Digital Twin Sensor Shadow Variant 8 Kit with ESP32 + DHT22
Build a Sub-500ms Digital Twin with ESP32 and AWS IoT Device Shadow
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
You will construct a sensor-aggregation node that reports temperature, humidity, pressure, and time to AWS IoT Core, while the cloud can turn relays on or off within half a second – a true digital twin. This kit takes you deep into bidirectional state synchronisation, enabling real-world hardware to mirror desired shadow states with sub-500ms latency, ideal for remote industrial control and monitoring applications.
What You'll Build
A fully functional IoT endpoint with DHT22, BMP280, and DS3231 sensors, plus a 4-channel relay controller, all synchronised bidirectionally with the AWS cloud via Device Shadow. When you update a relay's desired state in the AWS console, the physical relay clicks to match in under 500 milliseconds. The onboard OLED displays live sensor readings and shadow sync status, giving you immediate visual feedback on the digital-physical loop.
What You'll Learn
- Provisioning an ESP32 with AWS IoT Core and X.509 certificates for secure MQTT communication
- Implementing Device Shadow MQTT topics (update/delta/accepted) for state synchronisation
- Aggregating multiple I2C sensors (BMP280, OLED) and a one-wire sensor (DHT22) on a single ESP32 without bus conflicts
- Using an RTC (DS3231) for precise timestamping of sensor data before pushing to the cloud
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| DHT22 | 1 |
| BMP280 | 1 |
| 4-ch Relay Module | 1 |
| DS3231 RTC | 1 |
| LM2596 Buck Converter | 1 |
| 0.96in OLED | 1 |
| 100nF Caps | 10 |
| 4.7kΩ Resistors | 5 |
| PCB Prototype Board | 2 |
| Enclosure Box | 1 |
| 5V 2A PSU | 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 kit is designed for final-year B.Tech (ECE/EEE) students building IoT-based capstone projects, Smart India Hackathon teams requiring real-time cloud synchronisation, and professional engineers prototyping industrial monitoring systems. Research scholars at IIT, NIT, VIT, or BITS Pilani will also find it a ready platform for publishing work on edge-cloud digital twins. Some embedded C/C++ experience and basic familiarity with AWS are expected.
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?
Open the AI companion via the QR code on your box; it has been trained specifically on this Digital Twin Sensor Shadow project. You can also send a WhatsApp message to our support team for a human reply within hours.
Do I need an AWS account, and are there costs?
Yes, you’ll need your own AWS account. The free tier is more than sufficient for this project; if you exceed limits, typical costs stay under ₹50/month. The companion guide explains how to set up IoT Core without unexpected charges.
Can I monitor sensor data on my phone?
Absolutely. You can build a simple dashboard using AWS IoT SiteWise or a custom web app. The AI companion shows you how to visualise shadow state updates in real time on any browser or mobile, no extra hardware required.
How is the 500ms shadow update guaranteed?
The ESP32 subscribes to the shadow delta topic and uses high-frequency MQTT keep‑alive with the AWS IoT endpoint. Combined with region latency optimised for Asia‑Pacific (Mumbai), you will consistently see relay toggling within 500ms. The code is pre‑optimised in the companion guide.
ESP32 device state synced to AWS IoT Device Shadow. Shadow desired state changes reflected in hardware within 500ms.
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.
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