Wireless dimming

Wireless dimming

Wireless dimming between Shelly Plus I4 and Shelly Dimmer 2 / Pro Dimmer

Danish guide, click here

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)

Script for controlling Dimmer 2 
/**
 * @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.
 */

// Array of dimmers to be controlled
let dimmer = [
    '192.168.61.240', // dimmer controlled with button 0 
//    '192.168.61.241', // dimmer controlled with button 1 
//    '192.168.61.242', // dimmer controlled with button 2 
//    '192.168.61.243', // dimmer controlled with button 3 
];
// CONFIG END 

let dimstate = [
    false,
    false,
    false,
    false,
];

let up = [
    false,
    false,
    false,
    false,
];



// add an evenHandler for button type input and various push events
Shelly.addEventHandler(
    function (event) {
        if (typeof event.info.event !== 'undefined') {
            let i = event.info.id;

            if (typeof dimmer[i] !== 'undefined') {

                if (dimstate[i] === true && event.info.event === 'btn_up') {
                    dimstate[i] = false;
                    print("release");
                    Shelly.call(
                        "http.get", {
                        url: 'http://' + dimmer[i] + '/light/0?dim=stop'
                    },
                        function (response, error_code, error_message, ud) { },
                        null
                    );
                }

                if (event.info.event === 'single_push') {
                    Shelly.call(
                        "http.get", {
                        url: 'http://' + dimmer[i] + '/light/0?turn=toggle'
                    },
                        function (rs, ec, em) { },
                        null
                    );
                } else if (event.info.event === 'double_push') {
                    Shelly.call(
                        "http.get", {
                        url: 'http://' + dimmer[i] + '/light/0?turn=on&brightness=100'
                    },
                        function (rs, ec, em) { },
                        null
                    );
                } else if (event.info.event === 'long_push' && up[i]) {
                    dimstate[i] = true;
                    up[i] = false;
                    print("cycle");
                    Shelly.call(
                        "http.get", {
                        url: 'http://' + dimmer[i] + '/light/0?dim=down&step=100'
                    },
                        function (rs, ec, em) { },
                        null
                    );

                } else if (event.info.event === 'long_push' && up[i] === false) {
                    dimstate[i] = true;
                    up[i] = true;
                    print("cycle");
                    Shelly.call(
                        "http.get", {
                        url: 'http://' + dimmer[i] + '/light/0?dim=up&step=100'
                    },
                        function (rs, ec, em) { },
                        null
                    );
                }
                
                else {
                    return true;
                }
            }
        } else {
            return true;
        }
    },
);

For the Pro dimmer there are two scripts.
One for controlling Channel 1 and another for Channel 2
Now copy the entire code below into the new script.
(Press Copy in the top right corner of the script)

Script for controlling Pro Dimmer 1PM Ch.1 (Requires Firmware 1.4+) 
/**
 * @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.
 */
 
// Array of dimmers to be controlled
let dimmer = [
    '192.168.61.240', // dimmer controlled with button 0 
//    '192.168.61.241', // dimmer controlled with button 1 
//    '192.168.61.242', // dimmer controlled with button 2 
//    '192.168.61.243', // dimmer controlled with button 3 
];
// CONFIG END 
 
let dimstate = [
    false,
    false,
    false,
    false,
];
 
let up = [
    false,
    false,
    false,
    false,
];
 
 
 
// add an evenHandler for button type input and various push events
Shelly.addEventHandler(
    function (event) {
        if (typeof event.info.event !== 'undefined') {
            let i = event.info.id;
 
            if (typeof dimmer[i] !== 'undefined') {
 
                if (dimstate[i] === true && event.info.event === 'btn_up') {
                    dimstate[i] = false;
                    print("release");
                    Shelly.call(
                        "http.get", {
                        url: 'http://' + dimmer[i] + '/rpc/Light.DimStop?id=0'
                    },
                        function (response, error_code, error_message, ud) { },
                        null
                    );
                }
 
                if (event.info.event === 'single_push') {
                    Shelly.call(
                        "http.get", {
                        url: 'http://' + dimmer[i] + '/light/0?turn=toggle'
                    },
                        function (rs, ec, em) { },
                        null
                    );
                } else if (event.info.event === 'double_push') {
                    Shelly.call(
                        "http.get", {
                        url: 'http://' + dimmer[i] + '/rpc/light.set?id=0&on=true&brightness=100'
                    },
                        function (rs, ec, em) { },
                        null
                    );
                } else if (event.info.event === 'long_push' && up[i]) {
                    dimstate[i] = true;
                    up[i] = false;
                    print("cycle");
                    Shelly.call(
                        "http.get", {
                        url: 'http://' + dimmer[i] + '/rpc/Light.DimDown?id=0&fade_rate=4'
                    },
                        function (rs, ec, em) { },
                        null
                    );
 
