M5Stack Chain Dual Key with ESP32-S3

🔗 Chain DualKey — Smart Control, Compact Form Chain DualKey is a programmable dual-key input development board powered by the ESP32-S3FN8 main control chip. On the front, it features 2 hot-swappable blue switch mechanical keys 🔵 and 2 programmable RGB LEDs 🌈 — delivering tactile feedback and vibrant interaction.

🔋 Built-in Power & Efficiency Equipped with a 350mAh lithium battery and optimized for low-power operation, it offers reliable battery life for portable setups.

🧠 Pre-installed Macro Firmware Comes ready with Chain macro keyboard firmware, supporting USB and BLE connections. It can emulate HID input devices, making it ideal for custom control applications.

🌐 Web-Based Configuration Once powered on, connect to its AP hotspot and configure HID mappings via the built-in web interface — for both local control and expansion nodes.

🧩 Modular Expansion with M5Stack Chain Design Includes 2 HY2.0-4P expansion ports, supporting lateral connections to other sensors and modules. With USB-OTG support from the ESP32-S3, it’s perfect for:

• 🏠 Smart home automation

• ⌨️ Keyboard peripherals

• 🎮 Macro key setups

• 🧪 Custom control systems

✨ Features

• 🧠 ESP32-S3FN8 Main Control Chip — Powerful dual-core performance for smart applications

• 🔋 Built-in 350mAh Lithium Battery — Compact and energy-efficient for portable use

• 🌈 2 Programmable RGB LEDs — Customizable lighting for interactive feedback

• ⌨️ 2 Hot-Swappable Blue Switch Keys — Tactile mechanical input with easy replacement

• 🔗 M5Stack Chain Series Expandable Design — Modular connectivity for sensor expansion

• 🧱 LEGO-Compatible Mounting Holes — Creative integration with LEGO builds

• 🪢 Lanyard-Friendly Design — Easy to carry, perfect for wearable or mobile setups

Includes

• 1 x Chain DualKey
• 1 x Keycap Sticker

Specifications