---
product_id: 41163622
title: "3pcs Atmega32U4 5V 16MHz Bootloadered IDE Micro USB Development Board Microcontroller Compatible to Arduino Pro Micro Serial Connection with Pin Header"
brand: "hiletgo"
price: "¥6920"
currency: JPY
in_stock: true
reviews_count: 13
category: "Hi Letgo"
url: https://www.desertcart.jp/products/41163622-3pcs-atmega32u4-5v-16mhz-bootloadered-ide-micro-usb-development-board
store_origin: JP
region: Japan
---

# 5V/16MHz high-speed MCU On-board Micro-USB programming 4x 10-bit ADC + 12 Digital I/Os 3pcs Atmega32U4 5V 16MHz Bootloadered IDE Micro USB Development Board Microcontroller Compatible to Arduino Pro Micro Serial Connection with Pin Header

**Brand:** hiletgo
**Price:** ¥6920
**Availability:** ✅ In Stock

## Summary

> 🚀 Tiny Board, Massive Potential: Power Your Next-Level Arduino Creations!

## Quick Answers

- **What is this?** 3pcs Atmega32U4 5V 16MHz Bootloadered IDE Micro USB Development Board Microcontroller Compatible to Arduino Pro Micro Serial Connection with Pin Header by hiletgo
- **How much does it cost?** ¥6920 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/41163622-3pcs-atmega32u4-5v-16mhz-bootloadered-ide-micro-usb-development-board)

## Best For

- hiletgo enthusiasts

## Why This Product

- Trusted hiletgo brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Plug & Play USB:** Integrated Micro-USB connector eliminates bulky adapters—program and power your board with a single cable.
- • **Arduino IDE Ready:** Fully compatible with Arduino IDE v1.0.1 and above, enabling rapid prototyping with familiar tools.
- • **Triple Pack Value:** Get three bootloadered Pro Micro boards in one set—perfect for scaling your innovative projects or sharing with your dev squad.
- • **Compact Powerhouse:** ATmega32U4 MCU running at a lightning-fast 16MHz with stable 5V operation for seamless project performance.
- • **Versatile I/O Arsenal:** Access 4 analog inputs and 12 digital pins, plus dedicated Rx/Tx hardware serial ports for complex communication.

## Overview

The HiLetgo Pro Micro features an ATmega32U4 microcontroller running at 5V and 16MHz, equipped with an onboard Micro-USB port for easy programming. It offers 4 channels of 10-bit ADC, 12 digital I/O pins, and dedicated hardware serial connections (Rx/Tx), all fully compatible with the Arduino IDE. This triple-pack bundle delivers compact, versatile development boards ideal for professional-grade embedded projects and rapid prototyping.

## Description

Description: 1. The Pro Micro is similar to the Pro mini except with a ATmega32U4 on board. The USB transceiver inside the 32U4 allows us to add USB connectivity on board and do away with bulky external USB interface. 2. This tiny little board does all of the neat-o Arduino tricks that you're familiar with: 4 channels of 10-bit ADC, 5 PWM pins, 12 DIOs as well as hardware serial connections Rx and Tx. Running at 16MHz and 5V, this board will remind you a lot of your other favorite Arduino-compatible boards but this little guy can go just about anywhere. If you're supplying unregulated power to the board, be sure to connect to the "RAW" pin on not VCC. Features: ATmega32U4 running at 5V/16MHz Supported by Arduino IDE v1.0.1 On-Board Micro-USB connector for programming 4 x 10-bit ADC pins, 12 x Digital I/Os Rx and Tx Hardware Serial Connections Note: 1.When you open the Arduino IDE software, pls go to the tool and choose the board "Arduino Leonardo" 2.The acceptable voltage range is 5 to 9 V.Package included: 3* Pro Micro ATmega32U4 5V/16MHz Development Board

