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How to Set Up 2-Way or Wireless Multiway Switching with Lightwave

This article explains how to set-up 2-way, intermediate & multi-way switching setups with Lightwave dimmers

For a more detailed, step-by-step explanation of wiring configurations, please refer to the Two-Way Switching Wiring Guide and Installation Manuals. This will help you identify your current setup and determine the best option for your installation.

With Lightwave Smart Series dimmers, there are two ways to achieve two-way or multiway switching:

Recommended: Wireless Multiway Switching

One dimmer is physically wired (the “master”), while additional dimmers operate wirelessly via app automation. This method does not require internet connectivity once set up.

Alternative: Traditional Wiring

For properties with existing two-way or three-way wiring, Lightwave dimmers can also be installed using conventional wiring methods.

Option 1: Wireless Multiway Switching (Recommended)

Lightwave’s clean and modern approach removes the need for complex cabling.

Key Requirements

  • Only one dimmer is wired directly to the lighting circuit (master).
  • Secondary (slave) dimmers must have:
    • Permanent Live and Neutral, or
    • A connection to a separate dimmable lighting circuit linked to the primary channel (labelled dimmer 1 on the device), ensuring constant power.

Benefits

  • No need for three-core wiring
  • Supports any number of switches
  • Reliable operation—even without internet
  • Spare gangs can be repurposed as “Magic Buttons” for automations

Best Practice Summary

  • Wire dimmers as one-way only and safely terminate any three-core cable. The left-hand side of the dimmer may be left unconnected to enable wireless multi-way switching via the app.
  • Master dimmer: connect Live + Switched Live
  • Secondary dimmers: provide permanent Live + Neutral
  • In the app, secondary dimmers display an “S” symbol once configured
  • Consider placing secondary dimmers in a separate room in the app for better organisation

Option 2: Traditional Wiring (For Existing Circuits)

This method allows reuse of existing two-way wiring setups.

Before You Begin

  • Turn off power at the consumer unit
  • Take photos of existing wiring before removal
  • Consult a qualified electrician if unsure

Identify Your Wiring System

  • Three-Wire System: Each switch has one wire in L1, L2, and C
  • Two-Wire System: One switch has multiple wires in L1 and L2, the other does not

(Refer to the Two-Way Wiring Guide for diagrams and visual examples.)

Two-Wire System Wiring

  • Move wires from L1 → L terminal
  • Move wires from L2 → X terminal
  • Wires in C are not required and should be safely terminated

Three-Wire System Wiring

  • First switch: L1 → L, L2 → X, C → L
  • Second switch: L1 → L, L2 → X, C → X

Intermediate Switching (More Than Two Switches)

If an intermediate switch is present (with dual L1/L2 terminals):

  • Connect one set to L
  • Connect the other set to X

Then complete setup using the Two-Way Switching automation in the app.

App Setup (Required for Both Methods)

  1. Open the Lightwave app (starts on the Favourites page)
  2. Tap the green + icon → select Automations
  3. Choose Two-Way Switching
  4. Select the relevant dimmers (e.g. Hallway circuit)
  5. Tap Next and choose the master device
  6. Name the automation → tap Done

The master dimmer will flash green and white during calibration. Once it stops and turns off, setup is complete.

Extra Tips

  • Minimum Load: Ensure at least 10W per wired dimmer (especially for traditional wiring)
  • Magic Buttons: Spare gangs can control scenes or other devices
  • Calibration: Always complete calibration in the app
  • Power for Slave Dimmers: Must have constant power (Live & Neutral or via dimmable circuit connection)

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