For coding the module, a standard UART/Software
- Serial interface is used.
- Protocol: Modbus-RTU protocol over TTL.
- Library: Ensure you are using a library updated specifically for the v4.0 version (often named PZEM004Tv40.h) to avoid compilation errors associated with older iteration libraries.
Key attributes
Phase: Single Phase
Output Voltage: 220V
Accuracy Class: 1.0
Max. Current: 100 A
Rated Current: 0.05 A～100 A
Measuring Energy Range: 0-9999kwh
Model Number: PZEM-004T
Type: Energy Digital Kwh Meter
Communication: TTL port
voltage test range: 80-260V
power test range: 0-22kw
Application: Electric Power
Product name
Single Phase Electronic KWh Meter
Frequency: 45~65Hz
Typical Applications:
- IoT-based energy monitoring (Smart Home)
- AC power monitoring
- Prepaid energy meter projects
Resources:
1. PZEM-004T-v30: Arduino library for the Updated ...