M5Stack ATOM HUB AC/DC Remote Control Switch Kit

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Dual-Channel Wi-Fi and RS485 Relay Switch Kit with Atom-Lite Controller
The M5Stack K042 Atom Hub AC/DC Remote Control Switch Kit is a programmable dual-channel relay controller designed for remotely switching AC or DC loads. The kit combines the Atom Switch base with an included Atom-Lite controller, allowing two independent circuits to be controlled through Wi-Fi, RS485, or custom embedded logic. Each relay channel supports loads up to 250VAC/10A, with an instantaneous current rating of 16A, making the kit suitable for smart switching, automation, lighting control, and equipment-control applications.
The Atom Switch integrates an AC-DC power circuit that provides 5V/1A power to the Atom controller and also supports 924V DC power through the RS485 interface. An onboard SP485EE transceiver enables RS485 communication and Modbus-based integration with industrial and building-automation networks. The HY2.0-4P Port A interface provides additional I2C or GPIO expansion. Short-circuit and overheat protection are integrated into the power circuitry, while the included rail clamp supports convenient installation in control systems.
Key Features

Dual-channel programmable relay switch
Includes M5Stack Atom-Lite ESP32 controller
2 independent relay channels
Relay rating up to 250VAC/10A
16A instantaneous relay current
Relay contacts provide NO, NC, and COM connections
Built-in AC-DC power-supply circuit
Provides 5V/1A DC power to the Atom controller
924V DC power input through RS485 interface
Integrated SP485EE RS485 transceiver
Supports Modbus communication
Wi-Fi remote-control capability through Atom-Lite
RS485 control for industrial communication
Multiple Atom Switch units can be connected through RS485
HY2.0-4P Port A expansion interface
Supports I2C peripherals and general-purpose I/O
Short-circuit protection
Overheat protection
PC plastic enclosure
Rail-mount hardware included
Suitable for smart switching and automation systems

Applications

Smart switches
Wi-Fi-controlled lighting
Home automation
Building automation
Industrial relay control
Remote equipment switching
Pump and valve control
Fan and ventilation control
IoT appliance control
RS485 automation networks
Modbus-controlled devices
Scheduled switching systems
Remote power-control projects

Model Size

Package Includes:
1 x Atom-Lite1 x Atom Switch1 x Double-sided tape1 x Rail clamp1 x HT3.96-4P terminal3 x 3.96 x 3P male headers1 x M4 hex key1 x M2 hex key2 x M4 x 10 mm hex socket head screws1 x M2 x 20 mm hex socket head machine screw1 x I/O Sticker