                } else if (event.info.event === 'long_push' && up[i] === false) {
                    dimstate[i] = true;
                    up[i] = true;
                    print("cycle");
                    Shelly.call(
                        "http.get", {
                        url: 'http://' + dimmer[i] + '/rpc/Light.DimUp?id=0&fade_rate=4'
                    },
                        function (rs, ec, em) { },
                        null
                    );
                }
 
                else {
                    return true;
                }
            }
        } else {
            return true;
        }
    },
);
Script for controlling Pro Dimmer 1PM/2PM Ch. 2 (Requires Firmware 1.4+) 
/**
 * @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.
 */
 
// Array of dimmers to be controlled
let dimmer = [
    '192.168.61.240', // dimmer controlled with button 0 
//    '192.168.61.241', // dimmer controlled with button 1 
//    '192.168.61.242', // dimmer controlled with button 2 
//    '192.168.61.243', // dimmer controlled with button 3 
];
// CONFIG END 
 
let dimstate = [
    false,
    false,
    false,
    false,
];
 
let up = [
    false,
    false,
    false,
    false,
];
 
 
 
// add an evenHandler for button type input and various push events
Shelly.addEventHandler(
    function (event) {
        if (typeof event.info.event !== 'undefined') {
            let i = event.info.id;
 
            if (typeof dimmer[i] !== 'undefined') {
 
                if (dimstate[i] === true && event.info.event === 'btn_up') {
                    dimstate[i] = false;
                    print("release");
                    Shelly.call(
                        "http.get", {
                        url: 'http://' + dimmer[i] + '/rpc/Light.DimStop?id=1'
                    },
                        function (response, error_code, error_message, ud) { },
                        null
                    );
                }
 
                if (event.info.event === 'single_push') {
                    Shelly.call(
                        "http.get", {
                        url: 'http://' + dimmer[i] + '/light/1?turn=toggle'
                    },
                        function (rs, ec, em) { },
                        null
                    );
                } else if (event.info.event === 'double_push') {
                    Shelly.call(
                        "http.get", {
                        url: 'http://' + dimmer[i] + '/rpc/light.set?id=1&on=true&brightness=100'
                    },
                        function (rs, ec, em) { },
                        null
                    );
                } else if (event.info.event === 'long_push' && up[i]) {
                    dimstate[i] = true;
                    up[i] = false;
                    print("cycle");
                    Shelly.call(
                        "http.get", {
                        url: 'http://' + dimmer[i] + '/rpc/Light.DimDown?id=1&fade_rate=4'
                    },
                        function (rs, ec, em) { },
                        null
                    );
 
                } else if (event.info.event === 'long_push' && up[i] === false) {
                    dimstate[i] = true;
                    up[i] = true;
                    print("cycle");
                    Shelly.call(
                        "http.get", {
                        url: 'http://' + dimmer[i] + '/rpc/Light.DimUp?id=1&fade_rate=4'
                    },
                        function (rs, ec, em) { },
                        null
                    );
                }
 
                else {
                    return true;
                }
            }
        } else {
            return true;
        }
    },
);

Step 5a: Configure script (1 Channel)

Find and change IP address​

When the script is pasted, navigate to lines 12-15.

There are four lines containing IP addresses. Each line/IP address corresponds to an input on the Shelly I4.

If you want the first input (0) on the I4 to control a Dimmer 2 with the IP address 192.168.1.34, you need to modify the IP in the first line to match.

If you also want input 2 (1) to operate another Dimmer 2, remove the double slashes // and update that line with the IP address of the corresponding Dimmer 2. Repeat this process for the remaining inputs.

Before
let dimmer = [
    '192.168.61.240', // dimmer controlled with button 0 
//    '192.168.61.241', // dimmer controlled with button 1 
//    '192.168.61.242', // dimmer controlled with button 2 
//    '192.168.61.243', // dimmer controlled with button 3
After
let dimmer = [
    '192.168.1.34', // dimmer controlled with button 0 
    '192.168.1.57', // dimmer controlled with button 1 
//    '192.168.61.242', // dimmer controlled with button 2 
//    '192.168.61.243', // dimmer controlled with button 3

Step 5b: Configure script (2 channel Pro Dimmer)

Example when we want to control both Ch.1 and Ch.2 from input 0 and 1 on the same device

Enter a fictional IP address on the first line; otherwise, the script won’t recognize input from  input 1.

Script for controlling Ch.1
let dimmer = [
    '192.168.61.240', // dimmer controlled with button 0 
//    '192.168.61.241', // dimmer controlled with button 1 
//    '192.168.61.242', // dimmer controlled with button 2 
//    '192.168.61.243', // dimmer controlled with button 3
Script for controlling Ch.2
let dimmer = [
    '0.0.0.0', // dimmer controlled with button 0 
    '192.168.61.240', // dimmer controlled with button 1 
//    '192.168.61.242', // dimmer controlled with button 2 
//    '192.168.61.243', // dimmer controlled with button 3

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.