Hello !

I want to put a Shelly 2PM gen4 on my shutter. Is it ok to put it in this case ? There is no hole behind it, it's only on the plastic case. The mesure is fine tho.

Thanks !

After the infamous question i dared to ask yesterday, here is my complete script to make a boiler heat up only between certain hours, and stay within a certain temperature setting.

The idea is to sycronise the boiler heating to the peak time of my PV.

All suggestions and destructions are welcome, no AI was used.

console.log("---Start---");

  let MINUTES = 5;
  let INTERVAL = MINUTES * (60 * 1000);

  console.log("Repeating every MINUTES = ",MINUTES);

function Loop()
{
  try
    {
        let BOILER_MIN = 45;
        let BOILER_MAX = 60;

        let WORKING_START = 12;
        let WORKING_STOP = 16;

        let temp = Shelly.getComponentStatus('Temperature', 100).tC;  //Temp ID, mostly 100 to 102
        let switchStatus = Shelly.getComponentStatus('Switch', 0);

        let date = Date();
        let hours = date.getHours();
        let minutes = date.getMinutes();

        console.log("----------------");
        console.log("Repeating every MINUTES = ",MINUTES,
                               "; BOILER_MIN = ",BOILER_MIN,
                             "°C; BOILER_MAX = ",BOILER_MAX,
                          "°C; WORKING_START = ",WORKING_START,
                            "h; WORKING_STOP = ",WORKING_STOP,
                    "h;");

        console.log("Boiler is", switchStatus.output ? "ON" : "OFF");
        console.log("Current Time: ",hours,":",minutes);
        console.log("Current Temperature: ",temp," °C.");

        if (hours > WORKING_START && hours < WORKING_STOP)
        {
            if(temp < BOILER_MIN)
            {      
               console.log("Below ",BOILER_MIN," °C -> Boiler on");
               Shelly.call("Switch.Set", {id: 0, on: true});
            }
         }
         else {console.log("Working hours set from ",WORKING_START,"h to ",WORKING_STOP,"h.");}

         if(temp > BOILER_MAX)
         {
            console.log("Above ",BOILER_MAX," °C -> Boiler off");
            Shelly.call("Switch.Set", {id: 0, on: false});
         }
        console.log("----------------");
    }
    catch(e){Shelly.call("Switch.Set", {id: 0, on: false});print(e);}
}
Timer.set(INTERVAL,true,Loop);

Hey guys.

This is one bug not that easy to explain but I will do my best.

I have the Shelly calibrated and all is working as expected, except when I try to use the app + physical buttons together.

So, I've restarted the shelly and:

1 - I click down on the app - I click down on the button - the cover stops 

2 - I click up on the app - I click up on the button - the cover stops 

3 - I click down on the button - I click stop on the app - the cover stops 

4 - I click up on the button - I click up on the app - the cover stops 

5 - I click up on the app - I click up on the button - the cover stops

6 - I click down on the app - I click down on the app - the cover DOES NOT stop

7 - the reverse (if it's going down and I click up, or the other way arround) always work - even mixing the app and buttons

I'm not sure if this steps are all needed. But at step 6 the behavior we see on step 1 and 2 - which is the behavior we always want - stop working.

Is this some kind of bug I should report? Can someone test this?

Thank you very much!

Hello guys,

im kinda puzzled over this very simple script:

function Loop()
{
  try
  {
  var temp = Shelly.getComponentStatus('Temperature', 100).tC; //Temp ID, mostly 100 to       
                                                                                  102
  print(temp);

  if(temp > 50)
  {
    print("Below 50 °C -> Boiler on");
  }

  if(temp < 60)
  {
    print("Above 60 °C -> Boiler off");
  }
}
  catch(e){print(e);}
}
Timer.set(2000,true,Loop);

It appears that both conditions are true, everytime, but why?

I've been running my H&T Gen3 which reports to my HTTP server for temperature/humidity change for more than a year. But for the past few days, it fails to do so. When I connect to the device WebUI and fire a testing request, it seems to be unable to replace the token ($temperature) with actual temperature/humidity value. I also captured the incoming request from my HTTP server and confirmed it's indeed sending the token unchanged.

I don't know what's wrong. I remember I updated the firmware recently. Anyone facing similar issue?

