---
product_id: 415119473
title: "Seeeduino XIAO"
brand: "seeed studio"
price: "€ 50.89"
currency: EUR
in_stock: true
reviews_count: 5
category: "Seeed Studio"
url: https://www.desertcart.com.cy/products/415119473-seeeduino-xiao
store_origin: CY
region: Cyprus
---

# 48MHz ARM Cortex-M0+ CPU 256KB Flash + 32KB SRAM memory 14 GPIO pins with multi-protocol support Seeeduino XIAO

**Brand:** seeed studio
**Price:** € 50.89
**Availability:** ✅ In Stock

## Summary

> 🚀 Tiny Tech, Massive Impact — Power Your Innovation Anywhere!

## Quick Answers

- **What is this?** Seeeduino XIAO by seeed studio
- **How much does it cost?** € 50.89 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/415119473-seeeduino-xiao)

## Best For

- seeed studio enthusiasts

## Why This Product

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

## Key Features

- • **Arduino IDE Ready:** Plug-and-play compatibility with extensive Arduino libraries accelerates prototyping.
- • **Compact Powerhouse:** Tiny 20x17.5mm footprint fits anywhere — your projects, your style.
- • **Versatile Connectivity:** Supports UART, I2C, SPI, and USB Type-C for ultimate device integration.
- • **Blazing Fast Processing:** 3x speed of Arduino Uno/Nano for seamless multitasking and precise timing.
- • **Wearable & Portable Perfect:** Low power consumption meets high performance for next-gen wearable tech.

## Overview

The Seeeduino XIAO is the smallest Arduino-compatible microcontroller board featuring a 48MHz ARM Cortex-M0+ CPU, 256KB flash memory, and 32KB SRAM. Despite its thumb-sized form factor, it offers 14 GPIO pins with analog and digital channels, plus UART, I2C, SPI, and USB Type-C interfaces. Fully compatible with Arduino IDE, it’s ideal for rapid prototyping, wearable devices, and compact DIY projects demanding speed, versatility, and low power.

## Description

Seeed Studio Seeeduino XIAO SAMD21 Smallest Arduino Microcontroller with Rich Interface 100% Arduino IDE Compatible for Portable Devices and Small Projects 1 Pc: desertcart.co.uk: DIY & Tools

Review: I bought 3 of these a couple years ago to play around with. At the time, it was just because they were cheap and quick to get on desertcart. I quickly fell in love. Though they aren't perfect. Pros: Size. They're tiny. Even 2 years on, most microcontrollers are *at least* 2 to 4 times the size. The small size makes them easy to fit into almost any project. They're literally the size of a postage stamp. I can cover one with my finger. Which brings me to the next pro: I/O. Even at this tiny size, you still have tons of I/O, with support for hardware interrupts, UART, I2C, SPI, and true analog pins with DAC. The big one for me, though, is HID support through the USB type C port. That's a much less common feature than you'd think. If you want to make devices that can talk to other devices as an input device, you need this. Speed. You don't really think that a simple Arduino device needs to be fast, but having a 48mhz processor and 32mb of SRAM to work with open up a LOT of possibilities. Take, for example, my most recent project. I wanted to make a vintage laptop keyboard work with a modern laptop motherboard. But I wanted to do so without damaging the original keyboard. So to interface the two, I needed the Xiao to be able to read the PS/2 protocol that the keyboard was talking in, and give USB HID protocol commands to the computer. Reading the PS/2 protocol takes very precise timing. Your code has to execute within a certain number of microseconds, otherwise the command will fail. Because of the speed of the processor, I could have more code executing in the interrupts while still staying under the threshold. Cons: Storage. While I've never run up against the limit, the Xiao has 256 kB of flash memory. That's not the smallest, but it's certainly not the biggest I've seen on a microcontroller. So I do get a little nervous when I start importing a bunch of libraries. So far, my most involved project, the keyboard that I talked about earlier, only uses about 25% of that storage. And that's importing two different libraries plus my custom code. But if you have a large project that takes many libraries or a whole lot of code, you might run into problems with storage. Bootloader Corruption. I've only had it happen once and it was after hundreds upon hundreds of code uploads. These guys saying they're bricking after 50 uploads have to be doing something wrong. Or maybe it's because they're on Mac hardware, I don't know. But I've had to upload 50 times pretty much everyday I've worked on this project and so far it's not been a problem. But like I said, I did have one of my original three stop responding to USB. So the problem does exist. The device itself still does what the last upload of code told it to do, but I can no longer get it to talk with the Arduino software. And resetting the unit didn't resolve it. So you're mileage may vary.
Review: Very satisfied with the purchase, all 3 SAMD21 board tested and confirmed working. I will be able to prototype easily with these spare boards