Review: Works well for me. - All three units functioned well. At first, I had a problem with my old Windows 7 computer recognizing the device. I was able to upload a sketch to it, and once I had done that, then the computer located the proper device driver for it. Not sure how that worked, but it did. They all worked fine with a Windows 10 computer. I was able to run a few simple programs, including one emulating a USB keyboard. One thing to note, when writing a sketch to output to the UART, you must use serial1.begin() (and associated serial1.xxx functions) not serial.begin(); The USB port does NOT share the UART pins as is the case on a UNO. If you have code that writes to the USB port, the program will not run until you open the serial monitor. If you write to the UART, it will run regardless of whether you have anything connected to the USB port or UART pins, but the output will only go to the UART pins.
Review: Great value, but a few things to note about these modules: LEDs and USB troubles - For the value these are great little Arduino compatible Leonardo Atmel32u4 boards. I wish there were a schematic for them. Then I'd know that the LED typically on pin 13 is actually on pin 17, and a bonus LED on pin 30. (Thanks to other commenters for the heads up on that) Another problem I ran into: When programming these modules I got my LED blink test code to work then suddenly, without any warning, ~10 seconds later, I got an error message on my PC telling me that the device's USB had failed. Sure enough I couldn't download code to the module; however, I knew that the module didn't fail, it was still running running my LED blink code. The PC didn't recognize the device no matter what I did like unplug and plug it back in... it would make the USB connect and disconnect sounds, then display the error message again. To solve this problem, at least this worked for me so it's worth trying, connect to a different USB port on your PC, like I said, I have a USB hub; however that's not good enough to switch to a different one on the hub. You need to go to a completely different USB port on the computer... directly to the PC if possible. It should register this time without a problem, then, using the Arduino IDE, change the port number and it connected right up and I was able to program my modules again. I speculate, but there could be an issue with the USB and hubs, other devices plugged into the hub, I don't know. Anyway it's a great board at a great value, I plan to pick some more of these soon.

## Features

- ATmega32U4 running at 5V/16MHz
- Supported by Arduino IDE v1.0.1
- On-Board Micro-USB connector for programming
- 4 x 10-bit ADC pins, 12 x Digital I/Os
- Rx and Tx Hardware Serial Connections

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01MTU9GOB |
| Best Sellers Rank | #1,200 in Single Board Computers (Computers & Accessories) |
| Brand | HiLetgo |
| Built-In Media | 3 Pro Micro ATmega32U4 5V/16MHz Development Boards |
| Compatible Devices | Arduino devices, Arduino IDE |
| Connectivity Technology | USB |
| Customer Reviews | 4.4 out of 5 stars 390 Reviews |
| Global Trade Identification Number | 07753681473658 |
| Included Components | 3 Pro Micro ATmega32U4 5V/16MHz Development Boards |
| Item Dimensions L x W x H | 2.76"L x 1.97"W x 0.59"H |
| Item Weight | 0.01 Pounds |
| Manufacturer | HiLetgo |
| Mfr Part Number | 3-01-1254-UK-3PCS |
| Model Name | Pro Micro |
| Model Number | 8541586627 |
| Operating System | Linux |
| Processor Count | 1 |
| RAM Memory Technology | LPDDR3 |
| Total Usb Ports | 1 |
| Wireless Communication Standard | 802.11b |
| Wireless Compability | 802.11b |

## Product Details

- **Brand:** HiLetgo
- **Connectivity Technology:** USB
- **Included Components:** 3 Pro Micro ATmega32U4 5V/16MHz Development Boards
- **Model Name:** Pro Micro
- **Operating System:** Linux