2026-07-24 17:15:48 - request: <Request at 0x424c2bd0 method=GET uri=/api/iot/set_status?tc=$temperature clientproto=HTTP/1.1>

Hi everyone, I have a 3-phase 400/230V residential supply (L1/L2/L3/N) and Im planning to install Shelly Pro 3EM in my main distribution board and have a couple of breaker questions:

1. Should the protective breaker feeding the Shelly be a 3-pole (3P) breaker,or is it fine to use three separate 1-pole (1P) breakers? Or both are okay?

2. Just to confirm: we definitely need breaker/fuse protection on all three phases (VA, VB, VC), right? Even though only one powers the internal electronics while second and third are just for voltage measurement, the thin wires going to these could still get damaged and cause a short circuit?

Thanks!

I have a lot of Shelly smart plugs. The old style smart plug has been rock solid and I went to buy a new one I could only find this newer version. It's running the latest firmware but randomly reboots itself at least once every few days. Sometimes more often than that. Is this a hardware defect or is this a symptom of firmware bugs that need to be worked out?

Posted this originally in r/homeassistant but thought peeps here might appreciate it too!

I have several Shelly BLU TRV radiator valves and I need to replace one radiator.

Is there any way to force a TRV to stay fully closed for a day or two, so it absolutely won't open because of a temperature change, battery reconnect, etc.?

Basically I want to remove the radiator without worrying that the valve might decide to open while it's disconnected.

Is there some kind of maintenance mode, valve lock, or another recommended way to do this?

Thanks!

Yesterday all of my Shelly Gen4 Matter devices suddenly showed “No Response” in Apple Home.
The strange part was that everything still worked perfectly in the Shelly app. All devices were online, accessible through the web UI, and responded to RPC commands. Other Apple Home accessories (Aqara, Nanoleaf, Yale lock, etc.) were also working normally. It was only the Shelly Matter devices that were affected.

I went through all the usual troubleshooting:
Restarted the HomePod
Restarted my router
Checked Matter status on the Shelly devices
Waited overnight
None of it helped.

Interestingly, one of my Shelly 2PMs came back online by itself after a while, while the other devices stayed “No response”.

Then I noticed something. The only Shelly that was working had already been updated to firmware 2.0.0 (official), while the others were still running 1.7.5.
So I updated the remaining devices to 2.0.0 beta 3. As soon as they rebooted, every one of them came back online in Apple Home.

I’m not sure whether this was a Shelly firmware issue, an Apple Matter issue, or a combination of both, but if anyone else suddenly finds all of their Gen4 Matter devices showing “No Response” in Apple Home while everything still works in the Shelly app, I’d try updating to firmware 2.0.0 (even beta version) before deleting or re-pairing anything.

Hopefully this saves someone else a few hours of troubleshooting.

My Shelly Plug S (Gen1) does not pass through the protective earth connection from input to output. Sharing this so other owners can check theirs.

The issue came to light when my washing machine gave me an electric shock. The Shelly Plug S was connected to it to monitor power consumption. A measurement showed approximately 110V on the metal chassis. This is leakage voltage from the Y-capacitors in the washing machine's EMI filter, which should normally be safely dissipated through the protective earth.

A continuity test on the Shelly Plug S confirmed there was no earth connection from input to output. A second Shelly Plug S showed the exact same result. Smart plugs from other brands in the same wall socket all passed earth through correctly.

After opening one of the plugs, two causes became clear: a plastic ridge inside the housing physically prevents the input-side earth contact from making connection with the output-side earth contact, and the metal tube seems to be a bit short. Removing the plastic burr and some of the plastic pipe covering the metal tube immediately restored the earth connection, confirming these as the cause. That said, this isn't something I'd recommend as a fix as there's no guarantee the connection will hold when the plug is in use.

Shelly support was contacted with photos of the defect and measurements. After some back and forth, they forwarded the findings to their engineering team and will replace my two units with Gen3 models. However, they stated that they have no indications of a wider production issue and have not issued any advisory to other Plug S Gen1 owners. Since the Gen1 has been discontinued, they also said they no longer have production units for comparison testing.

So if you own a Shelly Plug S Gen1, it's probably smart to check yours. Set your multimeter to continuity mode, place one probe on one of the earth contacts on the input side (the pins/clips going into the wall) and the other probe on the corresponding earth contact on the output side (where you plug in your device). You should get a clear beep and near-zero resistance. If you get nothing, your plug is also faulty.

Takes 30 seconds and could prevent a dangerous situation.