## Features

- 🌱【Powerful CPU】 The Seeeduino XIAO is equipped with an ARM Cortex-M0+ 32bit 48MHz microcontroller, which is three times faster than Arduino Uno and Arduino Nano. Furthermore, this Arduino IDE compatible board Xiao has 256KB flash memory and 32KB SRAM.
- 🌱【Rich Interfaces in a Tiny Size】 The device has 14 GPIO pins, each of which has 11 analog channels, 11 digital channels, I2C*1, UART*1, and SPI*1, USB Type-C interface*1 in a tiny space, just 20mm*17.5mm (about the size of your thumb). Seeeduino XIAO is the smallest Arduino compatible board in the Seeeduino series.
- 🌱【Fully compatible with Arduino IDE】 Seeeduino XIAO development board is perfectly compatible with Arduino IDE and you can easily create small projects using the extensive and comprehensive Arduino library. It has a 2.54mm pin pitch and can be used even when inserted into a breadboard because it is an Arduino microcontroller.It has a 2.54mm pin pitch and can be used even when inserted into a breadboard because it is an Arduino microcontroller.
- 🌱【Applications】 Seeeduino XIAO is suitable for Wearable devices, Rapid prototyping, DIY keyboard, USB to multi-channel TTL/USB host mode, etc.
- 🌱【Perfect for Wearable and Tiny Arduino Projects】 This microcontroller has good performance in processing but needs less power. As a matter of fact, it is designed in a tiny size and can be used for Arduino wearable devices and small projects.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B08GJT33MD |
| Best Sellers Rank | 174,462 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 613 in Microcontrollers |
| Customer reviews | 4.4 4.4 out of 5 stars (694) |
| Date First Available  | 15 July 2020 |
| Manufacturer  | seeed studio |

## Product Details

- **Brand:** seeed studio
- **CPU Speed:** 48 MHz
- **Memory Storage Capacity:** 256 KB
- **Model Name:** Seeed Studio XIAO SAMD21
- **Ram Memory Installed Size:** 32 GB

## Images

![Seeeduino XIAO - Image 1](https://m.media-amazon.com/images/I/31OHkVaPzjL.jpg)
![Seeeduino XIAO - Image 2](https://m.media-amazon.com/images/I/416D93opjjL.jpg)
![Seeeduino XIAO - Image 3](https://m.media-amazon.com/images/I/41YRdI+TgXL.jpg)
![Seeeduino XIAO - Image 4](https://m.media-amazon.com/images/I/41oVSvk-BoL.jpg)
![Seeeduino XIAO - Image 5](https://m.media-amazon.com/images/I/41tj7CCddFL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Can i attach voltage in to the 5v pin? i'm trying to put this on a pcb. will it have the same voltage regulation?**
A: As a previous contributor wrote: a lot of people answering questions here do not know what they are talking about! So here is the answer copied straight from the Seeed Studio webpage regarding this board:
"Note
For general I/O pins: Working voltage of MCU is 3.3V . Voltage input connected to general I/O pins may cause chip damage if it' higher than 3.3V .
For power supply pins: The built-in DC-DC converter circuit able to change 5V voltage into 3.3V allows to power the device with a 5V supply via VIN-PIN and 5V-PIN.
Please pay attention to use, do not lift the shield cover."

