2-Channel SPST Relay Module for M5Stack – GPIO I2C Grove

2-Channel SPST Relay Unit Module for M5Stack

Take your automation and DIY electronics projects to the next level with this compact, powerful 2-Channel SPST Relay Unit Module designed for M5Stack. Whether you're building smart home controllers, industrial prototypes, or creative maker projects, this relay module delivers reliable switching performance with minimal setup.

Made in Mainland China.

Key Features

• Powerful Switching Capability: Controls circuits up to DC 8A/28V or AC 8A/250V. Acts as an automatic switch, using a small control current to manage larger load currents — ideal for circuit switching and safety protection applications.
• Single Bus GPIO Control: Simple GPIO programming lets you output high or low logic levels to connect the common terminal (COM) to either the ON or OFF pins, making relay operation straightforward and efficient.
• Compact & Mountable Design: Measures just 56.0 × 24.0 × 19.0 mm and weighs only 0.34 oz. Includes 2 LEGO-compatible mounting holes for versatile installation in enclosures or project builds.
• Low Power Consumption: Runs at 5V with only 40mA current draw. Features a fast coil action time of just 6ms and release time of 4ms for rapid, responsive switching.
• Multi-Platform Development Support: Compatible with Arduino, UIFlow Blockly, and Python, making it accessible for beginners and experienced developers alike.
• Includes HY2.0-4P Grove Cable: Ready to connect right out of the box with the included Grove-compatible cable, compatible with M5Stack's Grove port ecosystem.

Specifications

Package Contents

• 1 × 2-Channel SPST Relay Unit Module
• 1 × HY2.0-4P Grove Cable

Note: Color may vary slightly due to monitor settings and lighting conditions. Measurement tolerance is ±1–3cm.

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Frequently Asked Questions

Q: What programming languages and platforms are compatible with this 2-channel relay module?

A: This relay module is compatible with Arduino (C/C++), UIFlow Blockly (visual block programming), and Python, making it a flexible choice for a wide range of M5Stack and ESP-series automation projects.

Q: What is the maximum load this relay module can safely switch?

A: Each relay channel is rated for up to DC 8A at 28V or AC 8A at 250V. This allows the module to safely control a variety of household and industrial electrical loads from a low-power microcontroller signal.

Q: How does the Grove port interface work with M5Stack?

A: The module uses a standard HY2.0-4P Grove connector, which plugs directly into any M5Stack Grove port. The included Grove cable makes the connection tool-free and straightforward, supporting both GPIO and I2C communication modes.

Q: Is this relay module suitable for beginners in electronics?

A: Yes! The single-bus GPIO control design means you only need to output a high or low signal to switch the relay on or off. Combined with UIFlow Blockly's drag-and-drop interface, even beginners can integrate this module into their projects quickly.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.