We’ve heard from our community about the limited number of compatible add-on modules for our tiny but powerful Seeed Studio XIAO boards. Starting 2025, we’re addressing this by developing more XIAO add-ons!

Seeed Studio XIAO Add-ons are expansion boards, sensors, connectivity modules, and actuators with a socket where Seeed Studio XIAO dev boards (pre-soldered versions) clip right in. You can explore the full collection on our Seeed Studio XIAO Selector page.

For our first product collection of the year, we’re introducing a new relay, ePaper Driver Board, expansion board, and sensor – all compatible with Seeed Studio XIAO boards!

ePaper Driver Board for XIAO

Compatibility: all Seeed Studio XIAO Pre-Soldered Dev Boards (SAMD21, RP2040, nRF52840, nRF52840 Sense, ESP32C3, ESP32S3, ESP32S3 Sense, ESP32C6, RP2350, RA4M1, The pre-soldered variants for XIAO MG24 and XIAO MG24 Sense will be coming soon)

This ePaper driver board features a 24-pin FPC connector, a built-in charging IC, and a JST 2-pin BAT connector. It’s perfect for creating WiFi-enabled digital photo frames, supporting various ePaper displays (2.13″ Monochrome eInk / ePaper Display with 122×250 Pixels, 2.9″ Quadruple Color eInk / ePaper Display with 128×296 Pixels, 5.83″ Monochrome eInk / ePaper Display with 648×480 Pixels, 2.9″ Monochrome eInk / ePaper Display with 296×128 Pixels).

Compared to our 2023 ePaper Breakout Board, this new version includes:

• JST 2-pin BAT connector
• Built-in charging IC
• Onboard power switch
• Extra 14 IO pins for expansion
• Standard XIAO add-on dimension (which is the triple size of a XIAO board)

Don’t worry – we’ll keep both versions available to suit different application needs. Currently, this new ePaper Driver Board is available for pre-order at $4.9, with estimated shipping at the end of January 2025.

Relay Add-on Module for XIAO

Compatibility: all Seeed Studio XIAO Pre-Soldered Dev Boards (SAMD21, RP2040, nRF52840, nRF52840 Sense, ESP32C3, ESP32S3, ESP32S3 Sense, ESP32C6, RP2350, RA4M1, The pre-soldered variants for XIAO MG24 and XIAO MG24 Sense will be coming soon)

Need to control DC appliances from your XIAO? This single-channel 5V Relay Add-on Module for XIAO handles all the control with DC. With snap-on compatibility for pre-soldered XIAO boards and screw terminals, no soldering is required! The HF32FA-G relay makes it perfect for IoT and home automation. P.S. Our team also designed a 3D enclosure for this relay add-on with an XIAO dev board and open sourced it on Thingiverse for you to remix.

For dual-load AC control, check out our plug-and-play 2-Channel AC WiFi Relay, based on XIAO ESP32C3. It comes pre-flashed with ESPHome firmware for compatibility with native Home Assistant.

XIAO Logger Hat

Compatibility: all Seeed Studio XIAO Pre-Soldered Dev Boards (battery voltage monitoring unavailable for XIAO SAMD21 and XIAO RP2040)

Looking for a thumb-size temperature, humidity and light sensor? XIAO Logger Hat gets you covered. Created by Westlake University’s Marcel and scaled through Fusion Co-Create, this thumb-sized environmental sensor includes SHT40 temperature, humidity, and BH1750 light sensors, plus RTC and battery voltage monitoring.

XIAO PowerBread, a Breadboard Power Supply and Meter

Compatibility: Seeed Studio XIAO Pre-Soldered Dev Boards (RP2040, ESP32C3, ESP32S3, ESP32S3 Sense, ESP32C6) (XIAO SAMD21 and XIAO RP2350 support coming soon)

Designed by Nicho D through Seeed Fusion Co-Create, XIAO PowerBread is a compact breadboard power supply with built-in monitoring. It provides stable 3.3V and 5V outputs with real-time voltage, current, and power tracking on its LCD display. It’s open-source with comprehensive documentation and customizable code.

That’s our new product roundup! Tell us which product interests you most or share your suggestions. Want to influence our future products? Join the discussion on our Seeed Studio XIAO Open Roadmap – your input shapes what we build next.

Until next time!

Notes at the end.

