ESP32 Home Assistant Kit: Control 4 Relays & 6 Sensors
Build a 6-Sensor, 4-Relay Smart Home Controller with ESP32 for Home Assistant
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Imagine adjusting your room's lights and fan from your phone, or getting a notification the moment motion is detected in your workspace - all using a single ESP32 board and Home Assistant. This kit delivers the exact parts to build a native ESP32 Home Assistant controller that exposes 6 real-time sensors and independently controls 4 high-power appliances, with no cloud dependencies or third-party bridges.
What You'll Build
A fully functional ESP32-based smart home controller. It reports temperature and humidity from two DHT22 sensors, detects occupancy with PIR modules, displays status on an OLED screen, and safely switches up to four AC devices via a 4-channel relay module. Everything is manageable from the Home Assistant mobile app - turn on a heater when it's cold, trigger a fan on motion, or schedule lights from anywhere.
What You'll Learn
- Wiring and configuring DHT22 temperature/humidity sensors with ESP32
- Integrating PIR motion sensors for room occupancy detection
- Controlling AC appliances safely using a 4-channel relay module and protective diodes
- Setting up the native ESP32 Home Assistant API for remote monitoring and control via mobile
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| DHT22 | 2 |
| HC-SR501 PIR | 2 |
| 4-ch Relay Module | 1 |
| LM2596 Buck Converter | 1 |
| 0.96in OLED | 1 |
| 1N4007 Diode | 5 |
| 4.7k? Resistors | 5 |
| 100nF Caps | 10 |
| 400-pt Breadboard | 1 |
| M-M Wires | 25 |
| 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
Ideal for B.Tech ECE/EEE students building IoT or home automation projects, Smart India Hackathon participants prototyping smart environment solutions, and ATL Tinkering Lab students in classes 11-12 exploring sensor networks. Hobbyists who want a reliable, pre-configured kit to skip compatibility headaches will also find everything they need in one box.
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 launch the AI companion, which gives step-by-step guidance for this kit. If you prefer human help, WhatsApp us directly - we respond within hours.
Do I need to solder anything to build this controller?
No soldering is required. All sensor and relay connections use the included M-M wires and breadboard. The relay module has screw terminals for appliance wiring, which only need a small screwdriver.
Can I use this with an existing Home Assistant setup?
Absolutely. The ESP32 is flashed with ESPHome firmware, and we provide the exact YAML configuration file via the AI companion. It integrates directly with your Home Assistant instance over Wi-Fi, with no extra hardware.
How many appliances can I control with the 4 relays?
Each relay can switch up to 10A at 250V AC (light, fan, heater, etc.). You can independently control four devices. The included 1N4007 diodes protect against voltage spikes from inductive loads like motors.
ESP32 native HA API exposes 6 sensors and 4 relays. Control from Home Assistant mobile app.
What's in this kit
- ESP32 Dev Board
- DHT22 x2
- HC-SR501 PIR x2
- 4-ch Relay Module
- LM2596 Buck Converter
- 0.96in OLED
- 1N4007 Diode x5
- 4.7k? Resistors x5
- 100nF Caps x10
- 400-pt Breadboard
- M-M Wires x25
- Micro USB Cable
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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