PZEM-004T AC Energy Meter
AC voltage, current and energy module for smart meter FYP projects.
AI Ready Overview
Quick Summary
PZEM-004T is a energy meter commonly used in FYP and embedded projects. It is best for smart energy meter and appliance monitoring, with wiring and testing planned around Arduino, ESP32.
Difficulty
Advanced
Time Required
2-4 weeks for wiring, library setup, calibration, integration and reliable demo testing
Cost
RM25-RM60 module range in Malaysia; full project cost depends on scope.
Components
PZEM-004T, Arduino, ESP32
Overview
What is PZEM-004T?
PZEM-004T is used for AC energy monitoring projects. It can measure voltage, current, power and energy, but mains wiring must be handled safely.
Engineering Reference
Quick Specs
| Operating Voltage | 5V module / AC measurement terminals |
|---|---|
| Interface | UART |
| Difficulty | Advanced |
| Typical Malaysia Price | RM25-RM60 |
| Best For | Smart energy meter, Appliance monitoring |
Real Usage Notes
Suitable / Not Suitable
Suitable for
- ✓ Smart energy meter
- ✓ Appliance monitoring
- ✓ Power dashboard
Not suitable for
- ✕ Unsafe exposed mains demos
- ✕ Battery DC measurement
- ✕ Beginner wiring without supervision
Build Planning
Difficulty
PZEM-004T is rated Advanced. Plan around 2-4 weeks for wiring, library setup, calibration, integration and reliable demo testingdepending on wiring, libraries, calibration, dashboard/app integration and testing evidence.
Build Planning
Time Required
2-4 weeks for wiring, library setup, calibration, integration and reliable demo testing
Malaysia Price Guidance
Cost
Typical module price range: RM25-RM60. This is component guidance only; a complete FYP cost depends on controller, sensors, casing, display, app/dashboard, documentation and timeline.
Connections
Pinout
VCC
Power input. Check whether the module expects 5V module or AC measurement terminals before wiring.
GND
Common ground with the controller and external supply.
UART
Main UART connection used by the module.
IO
Additional signal pins depend on the exact module variant.
Platform Notes
Wiring Guides
PZEM-004T with Arduino / ESP32
Connect power, ground and the UART signal lines. Use level shifting when a 5V module connects to a 3.3V controller.
| PZEM-004T VCC | 5V module |
|---|---|
| PZEM-004T GND | Controller GND |
| Signal pins | UART |
Fix Common Problems
Troubleshooting
Troubleshooting
Common Mistakes
FYP Ideas Using PZEM-004T
Related Projects
Compare Options
Alternative Components
Student Questions
FAQ
Is PZEM-004T good for FYP projects?
Yes, PZEM-004T is suitable for FYP work when the project matches its limits: Smart energy meter and Appliance monitoring.
What is the most common PZEM-004T mistake?
Unsafe AC wiring