Arduino Nano Matter vs Seeed XIAO ESP32-C6: Compact Thread Boards Compared

The Arduino Nano Matter and Seeed Studio XIAO ESP32-C6 are two compact development boards designed for modern low-power wireless projects.

Both support the radio technology required for:

• Thread;
• IEEE 802.15.4;
• Matter-over-Thread;
• Zigbee;
• Bluetooth Low Energy.

But they approach the problem from very different directions.

The Nano Matter is the more purpose-built Arduino Matter/Thread board.

The XIAO ESP32-C6 is the more flexible radio platform because it adds Wi-Fi 6, ESP-NOW and the wider ESP32 ecosystem while remaining extremely small.

Quick Comparison

Feature	Arduino Nano Matter	Seeed XIAO ESP32-C6
Main device	Silicon Labs MGM240SD22VNA	Espressif ESP32-C6
Main CPU	Arm Cortex-M33	32-bit RISC-V HP core
Maximum clock	78 MHz	160 MHz
Low-power CPU	Integrated low-power architecture	20 MHz LP RISC-V core
RAM	256 kB	512 kB SRAM
Flash	1536 kB	4 MB
Wi-Fi	No	2.4 GHz Wi-Fi 6
BLE	Bluetooth LE 5.3	Bluetooth LE 5.3-class
IEEE 802.15.4	Yes	Yes
Thread	Yes	Yes
Matter over Thread	Yes	Yes
Zigbee	Yes	Yes
ESP-NOW	No	Yes
Exposed GPIO	22 digital-capable Nano positions	11 primary XIAO GPIO
ADC	12 bit	7 ADC-capable main pins
True DAC	Up to four 12-bit DAC channels	No
USB	USB-C	USB-C
Battery charging	No dedicated onboard Li-ion charger	Yes
Battery input	External battery/power solution required	3.7 V lithium battery
VIN	6-21 V	No equivalent wide-range VIN
Antenna	Integrated module antenna	Onboard antenna + U.FL option
Dimensions	18 × 45 mm	21 × 17.8 mm

Both Are Real Thread Boards

The most important similarity is that both boards contain an IEEE 802.15.4 radio.

That means both can participate directly in:

• Thread;
• Matter-over-Thread;
• Zigbee;
• low-power 802.15.4 networks.

This is fundamentally different from an ESP32-S3 or ESP32-C3 board, which lacks native IEEE 802.15.4 hardware.

Matter and Thread Are Different Things

It is useful to separate the layers:

A typical Matter-over-Thread accessory works like this:

Both boards can operate as the Matter/Thread endpoint in this architecture.

Nano Matter Is Built Around the Silicon Labs MGM240S

The MGM240S provides:

Arduino positions the board specifically for:

• Matter;
• OpenThread;
• Zigbee;
• low-power IoT;
• smart-home devices.

XIAO ESP32-C6 Adds Wi-Fi 6

The ESP32-C6 provides:

That makes XIAO ESP32-C6 much more flexible as a general wireless board.

The same hardware can run:

• MQTT over Wi-Fi;
• Matter over Wi-Fi;
• Matter over Thread;
• Zigbee;
• ESP-NOW;
• BLE applications.

Matter-over-Thread Works in Current Arduino-ESP32

This point is important because some older XIAO Matter tutorials are now out of date.

Earlier Seeed documentation said Matter development required ESP-IDF and that XIAO ESP32-C6 Matter examples were not available through Arduino.

Current Espressif Arduino documentation now includes prebuilt:

support for ESP32-C6.

The Arduino Matter library now exposes network selection such as:

on supported C6 configurations.

That Changes the 2026 Comparison

In older comparisons, Nano Matter had a much easier Arduino Matter story while ESP32-C6 often required ESP-IDF.

In 2026, the gap is smaller.

You can now develop Matter-over-Thread applications on ESP32-C6 using the current Arduino-ESP32 core.

Nano Matter still has a more purpose-built Arduino/Silicon Labs workflow, but XIAO ESP32-C6 is no longer an ESP-IDF-only choice for Matter.

Nano Matter Protocol Stack Workflow

The Silicon Labs Arduino core exposes protocol-stack selection through the Arduino IDE.

Options include stacks such as:

This is a simple mental model:

XIAO ESP32-C6 Uses the ESP32 Ecosystem

With XIAO you can use:

• Arduino-ESP32;
• ESP-IDF;
• ESP-Matter;
• Arduino Matter;
• Arduino Zigbee;
• Arduino OpenThread;
• ESP-NOW;
• standard Wi-Fi libraries.

This gives more flexibility, but also more architectural choices.

Wi-Fi Is XIAO’s Biggest Advantage

Nano Matter has no Wi-Fi radio.

XIAO ESP32-C6 includes:

So one board can move between:

without changing hardware.

Why Wi-Fi Matters During Development

Wi-Fi can make early prototypes easier.

