OTA-Updatable Building Automation Controller
OTA-Updatable Building Automation Controller: 4‑Zone PID HVAC Control with Arduino Portenta C33
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Engineer a professional building automation controller that receives digitally signed firmware deltas over Wi‑Fi — you can remotely patch and improve zone regulation without ever touching the hardware. Four independent HVAC channels are managed by per‑zone PID algorithms, driving relay outputs based on industrial‑grade DS18B20 temperature probes. The result is a DIN‑rail‑mounted system ready for real‑world deployment.
What You'll Build
A DIN‑rail enclosure houses the Portenta C33 and a compact carrier board, connecting four 1‑Wire temperature probes and a 4‑channel relay module. An OLED display shows current zone temperatures, setpoints, and RTC‑stamped logs. Signed OTA updates flow through the C33’s Wi‑Fi stack, enabling you to evolve the control logic, add new features, or fix bugs without a programmer. The entire system behaves like a miniature Building Management System you can prototype for hostels, labs, or smart‑home installations.
What You'll Learn
- Implement signed Over‑the‑Air firmware delta updates on an Arm Cortex‑M33 microcontroller with ESP32‑based connectivity
- Design and tune four independent PID control loops to minimise overshoot and steady‑state error in HVAC relay actuation
- Interface multiple DS18B20 temperature probes over long cable runs using OneWire and hardware filtering capacitors
- Integrate a DS3231 RTC, OLED display, buck converter, and flyback diodes into a reliable IoT controller
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Portenta C33 | 1 |
| Portenta Mid Carrier | 1 |
| DS18B20 Probe | 4 |
| 4-ch Relay Module | 1 |
| DS3231 RTC | 1 |
| 0.96in OLED | 1 |
| LM2596 Buck Converter | 1 |
| 1N4007 Diode | 5 |
| 4.7kΩ Resistors | 5 |
| 100nF Capacitors | 10 |
| PCB Prototype Board | 2 |
| DIN Rail Enclosure | 1 |
| 12V 3A Power Supply | 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
B.Tech final‑year students in ECE, EEE, or Computer Science who need an industry‑standard capstone project. Smart India Hackathon participants prototyping intelligent building solutions. Embedded systems enthusiasts from IITs, NITs, VIT, BITS Pilani, and other engineering colleges who want to master OTA update architectures and real‑time PID control on a production‑ready microcontroller.
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 kit’s QR code to launch the AI companion that walks you through schematics, wiring, and PID tuning. For trickier issues, real‑time WhatsApp support is available.
Can I expand the controller to more than four zones?
Yes. The Portenta C33 has abundant GPIO and the relay module can be replaced with an 8‑channel version. The AI companion includes hints on scaling the PID loop array and updating the OTA partition layout accordingly.
How are OTA firmware updates secured?
The kit uses signed delta updates. The C33’s secure boot and cryptographic hardware verify each firmware image before flashing, preventing unauthorised modifications during transmission over Wi‑Fi.
Do I need extensive PID experience before starting?
Basic familiarity with control systems is helpful, but the AI companion provides pre‑tuned gains for typical HVAC loads and a step‑by‑step tuning procedure. You’ll learn by doing without getting lost in theory.
C33 receives signed OTA firmware delta over WiFi. Controls HVAC relay zones with temperature PID per zone.
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