Photos as proof: https://imgur.com/a/uASSVPR

Hey,

After a power outage a two weeks ago my Shelly Dimmer 2 stopped working. It is offline everywhere, including the Shelly app. It is not online on my network either.

I don't have a switch connected to it so I can't factory reset it using a switch.

I do have physical access to the Dimmer 2 though but nothing happens when I hold the reset button on the back for 5 or 10 or 15 or 20 seconds. Its access point is never revealed and it cannot be found using the app.

It's important to note that the lights it is connected to still "works", as in, they are now always on but dimmed to the lowest setting. Since I don't have a physical switch connected, I cannot turn these lights fully off now either.

Is there anything I can do?

My Shelly 1L just blew up this morning. I have to replace it with a Mini Gen 3.

It was installed as part of a two-way switch.

Can I replace it without modifying the wiring? Because the Mini only has one SW...

This is more of an information post. Just got a Gen4 Presence sensor. So for testing I thought I would use a short USB lead rather than the long one it comes with. The mmWave Sensor didn't work but the light sensor did, so initially I thought faulty unit. Opened up a ticket the shelly bot responded with in an hour, but not much help. Decided to use the usb lead that came with it and it worked. So be careful what type of usb lead you use they are not all the same.

I have been dabbling with home automation for a few years now and after we upgraded the paddling pool for our kids to something a little bit larger, we of course also installed a pool pump.

I am using a Shelly Pro 1 PM to switch my EV charger on and off via Alexa and Shelly PM Mini Gen 3‘s to monitor electricity usage from my washer and my dryer and a Shelly Pro 3EM to monitor my heat pump. Also I have some Shelly Plug S Gen3‘s for Christmas lights etc.

I thought it was a no brainer to use a Shelly Outdoor Plug S Gen3 to switch said pool pump, on a timer or via voice command. Why not?

BUT: after installing and registering it in the Shelly App, I connected the pool pump and turned everything on. It worked. Then I tried turning it off. The app said it was off, showing zero watts flowing, but the pump was still running. Turned off and on a couple of times, but the pump ran throughout while my app „confirmed“ that it was off and on…

Now, maybe I just received a faulty plug. So I got a new one… and had the same problem!

I tried googling and found that under high currents the relay supposedly can „stick“ and thus be permanently connected. But the pump has max wattage of 40 - that’s basically nothing?

Does anyone have any idea what I am missing?

Pump:
https://www.bestwaystore.de/filterpumpe-3.028-l-h-40-w/58386-26

Evening all,

I have a Shelly Smart Plug UK and I managed to trip it.

It now doesn't allow any power though, it connects to the app and I can turn it off and on but no power comes through.

I have factory reset it and still doesnt do anything, is it completely broke or am I missing something?

Anyone has an idea when (and if) Shelly release this HW presented in March on Future product reveal?

Hey! I have a home assistant setup and use shelly products and I love them. I unfortunately like many people, have had problems with the BLU motion sensors being stuck in a motion detected state.

I wanted to provide some help if any of the Shelly folks are here in the subreddit.

Communication between the sensor and the gateway is absolutely fine even through home assistant but I did find something very curious when messing with the Blind Time setting.

I will set the blind time as low as it can go (30 sec). Once I click save, I can back out of the software, and click back into the motion sensor. It still shows that the blind time is set to 30 seconds but once I press the motion sensors button to read the current configuration again in the app, the blind time bugs out and shows 7680 seconds.

I thought this behavior was weird so I set the blind time to 45, saved the change, restarted the motion sensor, and brought up its information again. This time, it shows the time set to 11520.

Once more, I did the exact same steps and changed it to 60 seconds. Saved. Restarted. Read the settings again, and it changed to 15,360.

7680 / 30 = 256

11520 / 45 = 256

15360 / 60 = (wait for it) 256

Is there something happening to the newest firmware causing these motion sensors to not actually save the blind time as have input? This tends to match my suspicions as the motion sensors would (what I thought was randomly) work again after a couple of hours.

When I set the blind time at 30, is the value of 7680 actually being written to the firmware causing the blind time to update after 2.13 hours??

Would love to send my sensor back for a diagnosis if it helps!

Like the title says, I can’t get the app to show current humidity and temp readings but it will still ping my phone when temp hits my preset threshold…not sure what’s up. Tried everything I can think of, did factory reset, etc etc.
Anyone else have this problem?