For example, you could initially build:

and later move the same XIAO board to:

This is useful when the final networking architecture has not been decided yet.

Wi-Fi Is Not Automatically Better for Battery Devices

A sleepy Thread endpoint has different design goals from a Wi-Fi client.

Thread is designed around:

• small packets;
• low-power mesh;
• sleepy end devices;
• local IPv6 connectivity.

Wi-Fi gives more bandwidth, but can require more energy during active network sessions.

The presence of Wi-Fi 6 on XIAO is valuable flexibility, not a reason to ignore Thread.

Size: XIAO Is Less Than Half the Length

XIAO ESP32-C6 measures:

Nano Matter measures approximately:

XIAO is dramatically shorter.

That makes it excellent for:

• tiny sensors;
• wearables;
• in-wall devices;
• small smart buttons;
• asset tags;
• compact enclosures.

Nano Matter Has More Header I/O

The trade-off is pin count.

Nano Matter exposes the larger Nano header with approximately:

XIAO ESP32-C6 exposes:

for 11 primary user GPIO.

If the project needs many peripherals, Nano Matter gives much more breathing room.

XIAO ESP32-C6 Pin Map

XIAO pin	ESP32-C6 GPIO	Default use
D0	GPIO0	ADC, GPIO, LP_GPIO0
D1	GPIO1	ADC, GPIO, LP_GPIO1
D2	GPIO2	ADC, GPIO, LP_GPIO2
D3	GPIO21	GPIO
D4	GPIO22	I²C SDA
D5	GPIO23	I²C SCL
D6	GPIO16	UART TX
D7	GPIO17	UART RX
D8	GPIO19	SPI SCK
D9	GPIO20	SPI MISO
D10	GPIO18	SPI MOSI

Seven ADC Channels on XIAO ESP32-C6

Seeed documents:

on the XIAO ESP32-C6 platform.

Three are directly on:

with additional ADC-capable JTAG/test signals available in the hardware design.

Nano Matter Has Stronger Analog Hardware

The MGM240S includes:

• 12-bit ADC;
• multiple analog channels;
• up to four 12-bit DAC channels.

The Nano Matter pinout exposes DAC functions on several analog-labelled pins:

depending on the selected DAC channel/function.

XIAO ESP32-C6 Has No True DAC

ESP32-C6 does not include a normal voltage-output DAC.

For true analog output use:

• external I²C/SPI DAC;
• PWM plus low-pass filter;
• I²S plus external DAC.

If analog output is important, Nano Matter is the stronger board.

Battery Charging Is XIAO’s Biggest Physical Advantage

XIAO ESP32-C6 includes an onboard power-management chip that can:

• run the board from a 3.7 V rechargeable lithium battery;
• charge that battery from USB-C.

This makes a complete portable Matter/Thread node much easier to build.

XIAO Battery Input

Seeed recommends:

connected to the dedicated battery pads.

When running from battery:

which is important when powering external sensors.

Nano Matter Does Not Include a Li-Ion Charger

Nano Matter can certainly be used in battery-powered devices, but battery charging requires an external charger/power-management design.

For a rechargeable button or wearable, XIAO reduces component count significantly.

Nano Matter Wins on Wide VIN

Nano Matter supports:

in addition to USB-C and 5 V power.

This makes it easy to integrate into:

• 9 V systems;
• 12 V controllers;
• industrial-style embedded power systems.

XIAO does not provide an equivalent wide VIN input.

Different Power Philosophies

The boards are optimised for different sources:

XIAO Deep-Sleep Figure

Seeed documents typical deep sleep around:

at approximately 3.8 V under its published test conditions.

That is very attractive for:

• sleepy Thread end devices;
• battery buttons;
• contact sensors;
• temperature nodes.

Real battery life still depends heavily on radio wake time, sensor current, commissioning and application duty cycle.

Nano Matter Also Has a Low-Power Mode

Arduino documents a low-power configuration where:

• the power LED supply path can be disabled;
• the onboard 3.3 V rail can be isolated;
• the board can be supplied directly with 3.3 V;
• the USB bridge can remain unpowered.

This is more work than XIAO’s integrated battery-charger path, but it gives the Nano Matter strong low-power potential.

Antenna Flexibility

Nano Matter uses the integrated antenna arrangement of its MGM240S module.

XIAO ESP32-C6 includes:

• an onboard antenna;
• an external U.FL antenna interface.

The RF switch is controlled with:

By default, the onboard antenna is used.

Why the U.FL Option Matters

An external antenna can help when the board is installed:

• inside a metal enclosure;
• behind a display;
• inside a wall box;
• in an awkward RF orientation.

Nano Matter does not provide the same easy antenna-relocation option.

USB-C on Both Boards

Both boards use USB-C for development.

XIAO uses the ESP32-C6 native USB/serial-JTAG path.

Nano Matter uses the onboard Arduino debug/USB architecture with SWD access to the MGM240S.

