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CoreMatrix 16 x 16 white LED matrix, front angled view

CoreMatrix back panel and connection labels

CoreMatrix white LED pixel display in use

CoreMatrix front view with 16 x 16 LED matrix

M5Stack CoreMatrix C158 hardware feature overview

M5Stack CoreMatrix Dev Kit (ESP32-C61)

SKU: M5-C158 Category: IoT Devices
Brand: MTools Tec

$39.99

ESP32-C61-powered IoT controller with a 16 × 16 white LED matrix, Wi-Fi 6, 16MB Flash and 8MB PSRAM.

BMI270 motion sensor, buzzer, three user buttons, microSD slot, M5-Bus and Grove expansion. Develop with UiFlow2 or Arduino.

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M5STACK COREMATRIX · C158

Give your IoT project a pixel interface.

Build status displays, animated icons and interactive sensor projects with a compact 16 × 16 white LED matrix controller.

CoreMatrix combines an ESP32-C61HR8 RISC-V processor, Wi-Fi 6, motion sensing and expansion interfaces in a 54 × 54 mm body.

16 × 16 LEDs | Wi-Fi 6
16MB Flash | 8MB PSRAM

Icons, animation and instant feedback

The 256-pixel white LED matrix displays simple graphics, device states and event reminders. A TM1680 driver controls the 16 × 16 display.

Motion input: BMI270 6-axis IMU for motion detection and orientation-based interaction.
Physical controls: three user buttons plus a dedicated power button.
Audio cues: onboard passive buzzer for alerts and feedback.

Connect sensors. Store data. Build more.

The 160MHz ESP32-C61HR8 pairs 16MB Flash and 8MB Quad PSRAM with 2.4GHz Wi-Fi 6 connectivity.

M5-Bus: connect compatible M5Stack expansion Modules.
HY2.0-4P Grove: connect compatible sensors and peripherals.
microSD slot: add removable storage for project data and assets.
USB: USB Type-C plus an MX1.25-4P USB expansion interface.

Flexible power for embedded projects

Power CoreMatrix through USB, a compatible 3.7V battery connection, or M5-Bus. Stamp Timer Power2 (M5PM1) and M5IOE1 handle charging and multi-level power management.

Power on / reset: single-click the power button.
Power off: double-click the power button.
Recovery: long-press the power button to force download mode if normal flashing fails.

Battery connector: MX1.25-2P. Charging current is selectable between 180mA and 650mA through CHG_PROG.

Technical specifications

Model / SKU	CoreMatrix / C158
Processor	ESP32-C61HR8, 32-bit single-core RISC-V, 160MHz
Flash / PSRAM	16MB Flash / 8MB Quad PSRAM
Wireless	2.4GHz Wi-Fi 6
Display	16 × 16 white LED matrix; TM1680 driver
Motion sensor	BMI270 6-axis IMU; interrupt wake-up support
Audio / buttons	MLT-8530 passive buzzer; 3 user buttons + power button
Storage expansion	microSD card slot
Expansion	M5-Bus; HY2.0-4P Grove; MX1.25-4P USB
Input power	USB 5V DC; battery 3.7V DC; M5-Bus 5V DC IN/OUT
Power management	Stamp Timer Power2 (M5PM1) + M5IOE1
Battery connector / charging	MX1.25-2P; 180mA default / 650mA selectable
Product dimensions / weight	54.0 × 54.0 × 11.6mm / 28.9g
Package dimensions / gross weight	132.0 × 95.0 × 16.0mm / 45.1g

Start with UiFlow2 or Arduino

Use UiFlow2 for graphical programming, or develop with Arduino and the M5Stack libraries. Official documentation includes pin mappings, power-control details, schematics and mechanical files.

Programming guides

Hardware and libraries

What’s included

1 × M5Stack CoreMatrix
1 × 2.0mm L-shaped hex key

Project ideas

Pixel icon displays, animated notifications, sensor data collection, device status indicators and interactive IoT prototypes.

Specifications

Processor	ESP32-C61HR8, 160MHz RISC-V
Display	16 × 16 white LED matrix
Memory	16MB Flash + 8MB PSRAM
Wireless	2.4GHz Wi-Fi 6
Manufacturer SKU	C158
Processor	ESP32-C61HR8, 160MHz RISC-V	Display	16 × 16 white LED matrix
Memory	16MB Flash + 8MB PSRAM	Wireless	2.4GHz Wi-Fi 6
Manufacturer SKU	C158

Processor	ESP32-C61HR8, 160MHz RISC-V
Display	16 × 16 white LED matrix
Memory	16MB Flash + 8MB PSRAM
Wireless	2.4GHz Wi-Fi 6
Manufacturer SKU	C158

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