ESP32 Greenhouse Climate Monitor Kit - MQTT to REST IoT Data Bridge
ESP32 Greenhouse Climate Monitor Kit — Convert Sensor Payloads from MQTT to REST in One Integrated Build
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
The line between modern IoT and legacy greenhouse control systems often breaks at the data format. This kit teaches you to build a environmental monitor that uses an ESP32 to read DHT22 and BMP280 sensors over MQTT, then pushes that data to an HTTP REST API in a transformed JSON structure — exactly the kind of integration real-world growers need when upgrading old automation.
What You'll Build
You'll create a dual-format climate logger that publishes temperature, humidity, and barometric pressure via MQTT, while simultaneously formatting the same data as a REST-ready JSON payload for legacy dashboards. The OLED shows live readings; the RTC timestamps every packet, and two DHT22 sensors let you compare inside-vs-outside canopy conditions — a genuine precision agriculture setup.
What You'll Learn
- Bridge MQTT sensor topics to an HTTP REST endpoint with JSON schema conversion
- Handle dual DHT22 and BMP280 sensors concurrently on the ESP32 without blocking
- Use DS3231 RTC to timestamp sensor payloads that survive power cycles
- Design a soldered prototype board that handles 5V regulation and I2C line noise
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| DHT22 | 2 |
| BMP280 | 1 |
| DS3231 RTC | 1 |
| LM2596 Buck Converter | 1 |
| 0.96in OLED | 1 |
| 4.7kΩ Resistors | 5 |
| 100nF Caps | 10 |
| 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
Ideal for B.Tech ECE/EEE students tackling Smart India Hackathon agriculture challenges, final-year IoT project builders, and ATL mentors who want to teach protocol integration with real hardware. If you’re working on a precision farming dashboard that must talk to both MQTT feeds and REST APIs, this kit removes the guesswork.
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 QR code — it’s trained on this kit’s wiring, code, and common pitfalls. If needed, ping us on WhatsApp and an engineer who has built this exact project will respond within hours.
Do I need prior MQTT or REST API experience?
Yes, this kit is advanced. You should be comfortable with Arduino IDE, basic JSON, and networking concepts. The companion explains the protocol conversion step by step, but greenfield learners should start with an intermediate kit first.
Can I power this setup in a remote greenhouse without mains?
Yes, the LM2596 buck converter accepts a wide input range, so you can connect a 12V solar-charged battery. The ESP32’s deep sleep modes and RTC wake-up let you run for days on a modest power bank.
How does the JSON conversion handle nested sensor objects?
The ESP32 firmware maps DHT22 and BMP280 values from flat MQTT topics into a nested schema — for example, {“environment”:{“temperature”:{“inside”:23.5,”outside”:24.1}}}. The AI companion walks you through templating that output for legacy REST listeners.
Greenhouse — ESP32 bridges MQTT to HTTP REST API. Converts sensor payloads between JSON formats for legacy integration.
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