Debugging

Nano Matter

The Silicon Labs board supports SWD/OpenOCD-style debugging through Arduino’s onboard debug interface.

XIAO ESP32-C6

ESP32-C6 includes native:

which gives convenient:

• flashing;
• serial output;
• JTAG debugging;
• bootloader recovery.

Wi-Fi 6 Gives XIAO Extra Non-Matter Uses

XIAO can be used as a normal Wi-Fi board even if the final project never uses Matter.

That means it is useful for:

• MQTT sensors;
• HTTP clients;
• small web servers;
• ESP-NOW nodes;
• cloud-connected devices;
• Home Assistant integrations.

Nano Matter is much more focused on 802.15.4/BLE workflows.

Zigbee

Both boards can be used for Zigbee.

Nano Matter uses the Silicon Labs Zigbee stack through the Arduino core.

XIAO ESP32-C6 can use Espressif’s Zigbee stack through:

• Arduino-ESP32;
• ESP-IDF;
• ESP Zigbee SDK.

Thread Border Router Requirement

For normal Matter-over-Thread home integration, both boards still require a Thread Border Router elsewhere in the network.

Neither endpoint board replaces that role automatically.

Home Assistant

Both can be used as Matter-over-Thread endpoints with Home Assistant when the installation includes:

• a working Thread Border Router;
• IPv6 connectivity;
• Home Assistant Matter Server;
• proper commissioning credentials.

The practical difference is that XIAO can also bypass Thread entirely and use Wi-Fi/MQTT if you decide Matter is not appropriate for the project.

Nano Matter Has More I/O for Complex Devices

A multi-function device might need:

• multiple relays;
• several buttons;
• LEDs;
• I²C sensors;
• SPI display;
• interrupt lines;
• analog inputs.

The Nano header gives much more pin budget than the XIAO’s 11 primary GPIO.

XIAO Is Better for a Tiny Single-Purpose Sensor

A simple sensor might need only:

For that workload, 11 GPIO are plenty, and XIAO’s smaller physical size and built-in charger become more valuable than extra pins.

Nano Matter Is Better for Analog Control

If the project requires:

• true analog output;
• multiple DAC channels;
• more analog routing;

Nano Matter has a clear hardware advantage.

XIAO Is Better for RF Experimentation

The ability to switch between:

makes XIAO easier to integrate into difficult enclosures.

Which Is Better for a Rechargeable Smart Button?

XIAO ESP32-C6.

The combination of:

• 21 × 17.8 mm size;
• 3.7 V battery input;
• USB-C charging;
• 15 µA-class published deep sleep;
• Thread/Matter radio;

is extremely attractive for a compact rechargeable button.

Which Is Better for a 12 V Matter Controller?

Nano Matter.

Its:

makes direct integration much easier.

Which Is Better for a Matter Sensor with Wi-Fi Fallback?

XIAO ESP32-C6.

Because the same board includes Wi-Fi 6, the firmware can be redesigned around Wi-Fi if required without changing the hardware platform.

Which Is Better for Arduino Simplicity?

Nano Matter still has the cleaner dedicated experience because:

• the board is explicitly sold for Matter;
• the Silicon Labs core has protocol-stack selections;
• the Arduino documentation is focused on Matter/Thread use;
• pin naming follows the familiar Nano model.

XIAO ESP32-C6 is now fully viable in Arduino for Matter-over-Thread, but you are working within the broader ESP32 ecosystem rather than a single-purpose Matter board.

Decision Table

Requirement	Better fit
Smallest board	XIAO ESP32-C6
Matter over Thread	Both
Thread	Both
Zigbee	Both
Wi-Fi 6	XIAO ESP32-C6
ESP-NOW	XIAO ESP32-C6
Built-in Li-ion charging	XIAO ESP32-C6
Published ~15 µA deep sleep	XIAO ESP32-C6
External U.FL antenna option	XIAO ESP32-C6
More exposed I/O	Nano Matter
True DAC	Nano Matter
6-21 V VIN	Nano Matter
Nano carrier compatibility	Nano Matter
Dedicated Arduino Matter workflow	Nano Matter
General-purpose multi-radio experimentation	XIAO ESP32-C6

Quick Reference

Final Thoughts

Nano Matter and XIAO ESP32-C6 are both excellent compact Matter/Thread boards, but they target different physical and software priorities.

Choose Arduino Nano Matter when you want:

• a dedicated Matter/Thread board;
• more GPIO;
• true DAC outputs;
• wide VIN input;
• Nano carrier compatibility;
• the cleanest Arduino-first Matter workflow.

Choose Seeed XIAO ESP32-C6 when you want:

• minimum physical size;
• built-in lithium-battery charging;
• Wi-Fi 6 as well as Thread/Zigbee;
• ESP-NOW;
• an external U.FL antenna option;
• the broader ESP32 ecosystem.

The simplest decision rule is:

For the Arduino board pinout, see our Nano Matter pinout guide.