SparkFun ESP32 MicroMod

Development Board

Code name: ESP32_MICROMOD

ESP32

SparkFun ESP32 MicroMod 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 SparkFun ESP32 MicroMod

ESP32 processor board for the MicroMod ecosystem - ideal for modular embedded development.

Technical Specifications

Complete technical specification details for SparkFun ESP32 MicroMod

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 40

Analog Input 16

PWM 21

Interrupts 16

Quick Setup

Copy-paste configs for SparkFun ESP32 MicroMod - auto‑generated from this board's exact hardware specs.

ESP32 240 MHz 4MB DIO Xtensa

In Arduino IDE 2 select Esp32 Micromod from the esp32 by Espressif package. In PlatformIO use board = esp32dev. ESP32 · 240 MHz · 4MB · DIO.

Tools menu settings

Board (select in Arduino IDE) Esp32 Micromod

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 "Esp32 Micromod" for the SparkFun ESP32 MicroMod.

platformio.ini


[env:esp32micromod]
platform  = espressif32
board     = esp32dev
framework = arduino

; Exact hardware config for SparkFun ESP32 MicroMod
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"

# SparkFun ESP32 MicroMod - 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

Useful Links

Datasheets and resources for SparkFun ESP32 MicroMod

ESP32 Datasheet

Microcontroller reference

Pin Mappings

Complete pinout and GPIO mapping for SparkFun ESP32 MicroMod

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	LED_BUILTIN
3			PWM	RX
4		T0	PWM	I2C_INT
5			PWM	SS
12		T5	PWM1 PWM
13		T4	PWM0 PWM
14		T6	PWM
15		T3	PWM	G0
16			PWM	RX1 G4 AUD_IN
17			PWM	TX1 G3 AUD_OUT
18			PWM	SCK
19			PWM	MISO
21			PWM	SDA
22			PWM	SCL
23			PWM	MOSI
25			PWM	SCL1 G1 AUD_LRCLK DAC1
26			PWM	SDA1 G2 AUD_BCLK DAC2
27		T7	PWM
32		T9	PWM	G5
33		T8	PWM	G6
34	A0
35	A1
39				BATT_VIN

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 SparkFun ESP32 MicroMod

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)