Secure MQTT with TLS Certificates
Master IoT Security: ESP32 Mutual TLS Secure Sensor Station Kit
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'll build an ESP32-powered environmental sensor node that publishes temperature, humidity, and pressure data over MQTT with mutual TLS encryption. Every data packet is authenticated from endpoint to server, making it ideal for campus IoT projects, secure industrial monitoring prototypes, or hackathon challenges where data integrity matters.
What You'll Build
An end-to-end secure IoT station that reads DHT22 and BMP280 sensor data, displays it on a 0.96-inch OLED, and transmits it to a Mosquitto broker using client and server certificates. The certificate is stored in SPIFFS on the ESP32, verifying the server’s identity before each publish. You’ll walk away with a deployable node that demonstrates certificate-based authentication and encrypted communication.
What You'll Learn
- Generate and manage self-signed certificates and configure mutual TLS on a Mosquitto broker
- Store and retrieve client certificates securely on ESP32’s SPIFFS filesystem
- Publish authenticated MQTT messages from DHT22 and BMP280 sensors with server certificate verification
- Prevent man-in-the-middle attacks by enforcing strict TLS handshake rules on embedded hardware
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| DHT22 | 1 |
| BMP280 | 1 |
| 0.96in OLED | 1 |
| 4.7kΩ Resistors | 5 |
| 100nF Caps | 5 |
| PCB Prototype Board | 2 |
| 5V 2A PSU | 1 |
| Enclosure Box | 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
Designed for B.Tech ECE/EEE students tackling IoT security in their final-year or Smart India Hackathon projects. It’s equally relevant for ATL Tinkering Labs exploring advanced secure sensor networks, and for IIT, NIT, VIT, or BITS Pilani students building a trusted MQTT infrastructure. Prior ESP32 programming experience is 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?
The AI companion walks you through each step, including certificate generation and SPIFFS upload. You can also reach our team on WhatsApp for quick, project-specific help.
Do I need a separate Mosquitto server to complete this project?
The kit includes guidance to set up a local Mosquitto broker on a PC or Raspberry Pi. The AI companion provides complete server configuration instructions, and you can later move to a cloud-hosted broker using the same mutual TLS principles.
Can I use my own certificate authority instead of self-signed certificates?
Absolutely. You’ll learn how to generate and trust any CA. The project teaches certificate management fundamentals so you can adapt to corporate or cloud CA chains seamlessly.
Is soldering experience required for this kit?
Basic soldering is needed to assemble the sensor board on the prototype PCB. The included soldering iron and solder wire make it easy, and the AI companion has a visual guide. If you’re new to soldering, this is a manageable first project.
ESP32 connects to Mosquitto with mutual TLS. Client certificate stored in SPIFFS. Verifies server certificate.
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