Arduino Nano ESP32 vs Nano Matter: Wi-Fi/BLE or Thread/Matter?

The Arduino Nano ESP32 and Arduino Nano Matter look almost identical from the outside.

Both use the compact Nano form factor, both operate at 3.3 V, both have USB-C, both support Bluetooth Low Energy and both target connected embedded projects.

Architecturally, however, they solve very different problems.

The important choice is therefore not simply “which board has better wireless?”

It is:

Quick Comparison

Feature	Nano ESP32	Nano Matter
Main MCU/module	NORA-W106-10B / ESP32-S3	MGM240SD22VNA
CPU	Dual-core Xtensa LX7	Arm Cortex-M33
Maximum silicon clock	240 MHz	78 MHz
Logic voltage	3.3 V	3.3 V
Internal RAM	512 kB	256 kB
PSRAM	8 MB	None
Flash	16 MB external QSPI	1536 kB internal
Wi-Fi	Yes, 2.4 GHz Wi-Fi 4	No
Bluetooth LE	Yes, BLE 5-class	Yes, BLE 5.3
IEEE 802.15.4	No	Yes
Thread	No native 802.15.4 Thread radio	Yes
Matter over Thread	No by itself	Yes
Zigbee	No native radio support	Yes in current Silicon Labs Arduino core
ESP-NOW	Yes	No
ADC	12-bit SAR ADC	12-bit ADC
True DAC	No	Up to four 12-bit DAC channels
USB	Native ESP32-S3 USB-C	USB-C with onboard debug/bridge architecture
Debugging	USB/JTAG built into ESP32-S3	SWD debugging over USB
Best fit	General IoT, Wi-Fi, web, ESPHome-style development, MicroPython	Matter, Thread, Zigbee, low-power smart-home nodes

The Main Difference Is the Radio

The Nano ESP32 contains an ESP32-S3, which provides:

• 2.4 GHz Wi-Fi 4;
• Bluetooth Low Energy;
• ESP-NOW;
• standard IP networking directly over Wi-Fi.

Nano Matter’s MGM240S instead provides:

• IEEE 802.15.4;
• Thread;
• Bluetooth Low Energy 5.3;
• Bluetooth Mesh;
• Zigbee through the current Arduino Silicon Labs core.

This single hardware difference determines much of the rest of the comparison.

Nano ESP32 Connects Directly to Wi-Fi Networks

A typical Nano ESP32 network looks like:

The board can run a TCP/IP stack directly and talk to normal network infrastructure without a specialised border router.

This is useful for:

• MQTT sensors;
• REST APIs;
• web servers;
• Arduino Cloud;
• direct Home Assistant integrations;
• OTA updates;
• internet-connected devices.

Nano Matter Uses Thread Rather Than Wi-Fi

A normal Matter-over-Thread architecture looks like:

Thread is an IPv6 mesh protocol built on IEEE 802.15.4.

That means Nano Matter can participate in an IP-based smart-home architecture, but it does not directly join the home’s Wi-Fi network.

A Thread Border Router Is Normally Required

For Matter-over-Thread, you need a Thread Border Router somewhere in the installation.

The border router bridges:

The Thread Border Router and Matter controller are different logical roles, although a single smart-home hub can provide both.

For more detail on this architecture, see our Matter over Thread and Home Assistant guide.

BLE Has a Different Role on Each Board

Both boards support Bluetooth Low Energy, but it often serves a different purpose.

Nano ESP32

BLE is a general application transport.

You can use it for:

• phone apps;
• BLE sensors;
• BLE central/peripheral projects;
• beacons;
• local configuration.

Nano Matter

BLE is especially important during Matter commissioning.

The normal flow is:

The current Silicon Labs Arduino stack can also use BLE for custom applications after Matter pairing.

Matter Is Not the Same Thing as Thread

This distinction is essential.

Nano Matter combines all the hardware needed for Matter-over-Thread in one board.

Nano ESP32 does not because ESP32-S3 lacks an IEEE 802.15.4 radio.

Can Nano ESP32 Run Matter?

An ESP32-S3 can participate in Matter applications over IP transports supported by the software ecosystem, but it cannot become a native Matter-over-Thread endpoint without an external 802.15.4 radio/co-processor.

So if your specific target is:

Nano Matter is the direct hardware match.

Nano Matter Also Supports Zigbee

The current Arduino Silicon Labs core provides selectable protocol stacks including:

• Matter;
• Zigbee;
• BLE using ArduinoBLE;
• BLE using the Silicon Labs API;
• None.

This makes Nano Matter useful beyond Matter-only development.

Its IEEE 802.15.4 radio can run Zigbee instead of Thread when the Zigbee protocol stack is selected.

