ESP8266 Electricity Bill Calculator Kit - Monitor Real-Time Power & See Your Monthly Bill on a Web Page
ESP8266 Electricity Bill Calculator Kit - Monitor Real-Time Power & See Your Monthly Bill on a Web Page
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
With this kit, you build a compact IoT device that connects to any appliance, measures its energy consumption in real-time using the PZEM-004T sensor, and displays the estimated monthly electricity bill on a custom web page hosted by the ESP8266. Perfect for students exploring smart home systems or anyone wanting to curb high power bills by tracking a single appliance like an AC, geyser, or refrigerator.
What You'll Build
You'll assemble a standalone energy monitoring unit that plugs in between your wall socket and an appliance. The system logs kilowatt-hours, displays current power on an OLED screen, and creates a Wi-Fi access point with a dashboard showing total kWh consumed, tariff rate, and the projected bill for the current month. It even timestamps logs on a microSD card for long-term analysis.
What You'll Learn
- Wiring and calibrating the PZEM-004T AC energy meter to read voltage, current, and power factor accurately
- Programming an ESP8266 to fetch sensor data via Modbus and serve a real-time web interface
- Integrating a DS3231 RTC to timestamp energy logs and calculate the bill based on daily/monthly tariff slabs
- Building a responsive HTML dashboard that auto-refreshes on any phone or laptop without external hosting
Kit Contents
| Component | Quantity |
|---|---|
| ESP8266 NodeMCU | 1 |
| PZEM-004T | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| LM2596 Buck Converter | 1 |
| 0.96in OLED | 1 |
| 100nF Caps | 5 |
| 400-pt Breadboard | 1 |
| M-M Wires | 15 |
| Micro USB Cable | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
Designed for CBSE Class 11-12 students building physics or computer science projects, B.Tech ECE/EEE undergraduates prototyping IoT solutions for Smart India Hackathon, and ATL tinkering lab facilitators who need a ready-to-go energy monitor. Hobbyists who want to audit home appliance electricity costs without manually decoding tariff slabs will also find this kit invaluable.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project - accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
Scan the QR code on the box to access the AI build companion, which provides step-by-step troubleshooting for this exact setup. You can also message us on WhatsApp for personalised support.
Can I use this kit to monitor a 230V AC appliance like an AC or water heater?
Yes, the PZEM-004T sensor is rated for 100-260V AC and up to 100A, perfectly matching Indian mains voltage. Plug the sensor between the appliance and the wall socket, and the included buck converter safely powers the ESP8266.
Is the web dashboard accessible on my phone?
Absolutely. The ESP8266 creates its own Wi-Fi network; connect any phone, tablet, or laptop and open the local IP address shown on the OLED. The responsive design ensures bill details and kWh data are easy to read on small screens.
Can I change the tariff rate to match my state's electricity slab?
Yes, the source code includes a simple configuration file where you enter the per-unit rate (e.g., ?5.50 for the first 200 units). The RTC then calculates the bill based on cumulative kWh since the 1st of the month, as per the programmed tariff.
PZEM-004T logs kWh per appliance. ESP8266 calculates monthly bill at programmed tariff rate on web page.
What's in this kit
Other projects you can build
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items