RIOT/boards/esp32-wemos-d1-r32/doc.md

@defgroup boards_esp32_wemos_d1_r32 Wemos D1 R32 (ESPDuino-32) @ingroup boards_esp32 @brief Support for the Wemos D1 R32 (ESPDuino-32) board @author Gunar Schorcht gunar@schorcht.net

\section esp32_wemos_d1_r32 Wemos D1 R32 board (ESPDuino-32)

Table of Contents

-# Overview -# Hardware -# MCU -# Board Configuration -# Board Pinout -# Flashing the Device

Overview

The Wemos D1 R32 board is an ESP32 board in the Arduino Uno format that uses the ESP32-WROOM-32 module. It is exactly the same board that is also known as ESPDuino-32 on the market. The board is pin compatible with the Arduino Uno board. The peripheral configuration corresponds to the Arduino Uno pinout and guaranties the compatibility with Arduino Uno Shields.

\image html "https://makerselectronics.com/wp-content/uploads/2022/09/wemos-d1-r32-w-esp32-uno-r3-pinout-1-800x800.jpg.webp" "WeMos D1 R32 ESPDuino32" width=400px

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Hardware

This section describes

• the MCU,
• the board configuration,
• the board pinout.

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MCU

Most features of the board are provided by the ESP32 SoC. For detailed information about the ESP32, see section \ref esp32_mcu_esp32 "MCU ESP32".

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Board Configuration

The board configuration guarantees that the board is compatible with Arduino Uno Shield. The board configuration provides:

• 6 x ADC channels
• 2 x DAC channels
• 2 x PWM devices with a total of 7 channels
• 1 x SPI device
• 1 x I2C device
• 2 x UART devices

The following table shows the default board configuration, which is sorted according to the defined functionality of GPIOs.

Function | GPIOs | Arduino Pin |Configuration :---------------|:-------|:------------|:---------------------------------- ADC_LINE(0) | GPIO2 | A0 | \ref esp32_adc_channels "ADC Channels" ADC_LINE(1) | GPIO4 | A1 | \ref esp32_adc_channels "ADC Channels" ADC_LINE(2) | GPIO35 | A2 | \ref esp32_adc_channels "ADC Channels" ADC_LINE(3) | GPIO34 | A3 | \ref esp32_adc_channels "ADC Channels" ADC_LINE(4) | GPIO36 | A4 | \ref esp32_adc_channels "ADC Channels" ADC_LINE(5) | GPIO39 | A5 | \ref esp32_adc_channels "ADC Channels" DAC_LINE(0) | GPIO25 | D3 | \ref esp32_pwm_channels "DAC Channels" DAC_LINE(1) | GPIO26 | D2 | \ref esp32_pwm_channels "DAC Channels" I2C_DEV(0):SDA | GPIO21 | SDA | \ref esp32_i2c_interfaces "I2C Interfaces" I2C_DEV(0):SCL | GPIO22 | SCL | \ref esp32_i2c_interfaces "I2C Interfaces" LED | GPIO2 | A0 | - PWM_DEV(0):0 | GPIO25 | D3 | \ref esp32_pwm_channels "PWM Channels" PWM_DEV(0):1 | GPIO16 | D5 | \ref esp32_pwm_channels "PWM Channels" PWM_DEV(0):2 | GPIO27 | D6 | \ref esp32_pwm_channels "PWM Channels" PWM_DEV(0):3 | GPIO13 | D9 | \ref esp32_pwm_channels "PWM Channels" PWM_DEV(0):4 | GPIO2 | A0 | \ref esp32_pwm_channels "PWM Channels" PWM_DEV(1):0 | GPIO5 | D10 | \ref esp32_pwm_channels "PWM Channels" PWM_DEV(1):1 | GPIO23 | D11 | \ref esp32_pwm_channels "PWM Channels" SPI_DEV(0):CLK | GPIO18 | D13 | \ref esp32_spi_interfaces "SPI Interfaces" SPI_DEV(0):MISO | GPIO19 | D12 | \ref esp32_spi_interfaces "SPI Interfaces" SPI_DEV(0):MOSI | GPIO23 | D11 | \ref esp32_spi_interfaces "SPI Interfaces" SPI_DEV(0):CS0 | GPIO5 | D10 | \ref esp32_spi_interfaces "SPI Interfaces" UART_DEV(0):TxD | GPIO1 | D1 | \ref esp32_uart_interfaces "UART interfaces" UART_DEV(0):RxD | GPIO3 | D0 | \ref esp32_uart_interfaces "UART interfaces" UART_DEV(1):TxD | GPIO10 | D4 | \ref esp32_uart_interfaces "UART interfaces" UART_DEV(1):RxD | GPIO9 | D5 | \ref esp32_uart_interfaces "UART interfaces" \n

For detailed information about the configuration of ESP32 boards, see section \ref esp32_peripherals "Common Peripherals".

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Board Pinout

The following figure shows the pinout of the Wemos D1 R32 board. It is exactly the same as for the ESPDuino-32 board. The corresponding board schematics can be found here.

@image html "https://makerselectronics.com/wp-content/uploads/2022/09/2_Pinout_D1_R32.png.webp" "Wemos D1 R32 ESPDuino Pinout"

@warning The pinout contains the following errors. Analog Arduino pin A2 with white label IO36 is actually ADC1 Channel7 that is connected to GPIO35 and analog Arduino pin A4 with white label IO38 is actually ADC1 Channel0 that is connected to GPIO36. That is the colored labels are correct in the pinout.

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Flashing the Device

Flashing RIOT is quite easy. The board has a Micro-USB connector with reset/boot/flash logic. Just connect the board to your host computer and type using the programming port:

make flash BOARD=esp32-wemos-d1-r32 ...

For detailed information about ESP32 as well as configuring and compiling RIOT for ESP32 boards, see \ref esp32_riot.

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