Nano ESP32 Has ESP-NOW Instead

Nano ESP32 supports ESP-NOW, Espressif’s peer-to-peer wireless protocol.

ESP-NOW is useful for:

• remote sensors;
• wireless controllers;
• low-latency links;
• small device groups;
• applications that do not need an access point.

ESP-NOW and Thread are not equivalent protocols, but they solve some overlapping “small wireless device network” problems in very different ways.

CPU Performance: Nano ESP32 Is Much Faster

Nano ESP32’s ESP32-S3 provides:

Nano Matter’s MGM240S provides:

For general application computing, large buffers and complex networking, Nano ESP32 has much more headroom.

8 MB PSRAM Is a Major Nano ESP32 Advantage

Nano ESP32 includes:

This is useful for:

• large JSON documents;
• graphics buffers;
• audio buffers;
• machine-learning workloads;
• large network packets;
• MicroPython heaps;
• web applications.

Nano Matter has 256 kB RAM, which is perfectly reasonable for an embedded Thread/Matter device but is a very different memory class.

Flash Capacity

Nano ESP32 includes:

Nano Matter provides:

This again reflects the intended workloads.

Nano ESP32 is comfortable with:

• large firmware;
• filesystems;
• OTA partitions;
• web assets;
• MicroPython files.

Nano Matter is designed around more tightly controlled embedded radio applications.

Matter Stack Memory Overhead

Matter is not lightweight.

The current Silicon Labs Arduino core specifically warns that selecting the Matter stack consumes significant Flash and RAM.

If you use Nano Matter only as a normal microcontroller, selecting:

leaves substantially more resources available to the sketch.

Both Are 3.3 V Boards

Neither board is 5 V tolerant.

Do not connect 5 V logic directly to the GPIO of:

• Nano ESP32;
• Nano Matter.

Use level shifting or 3.3 V peripherals.

Nano ESP32 Power Architecture

Arduino specifies:

There is no normal continuously available 5 V rail when the board is powered only from VIN.

Nano Matter Power Architecture Is Different

Nano Matter can be powered from USB-C or external 5 V paths through the Nano header.

Arduino also documents a low-power configuration where:

• the power LED jumper can be cut;
• 3.3 V can be supplied directly;
• the USB bridge is left unpowered.

This reflects Nano Matter’s stronger focus on battery/low-power IoT devices.

Analog Input

Both boards provide 12-bit ADC hardware.

Nano ESP32 exposes eight analog-labelled inputs:

split between ESP32-S3 ADC1 and ADC2 channels.

Nano Matter’s MGM240S provides a 12-bit ADC with a much larger internal set of possible analog channels, while the Nano header exposes the normal A0-A7 positions.

Nano ESP32 ADC Has Wi-Fi/ADC2 Considerations

On Nano ESP32:

For Wi-Fi-heavy analog applications, A0-A3 are the safer default because ADC2 has more resource-sharing constraints.

Nano Matter Has True DAC Hardware

This is a significant advantage for mixed-signal applications.

Nano Matter’s MGM240S supports up to:

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

Nano ESP32’s ESP32-S3 has no true voltage DAC.

If You Need Analog Output

Choose Nano Matter when a genuine analog voltage output is important.

On Nano ESP32, use:

• PWM plus filtering;
• an external I²C/SPI DAC;
• I²S with an external codec/DAC.

PWM

Both architectures provide flexible PWM, but they implement it differently.

Nano ESP32 uses ESP32-S3 LEDC-style PWM resources that can be routed to many suitable GPIO.

Nano Matter’s documentation states that all exposed I/O are PWM-capable, with:

So “all pins can PWM” does not mean Nano Matter has 22 independent PWM generators.

I²C, SPI and UART

Both boards expose the familiar Nano-compatible defaults:

Nano Matter additionally exposes a second hardware I²C mapping and second SPI mapping in its pinout/core architecture.

Nano ESP32 instead benefits from the ESP32-S3 GPIO matrix, which allows many peripheral signals to be reassigned to different free GPIO.

USB Architecture

Nano ESP32

The ESP32-S3 directly supports native USB.

This gives:

• USB serial;
• programming;
• native USB device functions;
• USB/JTAG debugging.

Nano Matter

Nano Matter provides USB-C for power/data and exposes SWD debugging through its onboard debugging/bridge architecture.

The main MGM240S application processor is developed primarily through the Silicon Labs/SWD model rather than the ESP32-S3 native USB device model.

Debugging

Both boards can be debugged without immediately buying a separate external probe.

Nano ESP32 benefits from ESP32-S3’s built-in USB/Serial-JTAG functionality.

Nano Matter exposes SWD debugging over the board’s USB/debug architecture and is supported by OpenOCD in the current Silicon Labs Arduino core.

