Industrial OPC-UA Gateway Variant 33 Kit with Arduino Mega + LED
Industrial OPC-UA Gateway Kit: Modbus RTU to SCADA with Arduino Mega & ESP32
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Industries still run on Modbus RTU sensors and PLCs, but modern SCADA systems demand OPC-UA. This kit empowers you to build an industrial-grade gateway that polls Modbus data from field devices and publishes it as OPC-UA nodes via an ESP32 – a real-world skill used in factory automation and Smart India Hackathon challenges.
What You'll Build
You will assemble an Arduino Mega-based Modbus master that reads sensor values over RS-485, an ESP32 that runs a lightweight OPC-UA server, and use the onboard LED for network health indication. The enclosed DIN rail enclosure makes the gateway ready for industrial panel mounting. By the end, you'll have a working gateway that can be connected to any SCADA software like Ignition, Open Automation, or WinCC to monitor temperature, pressure, or flow data.
What You'll Learn
- Reading Modbus RTU sensor data over RS-485 with Arduino Mega and MAX485 transceiver
- Creating OPC-UA server nodes on ESP32 using the open62541 library
- Integrating serial-to-WiFi gateway architecture for industrial networks
- Configuring SCADA clients to discover and subscribe to OPC-UA nodes
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Mega 2560 | x1 |
| ESP32 Dev Board | x1 |
| MAX485 RS485 | x1 |
| 0.96in OLED | x1 |
| LM2596 Buck Converter | x1 |
| 120Ω Resistors | x5 |
| 10kΩ Resistors | x5 |
| 100nF Caps | x10 |
| PCB Prototype Board | x2 |
| DIN Rail Enclosure | x1 |
| 12V Adapter | x1 |
| Soldering Iron | x1 |
| Solder Wire | x1 |
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
If you're a B.Tech student building a final-year project on IIoT, or preparing for Smart India Hackathon's industrial track, this kit gives you a ready-to-assemble OPC-UA gateway. It's also ideal for ECE/EEE diploma and engineering students at VIT, BITS, NITs, and IITs tackling SCADA automation challenges.
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 provides instant troubleshooting for wiring, code, and protocol stack issues. You can also reach our team on WhatsApp for urgent guidance.
Do I need any additional software like SCADA to test the gateway?
The kit includes a simple Python SCADA client script accessible via the AI companion. You can test with open-source SCADA tools like Open Automation without buying commercial licenses.
Is the gateway certified for industrial use?
The gateway is a learning and prototyping kit. For production deployment, you must validate safety and compliance as per Indian electrical standards and OPC-UA certification requirements.
Can I connect multiple Modbus sensors?
Yes, the Arduino Mega can poll multiple Modbus RTU slaves on the RS-485 bus. The firmware sample in the companion shows addressing up to 5 devices, and you can scale further with additional programming.
Arduino Mega reads Modbus RTU sensors and exposes them as OPC-UA nodes via ESP32 for SCADA 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