**Q: Does this come with a bootloader or not?**
A: yes - I'm pretty sure it does.  Its been a while since I played with it.  But I seem to recall all was needed was to download the necessary Arduino files into the Arduino programming system and make the correct connection to the device.   However be aware the device is finicky in that it needs to be rebooted for programming mode using a jumper wire.  So if you're doing a lot of development/debugging, do that work in a standard Arduino first, and then translate your  debugged program to this device.

**Q: Is the IO 5V tolerant?**
A: From the testing I have done on mine, the pins when being used as an input, are 3.3v tolerant.

**Q: The board can be connected to 5V power supply and simultaneously been conectes to the usb conector from my computer?**
A: There would be a problem if the 5V supply was actually a lower voltage than the USB (which should be 5V). A diode protects everything if the external 5V supply was above 5V (up to the 6V limit of the voltage regulator on the board). To be safe, a diode should be added in series with the external 5V supply. This protection is present in genuine Arduino boards' VIN pin.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by R***S on 10 May 2021*

I bought 3 of these a couple years ago to play around with. At the time, it was just because they were cheap and quick to get on Amazon. I quickly fell in love. Though they aren't perfect. Pros: Size. They're tiny. Even 2 years on, most microcontrollers are *at least* 2 to 4 times the size. The small size makes them easy to fit into almost any project. They're literally the size of a postage stamp. I can cover one with my finger. Which brings me to the next pro: I/O. Even at this tiny size, you still have tons of I/O, with support for hardware interrupts, UART, I2C, SPI, and true analog pins with DAC. The big one for me, though, is HID support through the USB type C port. That's a much less common feature than you'd think. If you want to make devices that can talk to other devices as an input device, you need this. Speed. You don't really think that a simple Arduino device needs to be fast, but having a 48mhz processor and 32mb of SRAM to work with open up a LOT of possibilities. Take, for example, my most recent project. I wanted to make a vintage laptop keyboard work with a modern laptop motherboard. But I wanted to do so without damaging the original keyboard. So to interface the two, I needed the Xiao to be able to read the PS/2 protocol that the keyboard was talking in, and give USB HID protocol commands to the computer. Reading the PS/2 protocol takes very precise timing. Your code has to execute within a certain number of microseconds, otherwise the command will fail. Because of the speed of the processor, I could have more code executing in the interrupts while still staying under the threshold. Cons: Storage. While I've never run up against the limit, the Xiao has 256 kB of flash memory. That's not the smallest, but it's certainly not the biggest I've seen on a microcontroller. So I do get a little nervous when I start importing a bunch of libraries. So far, my most involved project, the keyboard that I talked about earlier, only uses about 25% of that storage. And that's importing two different libraries plus my custom code. But if you have a large project that takes many libraries or a whole lot of code, you might run into problems with storage. Bootloader Corruption. I've only had it happen once and it was after hundreds upon hundreds of code uploads. These guys saying they're bricking after 50 uploads have to be doing something wrong. Or maybe it's because they're on Mac hardware, I don't know. But I've had to upload 50 times pretty much everyday I've worked on this project and so far it's not been a problem. But like I said, I did have one of my original three stop responding to USB. So the problem does exist. The device itself still does what the last upload of code told it to do, but I can no longer get it to talk with the Arduino software. And resetting the unit didn't resolve it. So you're mileage may vary.

### ⭐⭐⭐⭐⭐ Review
*by N***N on 11 May 2024*

Very satisfied with the purchase, all 3 SAMD21 board tested and confirmed working. I will be able to prototype easily with these spare boards

### ⭐⭐⭐⭐⭐ Review
*by S***N on 27 September 2023*

Super petit très content : ) !

## Frequently Bought Together

- Seeed Studio XIAO SAMD21The Smallest Arduino Microcontroller Based on SAMD21,with Rich Interfaces, 100% Arduino IDE Compatible, desiged for Projects Need Arduino Micro, 1pc
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---

*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-02-07*