MicroPython

Nano ESP32 has official Arduino MicroPython support.

The combination of:

makes it a much more comfortable Python platform.

Nano Matter is primarily positioned around Arduino C/C++ plus the Silicon Labs Matter/Zigbee/BLE stacks rather than as a general MicroPython board.

Arduino Cloud

Nano ESP32 is directly positioned by Arduino as an Arduino Cloud IoT board.

Nano Matter can also be used within Arduino’s connected ecosystem, but its defining networking model is Matter/Thread rather than conventional cloud-over-Wi-Fi operation.

Home Assistant: Two Very Different Paths

Nano ESP32

A common path is:

or another ESP32-native integration.

Nano Matter

A common path is:

The second path is more infrastructure-heavy but gives standards-based Matter interoperability.

Battery-Powered Devices

Nano Matter’s radio architecture is specifically aimed at low-power mesh IoT.

Thread devices can sleep aggressively while remaining part of the mesh architecture, depending on their Thread device role.

Nano ESP32 also supports deep sleep and Arduino quotes very low ESP32-S3 SoC sleep currents, but Wi-Fi is fundamentally a different radio/network workload.

For a tiny sleepy smart-home sensor, Thread can be the more natural architecture.

High-Bandwidth Applications

Nano ESP32 is the clear fit for:

• web servers;
• large OTA firmware;
• high-rate network data;
• audio streaming;
• large buffers;
• complex JSON;
• Wi-Fi-connected displays;
• MicroPython applications.

Nano Matter is not intended to replace a Wi-Fi board for high-bandwidth networking.

Smart Lights, Switches and Sensors

For a new smart-home accessory intended to join a Matter-over-Thread ecosystem:

is the direct architectural choice.

For a device that needs:

• a local web UI;
• MQTT;
• REST;
• direct Wi-Fi;
• ESPHome-style workflows;

Nano ESP32 is more natural.

Security Architecture

Nano Matter uses Silicon Labs Secure Vault technology as part of the MGM240S platform.

This aligns well with Matter’s strong dependence on:

• device identity;
• secure commissioning;
• cryptographic credentials;
• encrypted sessions.

ESP32-S3 also includes substantial hardware security features, secure boot and Flash-encryption support, but the software/provisioning workflows are different.

Nano ESP32 Pin Numbering Is More Complicated

Nano ESP32 has an Arduino-specific pin numbering layer over raw ESP32-S3 GPIO numbers.

For example:

Use symbolic names such as D2 and A0 rather than bare integers.

Nano Matter uses a more conventional Arduino pin abstraction without the same “Arduino number vs raw ESP GPIO number” trap.

Software Ecosystem

Nano ESP32

You get access to:

• Arduino-ESP32;
• ESP-IDF concepts and libraries;
• ESP-NOW;
• Wi-Fi libraries;
• BLE libraries;
• MicroPython;
• a huge ESP32 community.

Nano Matter

You get:

• Silicon Labs Arduino core;
• Matter library;
• OpenThread;
• Zigbee library;
• ArduinoBLE compatibility;
• Silicon Labs BLE APIs;
• Secure Vault ecosystem.

Which One Is Easier?

For general IoT work, Nano ESP32 is usually conceptually simpler:

Matter/Thread development introduces more infrastructure:

• commissioning;
• device types;
• Thread credentials;
• Border Router;
• Matter controller;
• persistent provisioning data.

That complexity exists because Matter/Thread is solving interoperability and low-power mesh problems that ordinary Wi-Fi does not solve in the same way.

Which Board Should You Choose?

Requirement	Better fit
Direct Wi-Fi	Nano ESP32
MQTT	Nano ESP32
Local web server	Nano ESP32
MicroPython	Nano ESP32
ESP-NOW	Nano ESP32
Large RAM/PSRAM	Nano ESP32
Matter over Thread	Nano Matter
Native Thread	Nano Matter
Zigbee	Nano Matter
Low-power mesh sensor	Nano Matter
True DAC output	Nano Matter
High-bandwidth networking	Nano ESP32
Home Assistant through MQTT/API	Nano ESP32
Home Assistant through Matter/Thread	Nano Matter

Quick Reference

Final Thoughts

Nano ESP32 and Nano Matter are not direct replacements for each other.

They represent two different IoT architectures.

Choose Nano ESP32 when you want:

• Wi-Fi;
• high performance;
• large memory;
• ESP32 libraries;
• MicroPython;
• MQTT, HTTP or direct IP networking.

Choose Nano Matter when you want:

• Thread;
• Matter-over-Thread;
• Zigbee;
• low-power mesh;
• BLE commissioning;
• smart-home interoperability.

The simplest decision rule is:

For the detailed pinouts, see our Nano ESP32 pinout guide and Nano Matter pinout guide.