Devices FAQ
Frequently asked questions for Shelly Devices.
Frequently Asked Questions
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At what circumstances I need to use Shelly bypass?
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Calibration on Shelly 2.5 is not working. Where is the problem?
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Can I change the status period update?
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Can I control the New-Generation devices through Bluetooth?
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Can I extend the cables from Shelly Add-On / CT transformers?
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Can i measure a DC load ?
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Can I measure the moisture with some Shelly product?
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Can I monitor a solar panel?
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Can I monitor the Open/Close status when controlling the garage door?
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Can I send HTTP commands to a Shelly device itself?
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Can I send HTTPS commands with New Generation devices?
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Can I send HTTPS commands with Old generation devices?
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Can I use 50A clamp for Shelly 3EM?
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Can I use a dimming-knob as “SW” input to Shelly devices?
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Can I use another brand CTs for Shelly EM/3EM?
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Can I use any Shelly device to control my ceiling fan? I want to turn it on/off and control the speed.
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Can I use different phase/voltage on L1-L4 or S1-S4 on Shelly Pro 4PM?
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Can I use Plus devices with LAN cable?
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Can I use Pro devices with LAN cable?
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Can I use rechargable batteries 3.7V CR123A for Shelly H&T/Shelly Flood/ Shelly DoorWindow 2
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Can I use Shelly 1 as a transformer?
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Can I use Shelly 1 with 20A load?
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Can i use Shelly 3EM for network voltage monitoring? Is it possible to view the voltage graph for the past 24 hours?
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Can I use Shelly 3EM without neutral?
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Can I use Shelly devices with Zigbee hub ?
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Can I use Shelly Dimmer 2 with Shelly Button accessory?
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Can I use Shelly Pro device for access point?
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Can I use Shelly relays without a neutral cable connected?
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Can I use Shelly sensors outside?
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Can I use Shelly Wall switch without a smart relay?
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Can the Shelly UNI output voltage in range 0-12V?
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Can you advise the functions of Shelly devices with Bluetooth? Can it create meshed BLE network?
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Does New Generation devices support MQTTS?
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Does Old Generation devices support MQTTs ?
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Does Old Generation devices support scripting?
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For what I can use the output of Shelly EM/3EM?
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For which products I can use the RC snubber?
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For which Shelly devices can I use Shelly Bypass?
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How can I compare Shelly devices?
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How long do the batteries last in Shelly products that use them?
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How many Shelly devices can I put on one Wi-Fi network?
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How many temperature sensors can I connect to AddOn for Shelly 1/1PM?
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How Shelly battery-powered devices work?
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How to check the IP address of the Shelly device if it's listed as OFFLINE?
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How to connect 120A transformer to Shelly EM?
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How to use Shelly devices without internet?
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I am not able to connect to Shelly network. What should I do?
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I cannot add Shelly device to the cloud. Error "Device owned by another user" is registered. What should I do?
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I got Shelly UL version - I see on device's label it can be powered by 30-50V but on documentation is stated 24-60V. What is the correct value?
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I have a sprinkler system. What device is required for automating it?
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I have a wind sensor attached to the roller shutter. Would it work with Shelly 2.5, Shelly Plus 2?
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I have an Air Conditioner. Can I use some of the Shelly relays to turn on/off them remotely?
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I have purchased Shelly RGBW2 and have noticed an extra item in the packaging. It has a central circuit board covered in heat shrink. What is the purpose for it?
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I have worries that my devices are getting to high temperatures. What can I do?
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I ordered Shelly EM with 120A CT, and it has a plastic connector at the end. How to connect them?
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I see wrong measurement from Shelly EM/3EM. What should I do?
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I want to control a load above 16A and monitor his consumption. What device should I use?
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I would like to control and monitor my boiler, which is usually 16A. Which Shelly device do I heed?
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If I have a Shelly 1 with an Add-On used for a door sensor (external switch enabled), can I add a temperature sensor on the same add-on?
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In which situations I need the RC snubber?
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Is it possible to control 2 devices together, when there is no physical connection between them?
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Is it possible to control devices with HTTP commands when temporary there is no internet access?
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Is it possible to use external power supply for Shelly H&T?
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Is it possible to use the temperature Add-On from Old generation devices to the NG devices ?
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Is it safe to use Shelly H&T/Plus H&T with batteries and USB power at the same?
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My devices are turning on at a specific time. What should I do to stop this?
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My Shelly relay is restarting when switching on inductive load - such as fans, motors, roller. What should I do?
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What can I use the temperature Add-On for?
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What devices are part of New Generation?
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What does "dry contacts" mean on the Shelly 1?
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What is the difference between Plus and Pro devices?
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What is the difference between Shelly 1 and Shelly 1PM?
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What is the difference between Shelly 1 and Shelly 2.5?
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What is the difference between Shelly Plug and Shelly Plug S?
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What is the output of the Shelly RGBW2?
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What is the power consumption of the Shelly devices themselves?
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What is the reason my Shelly devices are going in factory reset mode without my intention?
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What is UL certification and what is the difference between UL and non-UL device?
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What power Shelly devices need?
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What product do I need for garage/gate doors ?
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What will happen if my internet drops? Will my Shelly EM/3EM continue to report the energy?
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What's the difference between Gen. 1 and Gen. 2 devices?
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Where i can see more script examples?
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Which device I can use for monitoring voltage?
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Which device measures amperage?
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Which devices supports scripting ?
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Which Shelly products allow dimming?
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Which Shelly products measure power?
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Why I cannot press the button on Shelly i4/i3 at the app ?
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Why is the Shelly 1 called 'Open Source'?
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Why my Shelly PLUS H&T shows different temperatures on the display and from the app?
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Why my Smart bulbs are not switching ON with configured "Night mode" after turning them ON via switch?