Wemos D1 R32 (ESPDuino-32)

Support for the Wemos D1 R32 (ESPDuino-32) board. More...

Detailed Description

Support for the Wemos D1 R32 (ESPDuino-32) board.

Author

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

Wemos D1 R32 board (ESPDuino-32)

Table of Contents

1. Overview
2. Hardware
   1. MCU
   2. Board Configuration
   3. Board Pinout
3. 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.

WeMos D1 R32 ESPDuino32

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

For detailed information about the configuration of ESP32 boards, see section 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.

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 RIOT-OS on ESP32 SoC Series Boards.

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Files
file	arduino_iomap.h
	Mapping from MCU pins to Arduino pins.
file	board.h
	Board specific definitions for Wemos D1 R32 (ESPDuino-32) board.
file	gpio_params.h
	Board specific configuration of direct mapped GPIOs.
file	periph_conf.h
	Peripheral MCU configuration for Wemos D1 R32 (ESPDuino-32) board.