EQSP32CE – Industrial IoT ESP32 PLC with Ethernet

Description

EQSP32CE is a next-generation, industrial-grade PLC built around the powerful 240MHz dual-core ESP32-S3 SoC with 512k RAM and 8M Flash, combining high I/O density with advanced connectivity and flexible software-defined functionality. Equipped with WiFi, Bluetooth® Low Energy and an RJ45 Ethernet port, EQSP32CE is designed for both wireless and wired IIoT environments.

This controller features 16 universal I/O terminals, all fully configurable in software. Each terminal can operate as a digital input, solid-state output, or switch input with customizable debounce timing. For more demanding applications, pins 1 to 8 support advanced analog input modes including 0–10V voltage input (AIN), 4–20mA current loop sensors (CIN), relative analog input (RAIN), and thermistor-based temperature sensing (TIN).

Industrial communication is seamless with native RS232, RS485 (half-duplex), and CAN-Bus interfaces, enabling the implementation of widely-used industrial protocols such as Modbus RTU, DMX512, CANopen, and other custom serial protocols. This makes EQSP32CE ideal for integration into diverse industrial ecosystems.

Its modular expansion system further enhances flexibility with support for specialized add-ons including thermocouple measurement (EQXTC), PT100 RTD sensors (EQXPT), pH monitoring (EQXPH), and digital I/O (EQXIO) modules. These are seamlessly managed through an internal automatic addressing and characterization architecture, allowing effortless scaling and device mapping across installations.

The built-in MQTT integration features a predefined topic structure, making EQSP32CE instantly compatible with Node-RED workflows and enabling automatic discovery in Home Assistant—no manual configuration required. With the EQConnect mobile app, users can provision WiFi credentials, configure timezones, and monitor both I/O states and modes in real time.

EQSP32CE may be programmed via the front facing USB-C programming port, using Arduino IDE, Visual Studio Code or any other ESP32 compatible IDE. Enhanced by the intelligent EQ-AI assistant, developers can not only auto-generate setup code from wiring diagrams or plain-English descriptions but also optimize performance and debug logical or functional issues. EQ-AI provides guided support through every stage of development, from concept to deployment.

EQSP32CE offers the power and flexibility of an embedded controller, with the convenience and reliability of an industrial-grade PLC—ideal for smart automation, remote monitoring, and IIoT applications.

View datasheet.

Key Benefits of EQSP32

• Fully software-configurable I/O for maximum flexibility
• Supports 0–10V analog voltage input (AIN) on pins 1–8
• Supports 4–20mA current loop input (CIN) on pins 1–8
• Special analog modes: Relative analog input (RAIN) and temperature input (TIN) on pins 1–8
• All 16 terminals configurable as digital inputs or solid-state outputs
• Integrated RS232, RS485 (half-duplex), and CAN-Bus interfaces
• Compatible with industrial protocols such as Modbus RTU, DMX512, and CANopen
• Custom or third-party software support for any RS232, RS485, and CAN-Bus implementations
• Modular expansion system with automatic addressing and device recognition
• Built-in MQTT with predefined topics for Node-RED and auto-discovery in Home Assistant
• EQConnect mobile app for WiFi provisioning, timezone setup, and real-time I/O monitoring
• EQ-AI assistant for code generation, optimization, and debugging support
• DIN-rail mountable with screw terminals for easy installation and integration
• ESP32-S3 core with 240 MHz dual-core CPU and 8MB Flash for advanced embedded applications
• USB-C programming interface for fast and easy development access
• End-to-end solution for Industrial IoT applications
• Custom mobile application development using drag-and-drop tools like DashIO
• Real-time monitoring and control using IoT platforms or custom solutions
• Extensive community support for ESP32 applications and examples

Technical Specifications of EQSP32

Certification and Compliance

Applicable Standards for CE Compliance under Directive 2014/53/EU (RED):

EQSP32 Functional Block diagram

Support and Documentation

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