Hey community, we’re curating a monthly newsletter centering around the beloved Seeed Studio XIAO. If you want to stay up-to-date with:

 Cool Projects from the Community to get inspiration and tutorials
 Product Updates: firmware update, new product spoiler
 Wiki Updates: new wikis + wiki contribution
 News: events, contests, and other community stuff

Please click the image below to subscribe now!

The beloved Seeed Studio XIAO boards, with their surface-mount device (SMD) design and Castellated Mounting Holes, have become popular integrated system modules in countless creative designs, projects, and even commercial products. Their board-to-board soldering capability allows XIAO boards to be easily integrated into carrier boards, enabling faster assembly and scalable production.

1: The Zilpzalp Keyboard by Keeb Supply;  2:ANAVI Knobs 3 by Anavi Technology;
3:300A | 80V Smart Shunt by Steve Willson Kujur;  4:ANAVI Dev Mic by Anavi Technology;
5:Smart Key Finder by Hamid Sheibani;   6: 6-Channel Temperature Meter by Gokux;

Since launching our first XIAO SAMD21 (formerly Seeeduino XIAO) in 2019, we’ve received countless community requests for more than the standard 14 castellated mounting holes on two edges, as these weren’t sufficient for complex projects requiring additional IOs. Now, please meet Seeed Studio XIAO Plus – our response to this community feedback.

Inspired by the cool SMD pins design of the RICK TNY, Seeed Studio XIAO Plus represents a new iteration of our regular XIAO Boards, featuring redesigned 23 castellation pins (20 GPIOs, 3 power pins) and back solder points specifically for projects needing expanded IOs. We’re launching XIAO Plus versions for three models: XIAO ESP32S3 Plus, XIAO nRF52840 Plus, and XIAO nRF52840 Sense Plus, which are all available for instant order at our webstore and AliExpress Store.

Why only these three XIAOs?

While we’d love to upgrade all XIAO boards, the limited pins on some integrated chips (SAMD21, RP2040, RA4M1, ESP32-C3, and ESP32-C6) restrict the IO expansion. These three models were selected based on overwhelming user demand for additional castellated IOs. Moreover, the XIAO ESP32S3 Plus also doubles its Flash memory to 16MB, supporting more complex applications.

What's new with the back solder points?

Previously, XIAO boards lacked uniformity in their back-side solder points and layouts, hampering our ability to develop universal expansion boards. Our latest XIAO boards (RP2350, RA4M1, MG24 and MG24 Sense) share nearly identical back layouts. The XIAO Plus boards follow suit, with aligned battery and debugger pads.

This standardization means our upcoming expansion boards (such as the XIAO Clip Board) will work with all seven boards (3 XIAO Plus models, XIAO RP2350, RA4M1, and MG24/Sense). We’re actively working on compatibility solutions for other XIAO boards and will share updates once available.

Is XIAO Plus harder to solder?

The through-holes for 7-pin headers remain unchanged, but the castellated mounting holes are slightly smaller and closer together (13 on the left, 10 on the right). While this does make board-to-board soldering more challenging, our 11-person product team successfully tested it with early samples.

We’ll be honest – it requires more precision, but proper tools make a significant difference. Essential items include a brass sponge, water-soluble flux pen, tweezers, acid brush, and rubbing alcohol. For detailed guidance, check out SparkFun’s excellent tutorial on How to Solder: Castellated Mounting Holes.

Join Seeed Studio XIAO Adopter Program

Ready to showcase your soldering skills? Share your XIAO Plus project ideas in the comments! I’ll select three winners to receive their chosen XIAO Plus board (via coupon). Winners will be announced on January 10, 2025. Share now! To assist developers in adapting their projects to the XIAO Plus quickly, we’re adding all the XIAO Plus Boards to the Seeed Studio XIAO Adopter Program. If you’re an author or maintainer of a popular open-source project on GitHub, or an influencer on platforms like YouTube or Tiktok or Instagram, make sure your users can run your code on the XIAO Plus. Join to receive 2 free boards and technical support to make your code compatible with these exciting new boards.

Notes at the end.

Hey community, we’re curating a monthly newsletter centering around the beloved Seeed Studio XIAO. If you want to stay up-to-date with:

 Cool Projects from the Community to get inspiration and tutorials
 Product Updates: firmware update, new product spoiler
 Wiki Updates: new wikis + wiki contribution
 News: events, contests, and other community stuff

Please click the image below to subscribe now!