## Images

![3pcs Atmega32U4 5V 16MHz Bootloadered IDE Micro USB Development Board Microcontroller Compatible to Arduino Pro Micro Serial Connection with Pin Header - Image 1](https://m.media-amazon.com/images/I/71LuBvfQ7YL.jpg)
![3pcs Atmega32U4 5V 16MHz Bootloadered IDE Micro USB Development Board Microcontroller Compatible to Arduino Pro Micro Serial Connection with Pin Header - Image 2](https://m.media-amazon.com/images/I/61uFap5JlqL.jpg)
![3pcs Atmega32U4 5V 16MHz Bootloadered IDE Micro USB Development Board Microcontroller Compatible to Arduino Pro Micro Serial Connection with Pin Header - Image 3](https://m.media-amazon.com/images/I/61JWwtptNEL.jpg)
![3pcs Atmega32U4 5V 16MHz Bootloadered IDE Micro USB Development Board Microcontroller Compatible to Arduino Pro Micro Serial Connection with Pin Header - Image 4](https://m.media-amazon.com/images/I/61qEufMfgPL.jpg)
![3pcs Atmega32U4 5V 16MHz Bootloadered IDE Micro USB Development Board Microcontroller Compatible to Arduino Pro Micro Serial Connection with Pin Header - Image 5](https://m.media-amazon.com/images/I/612N5t5XfIL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works well for me.
*by M***Y on March 25, 2024*

All three units functioned well. At first, I had a problem with my old Windows 7 computer recognizing the device. I was able to upload a sketch to it, and once I had done that, then the computer located the proper device driver for it. Not sure how that worked, but it did. They all worked fine with a Windows 10 computer. I was able to run a few simple programs, including one emulating a USB keyboard. One thing to note, when writing a sketch to output to the UART, you must use serial1.begin() (and associated serial1.xxx functions) not serial.begin(); The USB port does NOT share the UART pins as is the case on a UNO. If you have code that writes to the USB port, the program will not run until you open the serial monitor. If you write to the UART, it will run regardless of whether you have anything connected to the USB port or UART pins, but the output will only go to the UART pins.

### ⭐⭐⭐⭐⭐ Great value, but a few things to note about these modules: LEDs and USB troubles
*by R***. on March 4, 2024*

For the value these are great little Arduino compatible Leonardo Atmel32u4 boards. I wish there were a schematic for them. Then I'd know that the LED typically on pin 13 is actually on pin 17, and a bonus LED on pin 30. (Thanks to other commenters for the heads up on that) Another problem I ran into: When programming these modules I got my LED blink test code to work then suddenly, without any warning, ~10 seconds later, I got an error message on my PC telling me that the device's USB had failed. Sure enough I couldn't download code to the module; however, I knew that the module didn't fail, it was still running running my LED blink code. The PC didn't recognize the device no matter what I did like unplug and plug it back in... it would make the USB connect and disconnect sounds, then display the error message again. To solve this problem, at least this worked for me so it's worth trying, connect to a different USB port on your PC, like I said, I have a USB hub; however that's not good enough to switch to a different one on the hub. You need to go to a completely different USB port on the computer... directly to the PC if possible. It should register this time without a problem, then, using the Arduino IDE, change the port number and it connected right up and I was able to program my modules again. I speculate, but there could be an issue with the USB and hubs, other devices plugged into the hub, I don't know. Anyway it's a great board at a great value, I plan to pick some more of these soon.

### ⭐⭐⭐⭐⭐ It survived me with a soldering gun, so it's got some quality.
*by C***R on April 3, 2021*

Poor eyesight, shaky hands, and not much experience makes me a danger to any circuit or wire I come at with a soldering gun. Well, I decided my Sim Racing rig needed a new button box with digital encoders, so I needed one of these guys to achieve that. The last set I purchased of the Nano style (ATmega328) had the pins already pre-soldered to the boards, so I could just slide female wire ends to them and be on my way. These however, do not have the pins pre-attached. So, grabbing a base with clips and magnifying glass, I set to work. I did my best to flow over the pins properly, without blobbing over to any adjacent ones. Once, I was finished, I connected my wires, plugged in a USB cable, and prayed. Low and behold, everything worked! First try, even! So these automatically get my full seal of approval. If they can survive my electrical engineering skills, they can probably survive World War 3, and be used to re-build society with. So, you should probably stock up on a few.

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-06-13*