Microduino-CoreESP32

Development Board

Code name: CoreESP32

ESP32

Microduino-CoreESP32 is a development board based on the ESP32 microcontroller using XTENSA architecture.

This board features a maximum CPU frequency of 240 MHz and 4MB flash memory.

About Microduino-CoreESP32

Stackable ESP32 board in Microduino form - perfect for modular electronics projects and classroom use.

Technical Specifications

Complete technical specification details for Microduino-CoreESP32

Connectivity

WiFi 802.11 b/g/n (2.4 GHz)

Bluetooth 4.2

BLE 4.2

Microcontroller

Model esp32

Clock Speed 240 MHz

Flash Size 4MB

Architecture xtensa

✨ Features & Pins

Digital IO 22

Analog Input 12

PWM 21

Interrupts 16

Download Full Datasheet

Quick Setup

Copy-paste configs for Microduino-CoreESP32 - auto‑generated from this board's exact hardware specs.

ESP32 240 MHz 4MB DIO Xtensa

In Arduino IDE 2 select Coreesp32 from the esp32 by Espressif package. In PlatformIO use board = esp32dev. ESP32 · 240 MHz · 4MB · DIO.

Tools menu settings

Board (select in Arduino IDE) Coreesp32

CPU Frequency 240 MHz

Flash Size 4MB

Flash Mode DIO

Upload Speed 921600

Architecture Xtensa

In Arduino IDE 2, open Boards Manager, search "esp32" by Espressif and install it. Then go to Tools → Board and select "Coreesp32" for the Microduino-CoreESP32.

platformio.ini


[env:CoreESP32]
platform  = espressif32
board     = esp32dev
framework = arduino

; Exact hardware config for Microduino-CoreESP32
board_build.mcu        = esp32
board_build.f_cpu      = 240000000L
board_build.flash_size = 4MB
board_build.flash_mode = dio
board_upload.flash_size = 4MB

The board value is a close generic match - check PlatformIO board registry for an exact fit.

esp32: block (YAML)


esp32:
  board: esp32dev
  framework:
    type: arduino   # or "esp-idf"

# Microduino-CoreESP32 - 240 MHz ESP32
# Flash: 4MB | USB: N/A

Paste into your device's .yaml. See ESPHome ESP32 docs for full options.

esptool.py - flash command


esptool.py \
  --chip esp32 \
  --baud 921600 \
  write_flash \
    --flash_mode dio \
    --flash_size 4MB \
    0x1000 bootloader.bin \
    0x8000    partitions.bin \
    0xe000    boot_app0.bin \
    0x10000   firmware.bin

Install: pip install esptool - replace firmware.bin with your binary - bootloader at 0x1000

Microduino-CoreESP32 Pinout Diagram

Complete pin reference for Microduino-CoreESP32

Useful Links

Datasheets and resources for Microduino-CoreESP32

Board Datasheet

Technical specifications

ESP32 Datasheet

Microcontroller reference

Pin Mappings

Complete pinout and GPIO mapping for Microduino-CoreESP32

Digital I/O Pins

Interrupt Pins

Analog Inputs

PWM Pins

Pin	Analog	Touch	PWM	Other
0		T1
1			PWM	TX WIRE1_PIN_DEFINED
2		T2	PWM
3			PWM	RX
4	A3	T0	PWM
5			PWM	SS
12	A0	T5	PWM	MTDI SDA1
13	A1	T4	PWM	MTCK SCL1
14	A13	T6	PWM	MTMS
15	A2	T3	PWM	MTDO
16			PWM
17			PWM
18			PWM	SCK
19			PWM	MISO
21			PWM
22			PWM
23			PWM	MOSI
25	A10		PWM	DAC1
26	A11		PWM	DAC2
27	A12	T7	PWM
32	A8	T9	PWM
33	A9	T8	PWM
37	A7
38	A6
-1				LED_BUILTIN
22//23;				SDA
21//19;				SCL
32//ADC1_CH4
33//ADC1_CH5
25//ADC2_CH8
26//ADC2_CH9
27//ADC2_CH7
14//ADC2_CH6

Legend

A0 Analog input

T0 Touch sensor

PWM PWM capable

RX/TX Serial pins

LED Built-in LED

# Pin number

Default Tools & Configuration

Build and upload settings for Microduino-CoreESP32

Setting	Value
Bootloader tool	esptool_py
Uploader tool	esptool_py
Network uploader tool	esp_ota
Bootloader address	`0x1000`
Flash mode	dio
Boot mode	dio
Maximum upload size	1280 KB (1310720 bytes)
Maximum data size	320 KB (327680 bytes)