MCU Development Boards Compared: Arduino, STM32 Nucleo, ESP32, Raspberry Pi Pico

*Published: 2026-06-19 | Category: Components Guide | Author: PartsCube Global*

Popular MCU Development Boards

Customers ask us this constantly: which board should I start with? It depends on the project.

Board	MCU	Clock	RAM	Flash	Wireless	Price
Arduino Uno R3	ATmega328P	16MHz	2KB	32KB	None	$25
Arduino Nano	ATmega328P	16MHz	2KB	32KB	None	$5-8
STM32 Nucleo-F103RB	STM32F103RB	72MHz	20KB	128KB	None	$15
ESP32 DevKit V1	ESP32-WROOM-32	240MHz	520KB	4MB	WiFi+BLE	$5-10
Raspberry Pi Pico	RP2040	133MHz	264KB	2MB	None	$4
Raspberry Pi Pico W	RP2040	133MHz	264KB	2MB	WiFi	$6
Teensy 4.0	i.MX RT1062	600MHz	1MB	2MB	None	$24

Best for: Beginners, simple sensor projects, education, single-task controllers.

Pros: Largest community, thousands of libraries, anything you want to build has been done before.

Cons: Extremely limited resources by modern standards. 2KB RAM fills up fast.

When to use: Quick prototype, LED controller, simple data logger. Not for production.

Best for: Professional development, motor control, industrial applications.

Pros: ARM Cortex-M core, excellent peripherals, STM32CubeIDE is free and powerful, pin-compatible with production STM32 chips.

Cons: Steeper learning curve than Arduino. Less beginner-friendly documentation.

When to use: Product development targeting STM32 for production. Motor control, power supplies, medical devices.

Best for: IoT projects, WiFi/Bluetooth prototypes, cost-sensitive wireless products.

Pros: Built-in WiFi and Bluetooth, Arduino-compatible, incredible value at $5-10.

Cons: ADC is non-linear (known issue), power consumption higher than advertised, some ESP-IDF APIs are poorly documented.

When to use: Any project needing WiFi or Bluetooth. IoT sensor node, smart home device.

Best for: Low-cost embedded projects, education, simple automation.

Pros: Ultra-low cost ($4), PIO (Programmable I/O) is unique and powerful, good documentation.

Cons: No WiFi on base model, RP2040 is less powerful than ESP32, no floating point unit.

When to use: Cost-sensitive embedded projects, replacing Arduino in production, learning embedded programming.

Our default for most customers: the ESP32 DevKit. Wireless built in, cheap enough to stock spares.

Need components for your prototype? PartsCube Global sources MCUs, sensors, and passives for development and production.