Hey XIAO enthusiasts! If you’re one of those dedicated fans who’ve collected all 12 XIAO Dev Boards (as of December 2024), you’ve probably noticed that only the classic XIAO SAMD21 (Seeedduino XIAO) comes in a pre-soldered option. We’ve heard your feedback loud and clear – soldering these thumb-sized boards can be quite challenging!

Great news to freshen the week: We’re thrilled to announce pre-soldered versions across our entire XIAO lineup! Here’s what’s coming:

WiFi & Bluetooth Enabled:

• XIAO ESP32C3
• XIAO ESP32C6 (with Thread, Zigbee, Matter support)
• XIAO ESP32S3
• XIAO ESP32S3 Sense

Bluetooth Solutions (low power consumption too):

• XIAO nRF52840 (NFC)
• XIAO nRF52840 Sense (NFC)
• XIAO MG24 (with Thread, Matter support)
• XIAO MG24 Sense (with Thread, Matter support)

Advanced Microcontrollers:

• XIAO RP2040
• XIAO RP2350
• XIAO RA4M1

Classic Option:

• XIAO SAMD21

Why pre-soldered? Simple! No more fiddling with soldering irons on such tiny soldering pads- just unbox and start creating. These boards are ready to work with all XIAO add-ons (sensors, connectivity modules, actuators, and Grove Expansions) in a quick snap, perfect for breadboard prototyping or direct project integration.

Take our XIAO Starter Kit, for example. Just snap your pre-soldered XIAO onto the Expansion Board, and you’ve instantly got access to over 300 Grove modules plug and play. Perfect for education, rapid prototyping, or anyone who wants to jump straight into their project!

What’s your favorite XIAO board? Which pre-soldered XIAO will you try first? We’d love to hear about your project ideas with these new updates. Comment below to let us know!

P.S. This update comes straight from your feedback through the Seeed Studio XIAO Open Roadmap on GitHub, an open collaborative platform on GitHub where the community decides what we build next (explore more details here). Have more ideas for the XIAO ecosystem? Join the discussion on our open roadmap – we’re always listening!

Notes at the end.

Hey community, we’re curating a monthly newsletter centering around the beloved Seeed Studio XIAO. If you want to stay up-to-date with:

 Cool Projects from the Community to get inspiration and tutorials
 Product Updates: firmware update, new product spoiler
 Wiki Updates: new wikis + wiki contribution
 News: events, contests, and other community stuff

Please click the image below to subscribe now!

Our Seeed Studio XIAO ecosystem has been growing steadily with tap-on accessories like Grove Expansion Boards, Sensors, Connectivity Modules, and Actuators to complement our thumb-sized dev boards. But one thing kept coming up in our XIAO Open Roadmap – you wanted more relays! Well, we heard you, and here’s our answer: the new Seeed Studio 2-Channel AC Wi-Fi Relay.

Powered by our thumb-sized XIAO ESP32C3, this Home Assistant-native relay device lets you control two independent 100-240V AC loads – perfect for lights, appliances, and motorized facilities. We’ve pre-flashed it with ESPHome firmware and built in a power meter, so you can track both real-time and historical power consumption right from your Home Assistant dashboard. 

All the above-mentioned features make it particularly suited for applications that need both remote control and power monitoring of household electrical devices through a smart home automation system.

Want to know what’s under the hood? We’ve packed in two 10A/250VAC high-power latching relays (HF3F-L), giving you control over two loads on a 50-60 Hz AC carrier signal. Here’s a sneak peek at the internals – and don’t worry, we’ll be open-sourcing all schematics on our Wiki soon!

Ready to get your hands on one? The Seeed Studio 2-Channel AC Wi-Fi Relay is available for pre-order at our Bazaar webstore for just $19.90. Shipping starts in early January 2025, and it’ll also be available on our AliExpress and Amazon stores.

Oh, and one more thing! The relay comes in a white 3D-printed enclosure (which you can download and customize from Thingiverse for free). And for all you makers and developers who want to DIY with your existing XIAO boards – stay tuned! We’re working on a universal Relay Add-on that’ll be compatible with all XIAO dev boards.

Notes at the end.

