Simple Bluetooth control

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Pairing a Shelly Relay/Dimmer with a Shelly BLU Wall Switch

Introduction

This guide explains how to easily pair a Shelly relay or dimmer with a Shelly BLU Wall Switch 4, BLU RC Button 4 and BLU Button Tough 1, allowing you to wirelessly control your Shelly devices via Bluetooth. The connection works even without internet or Wi-Fi, and supports smooth wireless dimming.

Pairing is completed in three simple steps:

  1. Activate pairing mode on the relay or dimmer.
  2. Activate pairing mode on the wall switch.
  3. Select the on/off button.

Once paired, the wall switch will function as follows:

  • Button 1: Turn on / Dim up
  • Button 2: Turn off / Dim down

Firmware Requirements

Shelly relay/dimmer:

  • Firmware version 1.7.0 or newer

Firmware on the Bluetooth wall switch:

  • Version 10.0.22 / 10.2.20: Supports basic on/off control
  • Version 10.0.23: Required for dimming functionality

Pairing Procedure

Step 1: Activate pairing mode (learning mode) on the relay/dimmer

Method 1: Manual activation using momentary switch

This method requires a 230V momentary switch connected to your dimmer or relay.

Instructions:

  1. Press the connected switch 4 times quickly.
  2. The relay or dimmer will blink to confirm that pairing mode is active.

Method 2: Activation via web interface

In this method, you access the web interface of your Shelly device from a browser on your PC, tablet, or phone.

  1. Connect to the device:
    1. Search for available Wi-Fi networks and connect to the one created by your Shelly relay or dimmer.
    2. If the device is already connected to your home Wi-Fi, skip to step
  2. Open the device interface:
    1. If the device is on your Wi-Fi, find its IP address in the Shelly app under Device Settings > Network.
    2. If you’re connected to the device’s access point, go to 192.168.33.1 in your browser.
  3. Enable pairing mode:
    • Click on the output/channel you want to pair.
    • Press “Start learning”.
    • The relay or dimmer will blink to confirm that pairing mode is active.

Step 2: Activate pairing mode on the Bluetooth wall switch

Instructions:

  1. Press and hold any two buttons on the wall switch for 10 seconds.
    The relay/dimmer will confirm with 2 blinks.
  2. Press the button you want to use for turning the light on.
    The relay/dimmer will confirm with 4 blinks.
  3. Pairing is now complete.

Step 3: Select the On/Off button

The wall switch uses two buttons to control a relay or dimmer. Once you select the on button, the opposite button will automatically be assigned as the off button.

See images for further clarification.

Explanation of On/Off buttons

The wall switch uses two buttons to control a relay or dimmer. Once you select the on button, the opposite button is automatically set as the off button.

See images for a detailed explanation.