Smart Garden Watering Kit v5 - Portenta C33 Blockchain Sensor Node
Build a Blockchain-Anchored Agricultural Sensor Node with the Portenta C33 Smart Garden Watering Kit v5
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 garden into a secure data source for decentralized agriculture. Using the Arduino Portenta C33's crypto chip, you'll build a solar-powered sensor node that measures soil moisture, humidity, temperature, and light - then cryptographically signs every reading and publishes it via MQTT TLS to a blockchain-anchored agricultural data marketplace. It's a production-ready blueprint for verifiable sensor networks, digital crop passports, or tokenized farm analytics.
What You'll Build
A fully enclosed, weatherproof monitoring station that runs off two 18650 cells charged by a 6V solar panel. The C33 signs each sensor data batch with a unique hardware key, posts it over encrypted MQTT to a testnet marketplace, and logs everything locally on a microSD card. You'll hold a working proof-of-concept for a tamper-evident AgriTech data pipeline.
What You'll Learn
- Implementing MQTT TLS with client certificates on an embedded Arm Cortex-M33 microcontroller
- Leveraging the Portenta C33's secure element for hardware-anchored digital signatures on sensor payloads
- Integrating multiple I2C sensors (soil moisture, DHT22, BH1750, DS3231) on a single bus without conflicts
- Designing a Li-Ion solar charger and buck converter circuit for uninterrupted outdoor operation
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Portenta C33 | 1 |
| Portenta Mid Carrier | 1 |
| Soil Moisture Sensor | 3 |
| DHT22 | 1 |
| BH1750 | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| Solar Panel 6V 2W | 1 |
| TP4056 Module | 1 |
| 18650 Cell | 2 |
| LM2596 Buck Converter | 1 |
| 4.7k? Resistors | 5 |
| 100nF Caps | 10 |
| PCB Prototype Board | 2 |
| Waterproof 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 targets B.Tech ECE, CS, and AgriTech students building final-year projects around blockchain and IoT. It's equally suited for Smart India Hackathon teams addressing agricultural data integrity, IIT/NIT/VIT researchers prototyping decentralized sensor networks, and ATL Tinkering Lab mentors guiding advanced learners beyond basic Arduino - you'll need soldering skills and familiarity with terminal-based development.
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 each wiring and firmware step; if you need human clarification, WhatsApp support is included.
Do I need prior blockchain experience?
No. The kit provides pre-generated device certificates and a guided script that connects to a simulated agricultural marketplace, teaching you the flow as you go.
Can I anchor data to a public testnet like Ethereum Sepolia?
Yes. The sample firmware uses a lightweight HTTP endpoint to post signed hashes; you can easily modify it for any EVM-compatible chain, including Polygon Amoy or Ethereum Sepolia, by updating the API call.
How do I verify that the sensor data hasn't been tampered with?
The Portenta C33's secure element signs each payload with a unique private key. A verification script, included on the SD card image, checks the signature against the public key stored on-chain.
Garden - C33 with hardware-signed sensor readings posts to a blockchain-anchored agricultural data marketplace via MQTT TLS.
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