# Waveshare ESP32-S3-POE-ETH-8DI-8DO > Industrial ESP32-S3 controller with 8-channel optocoupler-isolated digital inputs (5-36V), 8-channel Darlington outputs (500mA each), PoE Ethernet (W5500), isolated RS-485 and CAN bus, RTC, and DIN rail enclosure. ## Quick Facts - **Brand:** Waveshare - **Board Type:** dev-board - **Price:** ~$42.99 - **Product Readiness:** consumer - **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector instructions - **CPU Architecture:** Xtensa LX7 - **CPU Cores:** 2 - **RAM:** 512KB SRAM - **PSRAM:** 8MB - **Flash:** 16MB - **USB:** USB-C - **Power:** PoE 802.3af / 7-36V DC / 5V USB-C - **Operating Voltage:** 3.3V - **Dimensions:** 175 x 90 x 40mm - **Weight:** 321g - **Antenna:** SMA female (2.4GHz 4dB antenna included) - **SD Card:** microSD ## Connectivity - **Wifi:** 802.11 b/g/n - **Bluetooth:** BLE 5.0 - **Ethernet:** 10/100 Mbps (W5500, PoE 802.3af) ## Open Source - **Firmware:** No - **Schematics:** No - **PCB Layout:** No ## Compatible Firmware arduino, esp-idf ## Use Cases - industrial-iot - plc-replacement - building-management - poe-iot-gateway - industrial-automation - home-automation ## Components - **ESP32-S3-WROOM-1U-N16R8** (mcu): Espressif ESP32-S3-WROOM-1U module with Xtensa LX7 dual-core @ 240MHz, 16MB flash, 8MB PSRAM, U.FL antenna connector — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3-wroom-1_wroom-1u_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-poe-eth-8di-8do&source=md-export) - **W5500** (ethernet-phy): WIZnet W5500 hardwired TCP/IP Ethernet controller with SPI interface, 10/100 Mbps, 8 simultaneous sockets — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wiznet.io%2Fwp-content%2Fuploads%2Fwiznethome%2FChip%2FW5500%2FDocuments%2FW5500_ds_v110e.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-poe-eth-8di-8do&source=md-export) - **TCA9554PWR** (io-expander): Texas Instruments TCA9554PWR 8-bit I2C GPIO expander controlling the 8 digital output channels — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Ftca9554.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-poe-eth-8di-8do&source=md-export) - **PCF85063** (rtc): NXP PCF85063 real-time clock with 1220 rechargeable battery backup for scheduled automation tasks — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FPCF85063A.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-poe-eth-8di-8do&source=md-export) - **WS2812B** (led-driver): WS2812 addressable RGB LED for visual status indication — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-poe-eth-8di-8do&source=md-export) ## Protocols - **SPI** - **RS-485** - **CAN** - **I2C** ## GPIO Map | Pin | Name | Type | Functions | |-----|------|------|-----------| | GPIO0 | BOOT button | — | digital-input, strapping | | GPIO2 | CAN TX | CAN | digital-input, digital-output | | GPIO3 | CAN RX | CAN | digital-input, digital-output | | GPIO4 | DI_CH1 (digital input) | — | digital-input | | GPIO5 | DI_CH2 (digital input) | — | digital-input | | GPIO6 | DI_CH3 (digital input) | — | digital-input | | GPIO7 | DI_CH4 (digital input) | — | digital-input | | GPIO8 | DI_CH5 (digital input) | — | digital-input | | GPIO9 | DI_CH6 (digital input) | — | digital-input | | GPIO10 | DI_CH7 (digital input) | — | digital-input | | GPIO11 | DI_CH8 (digital input) | — | digital-input | | GPIO12 | ETH_INT | SPI | digital-input | | GPIO13 | ETH_MOSI | SPI | digital-output | | GPIO14 | ETH_MISO | SPI | digital-input | | GPIO15 | ETH_SCLK | SPI | digital-output | | GPIO16 | ETH_CS | SPI | digital-output | | GPIO17 | RS-485 TX | UART | digital-output | | GPIO18 | RS-485 RX | UART | digital-input | | GPIO21 | RS-485 RTS | — | digital-output | | GPIO38 | WS2812 RGB LED data | — | digital-output | | GPIO39 | ETH_RST | — | digital-output | | GPIO40 | RTC_INT | — | digital-input | | GPIO41 | I2C SCL | I2C | digital-input, digital-output | | GPIO42 | I2C SDA | I2C | digital-input, digital-output | | GPIO45 | SD_D0 | SPI | digital-input, digital-output | | GPIO46 | Buzzer control | — | digital-output | | GPIO47 | SD_CMD | SPI | digital-input, digital-output | | GPIO48 | SD_SCK | SPI | digital-output | ## Description ## 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. ## Where to Buy - [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-s3-poe-eth-8di-8do.htm&ref=openhardware.directory&product=waveshare-esp32-s3-poe-eth-8di-8do&source=md-export) — $42.99 ## Resources - [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-s3-poe-eth-8di-8do.htm&ref=openhardware.directory&product=waveshare-esp32-s3-poe-eth-8di-8do&source=md-export) - [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FVolosR%2FwaveshareControl&ref=openhardware.directory&product=waveshare-esp32-s3-poe-eth-8di-8do&source=md-export) - [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-S3-POE-ETH-8DI-8DO&ref=openhardware.directory&product=waveshare-esp32-s3-poe-eth-8di-8do&source=md-export) - [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-poe-eth-8di-8do&source=md-export) ## Tags `esp32-s3`, `poe`, `ethernet`, `w5500`, `digital-io`, `industrial`, `din-rail`, `rs485`, `can-bus`, `optocoupler`, `waveshare` ## Images ![Waveshare ESP32-S3-POE-ETH-8DI-8DO](https://nbg1.your-objectstorage.com/openhardware-directory/entities/waveshare-esp32-s3-poe-eth-8di-8do/1d8389c3a9d5.jpg) ![Waveshare ESP32-S3-POE-ETH-8DI-8DO](https://nbg1.your-objectstorage.com/openhardware-directory/entities/waveshare-esp32-s3-poe-eth-8di-8do/df2d4611455d.jpg) --- [View full device page](https://openhardware.directory/devices/waveshare-esp32-s3-poe-eth-8di-8do)