Demand Response Load Controller Kit with ESP32 + Relay
Demand Response Load Controller Kit with ESP32 + Relay — Build Smarter Grid Awareness at Home
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
This kit transforms your home's electrical panel into a responsive, self-regulating energy hub. The ESP32 reads real-time grid draw from a PZEM-004T module; when consumption crosses a user-defined threshold, the system automatically sheds non-essential loads in a priority sequence — heater, water pump, then charging — while an OLED logs each event with a timestamp. It’s the safety logic of industrial demand response reshaped for a maker’s bench.
What You'll Build
You’ll assemble and program a DIN rail mountable load controller that watches your main incomer and keeps your sanctioned load untouched. The OLED shows live power, trip setpoint, and the last three shed events. Priority relaying means your fridge stays on while the geyser disconnects, and manual override buttons let you reinstate circuits from the enclosure face.
What You'll Learn
- Interface the PZEM-004T via Modbus RTU and parse real-time voltage, current, and active power data
- Design a weighted, priority-based load shedding algorithm that resists nuisance trips
- Log every trip and restoration moment to a microSD card with DS3231 time stamps
- Assemble high-voltage relay wiring safely inside a DIN enclosure, including buck-derived control power
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| PZEM-004T | 1 |
| 8-ch Relay Module | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 0.96in OLED | 1 |
| LM2596 Buck Converter | 1 |
| 1000µF 25V Caps | 3 |
| 100nF Caps | 10 |
| 10kΩ Resistors | 10 |
| PCB Prototype Board | 2 |
| DIN Rail Enclosure | 1 |
| Soldering Iron | 1 |
| Solder Wire | 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
This advanced kit fits ECE/EEE final-year B.Tech students crafting a working demand-side management prototype for capstone or Smart India Hackathon challenges. It’s also right for energy engineers in startups, ATL lab mentors needing a real grid-interactive demo, and home automation enthusiasts who want to move beyond simple on/off IoT to rule-based load control with logged accountability.
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?
The AI companion walks you through wiring, code upload, and calibration step by step — and WhatsApp help from our engineers is included if you hit an unexpected roadblock.
Can I change the load priorities after assembly?
Yes, the priority order is set in firmware and can be reconfigured via the OLED menu or by editing the ESP32 sketch. You assign which relay channel (and appliance) ranks 1, 2, or 3 for shedding.
Does this work with a single-phase 230V Indian supply?
Exactly. The PZEM-004T connects to a 230V line through the supplied CT and shunt, and the 8-channel relay switches live wires per load. A buck converter derives 5V for the logic from the same mains safely.
Will it keep logging even if Wi‑Fi disconnects?
Absolutely. The DS3231 RTC and microSD module ensure every trip event gets a timestamped entry on the card, independent of the network. The OLED shows real-time status regardless of connectivity.
PZEM-004T monitors grid draw. When above threshold, priority-ranked relay loads shed automatically with OLED log.
What's in this kit
Choose your assembly option:
- Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
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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