Waveshare ESP32-S3-RS485-CAN

Overview

The Waveshare ESP32-S3-RS485-CAN is an industrial-grade control board designed for IIoT and automation applications. It combines the ESP32-S3 dual-core processor with isolated RS-485 and CAN bus communication interfaces, all housed in a DIN rail-mountable ABS enclosure measuring 91.6 x 23.3 x 58.7mm.

The board features multiple layers of protection including optocoupler digital isolation, TVS surge protection on both RS-485 and CAN interfaces, and onboard power supply isolation. The 7-36V wide voltage input via screw terminal makes it suitable for industrial power environments, while USB-C provides a 5V alternative for development.

Additional features include a PCF85063 RTC with backup battery header for scheduled tasks, 120 ohm termination resistors (jumper-selectable) on both RS-485 and CAN, and LED indicators for power, transmit, and receive status. Two GPIO pins are broken out to screw terminals for connecting external sensors or actuators. WiFi and Bluetooth connectivity enable web-based control and data visualization through mobile or PC browsers.