Fusion Series Smart Two-Way Control Solutions

Introduction

If you use a SONOFF Fusion Series switch, you may be wondering how to achieve two-way control. This guide introduces smart two-way control solutions for Fusion switches with different communication protocols. By using smart scenes, these solutions enable multi-location control without additional wiring — flexible, convenient, and highly practical.

 

 

Solution 1 — Smart Scene Linkage

In the eWeLink or Home Assistant platform, Zigbee wireless buttons (e.g., SNZB-01P / SNZB-01M) can be used as scene triggers via smart scene or automation configuration. They link with Fusion Series switches to perform on/off actions, enabling wireless two-way control.

Required Devices

✅1 × Fusion Series switch (e.g., Orb-MW1 / Orb-MW2 / Orb-ZBW1 / Orb-ZBW1L / Orb-ZBW2 / Orb-ZBW2L)
✅1 × Zigbee wireless button (e.g., SNZB-01P / SNZB-01M)

✅1 × Zigbee gateway (e.g., SONOFF ZBBridge-P / ZBBridge-U / NSPanel Pro / iHost)

Note: If you intend to add devices to a ZHA or Z2M environment, you are also required to have a Zigbee Dongle (e.g., SONOFF Dongle Plus MG24 / Dongle Max / ZBDongle-P/E / Dongle Lite MG21)

 

Pairing & Scene Setup

Step 1: Add Devices to the APP

Add the Zigbee wireless button (SNZB-01P / SNZB-01M) and the Fusion switch to the eWeLink APP or Home Assistant platform.

Step 2: Create an automation scene

• Set trigger: Select "Smart Device" → Choose SNZB-01P or SNZB-01M (for SNZB-01M, select the target button) → Select trigger (Single press / Double press / ...)
• Set action: Select "Smart Device" → Choose the target Fusion Zigbee switch (for multi-channel switches, select the target channel) → Select action (Reverse)
• Save and enable the automation scene.

Step 3: Verify

Press the Zigbee wireless button to trigger the scene. The light connected to the Fusion switch should turn on/off accordingly. Both the wall switch and the Zigbee wireless button can control the same light synchronously.

 

 

Solution 2 — Detach Relay

Switch A is connected to the load, while Switch B has Relay Detach Mode enabled and serves as a wireless scene trigger. Through smart scene linkage, a single press on Switch B toggles the state of Switch A, allowing two devices to control the same light.

Required Devices

✅ 2 × Fusion switches (e.g., Orb-MW1 / Orb-MW2 / Orb-ZBW1 / Orb-ZBW1L / Orb-ZBW2 / Orb-ZBW2L)

Note:

• For Zigbee devices, a Zigbee gateway is required (e.g., SONOFF ZBBridge-P / ZBBridge-U / NSPanel Pro / iHost).
• If you intend to add devices to a ZHA or Z2M environment, the Zigbee Dongle is also required (e.g., SONOFF Dongle Plus MG24 / Dongle Max / ZBDongle-P/E / Dongle Lite MG21).

 

Pairing & Setup Steps

Step 1: Wiring Preparation

• Switch A: Connected to the load light.
• Switch B: Not connected to any load, used solely as a scene trigger.

Step 2: Add Devices to the APP and Enable Relay Detach Mode

Add both Fusion switches to the eWeLink APP. For Zigbee devices, you may also add them to a Z2M or ZHA platform and enable Relay Detach Mode.

Step 3: Create an Automation Scene

• Set trigger: Select "Smart Device" → Choose "Switch B" (for multi-channel switches, select the target channel) → Select trigger (Single Press).
• Set action: Select "Smart Device" → Choose "Switch A" (for multi-channel switches, select the target channel) → Select action (Reverse).
• Save and enable the automation scene.

Step 4: Verify

Press Switch B to trigger the scene. The light connected to Switch A should turn on/off accordingly. Both switches can control the same light synchronously.

 

 

Solution 3 — Binding Linkage (Suitable for Home Assistant Only)

In ZHA (Zigbee Home Automation) or Z2M (Zigbee2MQTT) environments, the Zigbee wireless button, as a trigger device, can establish a binding relationship with a Fusion Zigbee switch (as the target). This enables direct device-to-device communication control, achieving wireless two-way control.

Required Devices

✅ 1 × Zigbee wireless button (e.g., SNZB-01P / SNZB-01M)
✅ 1 × Fusion Series Zigbee switch (e.g., Orb-MW1 / Orb-ZBW1L / Orb-ZBW2 / Orb-ZBW2L)
✅ 1 × Zigbee Dongle (e.g., SONOFF  Dongle Plus MG24 / Dongle Max / ZBDongle-P/E / Dongle Lite MG21).

 

Pairing & Scene Setup

Step 1: Add devices to the Zigbee gateway

Add devices via the ZBDongle to the ZHA or Z2M environment.

Step 2: Binding

• In ZHA/Z2M, select the trigger device (e.g., SNZB-01M) and go to Binding management.
• Select the target device (e.g., Zigbee switch product) and specify the Cluster (e.g., On/Off Cluster).
• Once binding is complete, pressing the corresponding button on the trigger device will directly control the target device (On / Off / Reverse).

Step 3: Verify

Press the Zigbee wireless button to trigger the scene. The light connected to the Fusion switch should turn on/off accordingly. Both the wall switch and the Zigbee wireless button can control the same light synchronously.