ESP32-Ethernet-Kit V1.2 Board

Support for for Espressif ESP32-Ethernet-Kit V1.2.

Support for for Espressif ESP32-Ethernet-Kit V1.2.

Author

Gunar Schorcht gunar.nosp@m.@sch.nosp@m.orcht.nosp@m..net

Erik Ekman eekma.nosp@m.n@go.nosp@m.ogle..nosp@m.com

Espressif ESP32-Ethernet-Kit v1.2

Table of Contents

1. Overview
2. Hardware
   1. Board Configuration
   2. Board Pinout
3. Other Documentation Resources

Overview

The Espressif ESP32-Ethernet-Kit is a development board that uses the ESP32-WROVER-E module. Most important features of the board are

• 100 Mbps Ethernet via IP101G PHY
• USB bridge with JTAG interface

Furthermore, some GPIOs are broken out for extension. The USB bridge based on FDI FT2232HL provides a JTAG interface for OCD debugging through the USB interface. For flashing and debugging the board, see ESP32-Ethernet-Kit common board documentation.

ESP32-Ethernet-Kit V1.2

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Hardware

This section describes

• the default board configuration,
• the board pinout.

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Board Configuration

ESP32-Ethernet-Kit v1.2 has the following on-board components

• 100 Mbps Ethernet via IP101G PHY
• USB bridge with JTAG interface

For detailed information about the configuration of ESP32 boards, see section Peripherals in RIOT-OS on ESP32 SoC Series Boards.

Note

Only a few GPIOs are broken out and available for external hardware on ESP32-Ethernet-Kit boards. Which GPIOs are available as peripherals depends on used modules.

Function	GPIOs	Remarks	Configuration
BTN0	GPIO0	not available if esp_eth is used
ADC	GPIO34, GPIO35, GPIO36, GPIO39		ADC Channels
DAC	-		DAC Channels
PWM_DEV(0)	GPIO2, GPIO4		PWM Channels
I2C_DEV(0):SDA	GPIO32		I2C Interfaces
I2C_DEV(0):SCL	GPIO33		I2C Interfaces
SPI_DEV(0):CLK	GPIO14	HSPI is used	SPI Interfaces
SPI_DEV(0):MISO	GPIO12	HSPI is used	SPI Interfaces
SPI_DEV(0):MOSI	GPIO13	HSPI is used	SPI Interfaces
SPI_DEV(0):CS0	GPIO15	HSPI is used	SPI Interfaces
UART_DEV(0):TxD	GPIO1	Console (configuration is fixed)	UART interfaces
UART_DEV(0):RxD	GPIO3	Console (configuration is fixed)	UART interfaces

Note

SPI_DEV(0) is not available if module esp_jtag is used. For the SPI_DEV(0) pins to work properly, the function switches (DIP switches) for the JTAG signals must be set to OFF.

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Board Pinout

The board schematic can be found here.

By default, only 4 bidirectional GPIO pins are unused: GPIO2, GPIO4, GPIO32, GPIO33. The suggested configuration is for PWM and I2C, but they can also be used for SPI or another serial port. By disabling the JTAG interface on the board, another 4 GPIOs can be made available (GPIO12, GPIO13, GPIO14, GPIO15).

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Other Documentation Resources

There is a comprehensive Getting Started Guide for the ESP32-Ethernet-Kit with a lot information about hardware configuration.

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