Wiznet makers

YB-ESP32-S3-ETH board overview:

The board enables you to easily realize ESP32 projects with Ethernet or combined Ethernet/WiFi support. A collection of software examples (for PlatformIO and/or ArduinoIDE) are available on github.

The densly populated YB-ESP32-S3-ETH board provides multiple GPIO pins and is still highly breadboard compatible for it leaves one row of accessible breadboard contacts on either side of the board. All I/O ports (GPIOx) are labeled on both sides of the board.

If WiFi/BT is needed instead of or additionally to an Ethernet connection then the external 2.4GHz WLAN antenna can be connected to the onboard WROOM-1U module. The connector is compatible with the following standards: U.FL (Hirose), MHF-I (I-PEX) and AMC (Amphen).

• ESP32-S3-WROOM-1U-N8R8 module with 8MB Flash, 8MB PSRAM or ESP32-S3-WROOM-1U-N4 module with 4MB Flash or without ESP32-S3-WROOM module
• WiFi/BT IPEX antenna connector (only boards with ESP32-S3-WROOM module)
• RJ45 10M/100M Ethernet connector driven by onboard PHY controller chip Wiznet W5500
• the W5500 pins required to control the chip are hardwired to the ESP32-S3 GPIOs as follows:
  • MOSI - GPIO11, MISO - GPIO13, SCK - GPIO12 (SPI bus data communication)
  • SCS - GPIO14 (chip select, required for SPI bus control)
  • RST - GPIO21 (chip reset, needed only for chip reset without resetting the whole board)
  • INT - GPIO18 (only if solder bridge on bottom is closed, seldomly needed)
• control LEDs. One LED labeled 'P' is connected to the 3.3V rail to indicate board power and the other LED labeled 'IO47' is connected to GPIO47 which can be used as status LED, for debugging purposes etc.
• two microUSB ports. One is connected to the ESP32-S3 directly for debugging or serial output (labeled 'USB') and the other via USB-TTL bridge chip CH340 (labeled 'UART') for serial output and software upload (e.g. via ArduinoIDE, VSCode/PlatformIO etc). The ESP32-S3 contains an inbuild JTAG adapter hence debugging via port 'USB' becomes fairly easy.
• hardware logic for automatic software uploads (supported by most Development IDEs) via microUSB port labeled 'UART'.
• pushbuttons. One is labeled 'R' and resets the ESP32-S3 (shorts EN pin to ground) and the other one is labeled 'B' and shorts GPIO0 to ground when pressed. The latter is sometimes needed to force the board into boot mode.
• lots of available GPIOs next to the ones already mentioned above.

It's easy. Here you find the Eagle library file yb-esp32-s3-eth.lbr containing the board. Most other PCB design software (e.g. KiCad) are able to import and use Eagle lib files.