Wireless dimming

Wireless dimming between Shelly Plus I4 and Shelly Dimmer 2

In this guide, we describe how to control a Shelly Dimmer 2 wireless from a Shelly Plus I4 input module.

We will be working from the web interface of the Shelly devices.

We will use a script to emulate the dimming functionality. When the script is set up, you get the following functionality:

Single push: on/off
Double short push: 100 % light
Long push: Brightness up/down

Step 1: Access the device's web interface

Find the device’s IP address in your router, via the Shelly Smart Control App or control.shelly.cloud

Access the device’s web interface by typing its IP address into a browser.

Step 2: update firmware

Make sure your Shelly Plus I4 is updated to the latest firmware.

Press the “cog wheel”
Tap firmware
Update to the latest firmware

Step 3: Set input mode to "button".

Tap the home icon
Select the input you want to use
Press “See more” under Input mode
Select “Button” under input mode

Step 4: Insert and prepare script

Turn on Websocket debug

In order to see the status in the log, we must first turn on WebSocket debug (this is not necessary).

Press the “cog wheel”.
Select Debug.
Check “Enable Websocket Debug”
Press “Save Settings”

Insert script

Tap the script icon (<>)
Press “Create new script”
Give your script a name

Now copy the entire code below into the new script.
(Press Copy in the top right corner of the script)

/**
 * @copyright shelly-tools contributors
 * @license   GNU Affero General Public License (https://www.gnu.org/licenses/agpl-3.0.de.html)
 * @authors   https://github.com/shelly-tools/shelly-script-examples/graphs/contributors
 *
 * This script is intended to remote control a Shelly Dimmer / Dimmer2 and emulates the locally conencted button.
 * short_press = on/off toggle, double_press = on with 100% brightness, long_press cylce between dimming and brightening.
 */

// CONFIG START
// IP address / hostname from Shelly Dimmer device
let REMOTE = {
    ip: '192.168.178.166',
    input: 0, // ID from the push button: 0 for Shelly Plus 1 / Plus 1 PM or 0,1,2 or 3 for the Shelly I4.

};
// CONFIG END 

let dim = false;
let up = false;

// add an evenHandler for button type input and various push events
Shelly.addEventHandler(
    function (event, user_data) {
        //print(JSON.stringify(event));
        if (typeof event.info.event !== 'undefined') {
            if (dim === true && event.info.event === 'btn_up' && event.info.id === REMOTE.input) {
                dim = false;
                print("release");
                Shelly.call(
                    "http.get", {
                    url: 'http://' + REMOTE.ip + '/light/0?dim=stop'
                },
                    function (response, error_code, error_message, ud) { },
                    null
                );
            }

            if (event.info.event === 'single_push' && event.info.id === REMOTE.input) {
                Shelly.call(
                    "http.get", {
                    url: 'http://' + REMOTE.ip + '/light/0?turn=toggle'
                },
                    function (response, error_code, error_message, ud) { },
                    null
                );
            } else if (event.info.event === 'double_push' && event.info.id === REMOTE.input) {
                Shelly.call(
                    "http.get", {
                    url: 'http://' + REMOTE.ip + '/light/0?turn=on&brightness=100'
                },
                    function (response, error_code, error_message, ud) { },
                    null
                );
            } else if (event.info.event === 'long_push') {
                dim = true;

                if (up === true) {
                    up = false;
                    Shelly.call(
                        "http.get", {
                        url: 'http://' + REMOTE.ip + '/light/0?dim=down&step=100'
                    },
                        function (response, error_code, error_message, ud) { },
                        null
                    );

                } else {
                    up = true;
                    Shelly.call(
                        "http.get", {
                        url: 'http://' + REMOTE.ip + '/light/0?dim=up&step=100'
                    },
                        function (response, error_code, error_message, ud) { },
                        null
                    );

                }
                print("cycle");


            } else {
                return true;
            }
        } else {
            return true;
        }
    },
);

Trin 5: Konfigurer script

Find and change IP address

When the script is copied in, find line 13.

On the line:
ip: ip: ‘192.168.178.166’, (line 13)

Insert the IP address of your Shelly Dimmer 2.

If your Dimmer has the IP address 192.168.1.34, then this is what you should change it to.

Before

let REMOTE = {
    ip: '192.168.178.166',
    input: 0, // ID from the push button: 0 for

After

let REMOTE = {
    ip: '192.168.1.34',
    input: 0, // ID from the push button: 0 for

Find and change input

Now you have to define which input on your Shelly Plus I4 you have connected to your switch. Shelly Plus I4 has four inputs which are designated from input 0-3. So if you want to use input 1 (SW1) to control your dimmer, then you must use ID 0.

input: ip: 0′, (line 14)

Examples of SW (switch) versus id.
SW1 = id: 0
SW2 = id: 1
SW3 = id: 2 <
SW4 = id: 3 <

let REMOTE = {
    ip: '192.168.178.166',
    input: 0, // ID from the push button: 0 for

Step 6: Closing

Save script

After this, press “Save” and “Start” at the top
Press the script icon again
In addition to the script name, the button to the right must be active in order for the script to start automatically after a power cut

Now, you’re done.