Shelly 1 Gen4 — Single-Channel Multi-Protocol WiFi+Zigbee+Matter Relay

Shelly 1 Gen4 — Multi-Protocol Relay

The Shelly 1 Gen4 (model S4SW-001X16EU) is a fourth-generation 1-channel WiFi relay that combines WiFi 802.11 b/g/n/ax, Zigbee 3.0, Bluetooth BLE 5.0, and Matter in a single compact device. It supports neutral-free installation and features a dry contact output, making it compatible with any type of load or low-voltage circuit. No hub or subscriptions needed.

Official Model: S4SW-001X16EU

Main Features:

• 1-channel relay, 16A max — dry contact (no neutral required)
• Power supply: 110-240V AC / 24-48V DC / 12V DC
• Quad connectivity: WiFi ax + Zigbee 3.0 + BT 5.0 + Matter
• Compact dimensions: 37 × 42 × 16 mm / 26 g
• Compatible with Home Assistant, Alexa, Google Home
• mJS scripting, MQTT, HTTP REST API, Webhooks

Use Cases:

• Lighting automation in homes and offices
• Circuit control with existing Zigbee installations
• Integration with alarms and security systems (dry contact)
• DIY multi-protocol home automation projects

Integrations: Home Assistant (local, no cloud), Amazon Alexa, Google Home, Matter, MQTT, HTTP REST API, mJS scripting.

• RF Band: 2400 - 2495 MHz
• Max RF Power: <20 dBm
• Wi-Fi Protocol: 802.11 b/g/n/ax (2.4 GHz)
• Wi-Fi Range: Up to 30 m indoors / 50 m outdoors
• Bluetooth Protocol: BLE 5.0
• Bluetooth Range: Up to 10 m indoors / 30 m outdoors
• Zigbee 3.0 (coordinator or router)
• Matter (over WiFi)

Documentation & Resources:

• Official Knowledge Base — Shelly 1 Gen4
• API Documentation — This device
• API Documentation — All Shelly devices and services

Installation Guides:

• Shelly 1 Gen4 Installation Guide
• Web Interface Guide

Certifications & Compliance:

• CE, RoHS, Matter