# Arduino Opta WiFi

> Industrial micro PLC with STM32H747 dual-core Cortex-M7/M4, WiFi, BLE, Ethernet, 4\u00d72.3kW relays, Modbus TCP/RTU, hardware security, DIN rail mount, and IEC 61131-3 PLC programming — co-developed with Finder for real industrial automation.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** industrial-controller
- **Price:** ~$168
- **Product Readiness:** consumer
- **CPU:** ARM Cortex-M7 @ 480MHz,Cortex-M4 @ 240MHz
- **CPU Architecture:** ARM Cortex-M7
- **CPU Cores:** 2
- **RAM:** 1MB SRAM
- **Flash:** 2MB
- **USB:** USB-C
- **Power:** 12-24V DC industrial
- **Operating Voltage:** 3.3V
- **Dimensions:** DIN rail (4 modules wide)
- **Weight:** 200g
- **Antenna:** Built-in PCB antenna
- **SD Card:** No

## Connectivity

- **Wifi:** 802.11 b/g/n
- **Bluetooth:** BLE
- **Ethernet:** 10/100 Mbps

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Certifications

CE, UL

## Compatible Firmware

arduino

## Use Cases

- industrial-automation
- smart-switch
- industrial-iot

## Components

- **STM32H747XI** (mcu): STM32H747XI with Cortex-M7 at 480MHz and Cortex-M4 at 240MHz for real-time PLC control. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32h747xi.pdf&ref=openhardware.directory&product=arduino-opta-wifi&source=md-export)

## Protocols

- **Modbus TCP**: notes: Via Ethernet port
- **Modbus RTU**: notes: Via RS-485
- **Ethernet**: notes: RJ45 port
- **I2C**: notes: Via expansion port

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| I1 | Analog/Digital Input | ADC | digital-input, adc |
| I2 | Analog/Digital Input | ADC | digital-input, adc |
| I3 | Analog/Digital Input | ADC | digital-input, adc |
| I4 | Analog/Digital Input | ADC | digital-input, adc |
| I5 | Analog/Digital Input | ADC | digital-input, adc |
| I6 | Analog/Digital Input | ADC | digital-input, adc |
| I7 | Analog/Digital Input | ADC | digital-input, adc |
| I8 | Analog/Digital Input | ADC | digital-input, adc |
| R1 | Relay Output (2.3kW) |  | digital-output |
| R2 | Relay Output (2.3kW) |  | digital-output |
| R3 | Relay Output (2.3kW) |  | digital-output |
| R4 | Relay Output (2.3kW) |  | digital-output |

## Description

## Overview

The Arduino Opta WiFi is a professional micro PLC co-developed with Finder, bringing Arduino's ease of use to industrial automation. Built around the STM32H747XI dual-core processor (Cortex-M7 at 480MHz + Cortex-M4 at 240MHz), it provides the processing power for real-time control, predictive maintenance, and IoT connectivity in a DIN-rail-mountable industrial enclosure.

Connectivity options include WiFi, Bluetooth LE, and Ethernet with Modbus TCP/RTU support for fieldbus integration. Four high-power relays rated at 2.3kW each can directly switch AC loads, while 8 configurable analog/digital inputs handle sensor data. Hardware-level security via the onboard secure element with X.509 certificate support ensures encrypted communication.

The Opta supports standard IEC 61131-3 PLC programming languages (Ladder Logic, Function Block Diagram) alongside Arduino IDE and Arduino Cloud, enabling OTA firmware updates and remote dashboards. It's CE and UL certified for industrial deployment.

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Fopta-wifi&ref=openhardware.directory&product=arduino-opta-wifi&source=md-export) — $168.00
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fopta-wifi&ref=openhardware.directory&product=arduino-opta-wifi&source=md-export) — €185.23
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FAFX00002%2F17629432&ref=openhardware.directory&product=arduino-opta-wifi&source=md-export) — $195.00
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FAFX00002&ref=openhardware.directory&product=arduino-opta-wifi&source=md-export) — $195.00

## Resources

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fopta-wifi&ref=openhardware.directory&product=arduino-opta-wifi&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fopta%2F&ref=openhardware.directory&product=arduino-opta-wifi&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2FAFX00002-datasheet.pdf&ref=openhardware.directory&product=arduino-opta-wifi&source=md-export)

## Tags

`arduino`, `opta`, `plc`, `industrial`, `wifi`, `ethernet`, `modbus`, `relay`, `din-rail`

## Images

![Arduino Opta WiFi](https://nbg1.your-objectstorage.com/openhardware-directory/entities/arduino-opta-wifi/1d1956790554.jpg)

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