---
product_id: 41163622
title: "HiLetgo 3pcs Atmega32U4 5V 16MHz Bootloadered IDE Micro USB Development Board Microcontroller Compatible to Arduino Pro Micro Serial Connection with Pin Header"
brand: "hiletgo"
price: "$U2157"
currency: UYU
in_stock: true
reviews_count: 12
category: "Hi Letgo"
url: https://www.desertcart.uy/products/41163622-hiletgo-3pcs-atmega32u4-5v-16mhz-bootloadered-ide-micro-usb-development
store_origin: UY
region: Uruguay
---

# 16MHz high-speed clock On-board Micro-USB programming 12 digital I/O pins + 4 ADC channels HiLetgo 3pcs Atmega32U4 5V 16MHz Bootloadered IDE Micro USB Development Board Microcontroller Compatible to Arduino Pro Micro Serial Connection with Pin Header

**Brand:** hiletgo
**Price:** $U2157
**Availability:** ✅ In Stock

## Summary

> 🚀 Tiny Board, Massive Potential: Power Your Next Big Idea with Pro Micro!

## Quick Answers

- **What is this?** HiLetgo 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?** $U2157 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/41163622-hiletgo-3pcs-atmega32u4-5v-16mhz-bootloadered-ide-micro-usb-development)

## 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:** Built-in Micro-USB port eliminates bulky adapters—program directly and effortlessly.
- • **Arduino IDE Ready:** Fully compatible with Arduino IDE v1.0.1 for instant coding and prototyping.
- • **Triple Pack Value:** Get 3 boards in one set—perfect for scaling your innovative projects or sharing the tech love.
- • **Compact Powerhouse:** ATmega32U4 running at a lightning-fast 16MHz for seamless multitasking.
- • **Versatile I/O Arsenal:** 12 digital pins plus 4 analog inputs give you endless project possibilities.

## Overview

The HiLetgo Pro Micro is a compact, Arduino-compatible development board featuring the ATmega32U4 microcontroller running at 5V/16MHz. It includes an onboard Micro-USB connector for easy programming, 12 digital I/O pins, 4 channels of 10-bit ADC, and hardware serial Rx/Tx connections. Supported by Arduino IDE v1.0.1, this triple-pack set offers a versatile and cost-effective solution for professional-grade embedded projects.

## 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 | #1,534 in Single Board Computers (Computers & Accessories) |
| Brand | HiLetgo |
| Color | Blue |
| Customer Reviews | 4.4 4.4 out of 5 stars (391) |
| Date First Available | November 29, 2016 |
| Is Discontinued By Manufacturer | No |
| Item Dimensions LxWxH | 2.76 x 1.97 x 0.59 inches |
| Item Weight | 0.16 ounces |
| Item model number | 8541586627 |
| Manufacturer | HiLetgo |
| Number of Processors | 1 |
| Operating System | Linux |
| Product Dimensions | 2.76 x 1.97 x 0.59 inches |
| RAM | LPDDR3 |
| Series | Pro Micro |
| Wireless Type | 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

![HiLetgo 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)
![HiLetgo 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)
![HiLetgo 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)
![HiLetgo 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)
![HiLetgo 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.

### ⭐⭐⭐⭐ Worked as advertised with exception of Input raw voltage rating!
*by L***E on November 12, 2018*

All three were well packaged. I had no problem installing sketches straight out of box with my Mac. I will definitely purchase more of these. I was able to get 20x4 lcd with shift registers with 8 button and 8 LEDs up and functionining for midi controller project. These little boards work as advertised with the exception of the raw voltage input that it can handle. The only problem I had was when using a voltage regulator that was not functioning correctly it put 9+ volts to raw pin on board, “fried it”. These boards will not handle anything over 9 volts.

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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-02-17*