Waveshare ESP32-S3-POE-ETH-8DI-8DO

Overview

The Waveshare ESP32-S3-POE-ETH-8DI-8DO is a full-featured industrial IoT controller combining the ESP32-S3 with extensive I/O, wired and wireless networking, and industrial communication interfaces. It is designed for building management, factory automation, and industrial monitoring applications where reliability and isolation are critical.

The board provides 8 optocoupler-isolated digital inputs accepting 5-36V signals (supporting both PNP and NPN sensors) and 8 Darlington transistor open-collector outputs capable of sinking up to 500mA per channel — enough to directly drive relays, solenoids, and indicator lights. All I/O channels are fully isolated from the main processor for protection against industrial-grade electrical noise.

Networking is handled through a W5500-based 10/100 Mbps Ethernet port with IEEE 802.3af PoE support, providing both data and power over a single cable. Additional communication options include isolated RS-485 (with TVS surge protection), isolated CAN bus, WiFi 802.11 b/g/n, and Bluetooth LE 5.0. A TF card slot, RTC with battery backup, buzzer, and WS2812 RGB LED round out the feature set, all housed in a DIN rail-mountable ABS enclosure.