Hey community, we’re curating a monthly newsletter centering around the beloved Seeed Studio XIAO. If you want to stay up-to-date with:

 Cool Projects from the Community to get inspiration and tutorials
 Product Updates: firmware update, new product spoiler
 Wiki Updates: new wikis + wiki contribution
 News: events, contests, and other community stuff

Please click the image below to subscribe now!

Choosing the right SoC for the next Seeed Studio XIAO is always challenging. It must represent cutting-edge technology, bringing innovation in communication networking, computing performance, or ecosystem compatibility. When Silicon Labs EFR32MG24 came into our view, we were immediately excited by its enormous potential to make the promising Matter® wireless communication protocol accessible to ALL – perfectly aligning with Seeed’s vision of Making Technology Accessible for ALL.

Matter connects IoT platforms and smart home devices across different brands, bridging the gap between different ecosystems like Amazon, Google, and Apple. This new industry-unifying standard provides reliable connections and simplifies development for makers. We are now thrilled to introduce the Seeed Studio XIAO MG24 and the Seeed Studio XIAO MG24 Sense, thumb-sized Matter®-native dev boards all powered by Silicon Labs EFR32MG24!

Seeed Studio XIAO MG24 (Sense), Tailored for Battery-Powered Matter Applications

The Seeed Studio XIAO MG24 and XIAO MG24 Sense are two tiny Arduino-compatible development boards that uniquely combine Matter with the Seeed Studio XIAO ecosystem. The EFR32MG24 Wireless SoC features a 32-bit ARM Cortex-M33 core processor running at 78MHz with DSP instructions, 1536KB Flash memory, and 256KB RAM. Thanks to the Silicon Labs SoC inside, the XIAO MG24 and XIAO MG24 Sense support Matter® over Thread® and Bluetooth® Low Energy 5.3. In the future, there will be support for the other common 2.4 GHz protocols on the Arduino Core.

In the signature Seeed Studio XIAO form factor (21×17.8mm), both XIAO MG24 and XIAO MG24 Sense feature 4MB onboard Flash capacity, LED, and 19 GPIOs. The XIAO MG24 Sense additionally includes two onboard sensors: an analog microphone and a 6-axis Inertial Measurement Unit (IMU). These new XIAO boards excel in battery management, featuring an onboard charging circuit, internal IO for battery voltage measurement, and support for an increased charging current of 160mA. Their battery management system and ultra-low-power consumption design make them ideal for the rapid development and prototyping of Matter-based battery-powered IoT devices.

“Seeed Studio has consistently delivered innovative and cost-effective hardware solutions that empower developers around the globe. We are thrilled to collaborate with them on the XIAO MG24 boards, which integrate our EFR32MG24B220F1536IM48-B chip. This partnership not only broadens the reach of our technology but also aligns with our vision of fostering a vibrant developer community. We look forward to seeing the creative and impactful applications that will emerge from this collaboration,” says Rob Shane, Vice President, Mass Market Sales & Applications at Silicon Labs.

Seeed Studio XIAO for Matter: XIAO MG24 (Sense) & XIAO ESP32C6

These aren’t our first Matter-compatible XIAOs. Earlier this year, we launched the XIAO ESP32C6, supporting multiple protocols including Zigbee, Wi-Fi 6, BLE 5, and Thread. For those wondering about the differences between these models, please refer to the comparison table below to find the perfect match for your Matter applications.

Join Our Seeed Studio XIAO Early Adopter Program

XIAO MG24 and XIAO MG24 Sense are now available for pre-order through our Bazaar webstore at $7.9 and $10.9 respectively, with shipping expected in late November 2024. To celebrate the launch, here is a limited-time offer: 10% off for the first 100 purchases. Shop NOW.

To help developers quickly adapt their projects to the XIAO MG24 (Sense), we’re launching our XIAO Early Adopter Program. If you’re an author or maintainer of a popular open-source Matter or IoT project on GitHub, or an influencer on YouTube, TikTok, or Instagram, ensure your users can run your code on the XIAO MG24. Join to receive two free early sample boards (shipping mid-November) and technical support for making your code compatible with this exciting new board.

Notes at the end.

Hey community, we’re curating a monthly newsletter centering around the beloved Seeed Studio XIAO. If you want to stay up-to-date with:

 Cool Projects from the Community to get inspiration and tutorials
 Product Updates: firmware update, new product spoiler
 Wiki Updates: new wikis + wiki contribution
 News: events, contests, and other community stuff

Please click the image below to subscribe now!