ESP32 Smart Energy Monitor
Monitor voltage, current, power, and energy consumption in real time using ESP32 and IoT-based energy sensors.
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₹5119.00
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Components
8 items
Difficulty
Advanced
Build Time
2-4 hours
Project Details
How It Works
How It WorksThe ESP32 connects to the PZEM-004T energy meter via UART serial communication. The PZEM module measures voltage, current, power, and energy from an AC load using its internal sensors and current transformer. The ESP32 reads this data periodically and processes it. Using Wi-Fi, the ESP32 sends the data to a local web server or cloud IoT platform (like ThingSpeak or Blynk). A web dashboard displays real-time metrics, historical trends, and alerts. The system can be scaled by adding more PZEM modules for multiple loads.
Prerequisites
Basic knowledge of electronics and microcontrollers (ESP32), familiarity with Arduino IDE and C++ programming, understanding of AC power concepts and safety precautions. Experience with Wi-Fi and IoT concepts is helpful but not mandatory.
What You'll Learn
What You'll LearnLearn to connect and read data from PZEM-004T energy meter
Understand how to measure voltage, current, power, and energy in real time
Master UART serial communication with external modules
Build systems for remote monitoring and data logging
Gain foundational knowledge of smart energy management systems
Key Features
Continuously tracks and displays voltage, current, and power consumption
Measures cumulative energy usage over time for billing or analysis
Sends data to cloud platforms or local dashboards for remote access
Integrates with IoT platforms like Blynk, ThingSpeak, or custom web servers
Can be expanded to monitor multiple electrical devices using additional PZEM modules
What's Included in the Kit
| Component | Qty | Price |
|---|---|---|
 | 1 | ₹1682.00 |
 | 1 | ₹1298.00 |
 | 1 | ₹0.00 |
 | 1 | ₹599.00 |
 | 1 | ₹0.00 |
 | 1 | ₹171.00 |
 | 1 | ₹190.00 |
 | 1 | ₹0.00 |
Operating Instructions
Pin Connections
Pin Connections| MCU Pin | Connected To | Purpose | Notes |
|---|---|---|---|
| GPIO 16 | PZEM-004T RX | UART RX for receiving data from PZEM | Serial2 RX pin |
| GPIO 17 | PZEM-004T TX | UART TX for sending commands to PZEM | Serial2 TX pin |
| GND | PZEM-004T GND | Common ground reference | Ensure proper grounding |
| 5V | PZEM-004T VCC | Power supply for PZEM module | Check voltage compatibility |
Tools Required
Tools RequiredSafety Precautions
Electrical
- ⚠CRITICAL – HIGH VOLTAGE: Only qualified persons should handle AC wiring
- ⚠Always turn off mains power before wiring any AC components
- ⚠Use insulated tools when working with live circuits
- ⚠Enclose the circuit in a proper enclosure to prevent accidental contact
- ⚠Keep ESP32 isolated from the AC side to avoid damage and ensure safety
Frequently Asked Questions
Frequently Asked QuestionsQ:Can this monitor multiple loads?
Q:Can data be stored?
Q:Is this suitable for solar systems?
Q:Can alerts be added?
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