Verified compatibility
We test every device for these ecosystems. For non-standard integrations contact us before ordering.
- Home Assistant
- Zigbee
- Matter
- KNX
- Wi-Fi
Compatibility
Works with these ecosystems
Protocols
- Wi-Fi
- BLE
Ecosystems
- Home Assistant
- Google Home
- Amazon Alexa
What it is, who it's for, what it does
About this product
Shelly Plus i4 DC turns ordinary buttons and switches into triggers for smart-home scenes. The device has 4 digital inputs (SW1-SW4) on screw terminals, designed for dry potential-free contacts powered on low voltage between 5 and 24 V DC. Each input can generate separate actions on short push, long push and double push.<br><br>It communicates over 2.4 GHz Wi-Fi and Bluetooth 4.2 with no extra hub: you connect it straight to your router and control it from the Shelly Cloud app or the local web interface. MQTT, REST/RPC API and scripting are supported, so it can command other Shelly devices, sensors or HTTP equipment. The 37x42x16 mm body fits behind most switch frames.
- DeliveryFree from 1500 MDL
- Returns30 days to return
- Warranty24 months
15+projects delivered300+devices installed3 yearslocal-first experienceChișinăushowroom Columna 153Book a showroom visit →
CasaSmart essentials
What it works with, what it needs, what you can do
Install & requirements
What you need on your side and what we deliver.
- Zigbee hub or Matter gateway for wireless variants
- 65 mm back-box or DIN panel for wired variants
- Local setup on Home Assistant — included in install
Smart scenarios
Three typical automations we set up after the install.
- 01Morning: warm light + blinds up + climate at 22 °C
- 02Leaving: lights off, arm sensors, close the gas
- 03Evening: warm ambient + cinema scene
Where it works
Use cases
A short push turns lights on, a long push starts the evening scene.
4 low-voltage buttons trigger lighting and blind scenes in the living room.
A button at the entrance turns off all house lights when leaving.
The i4 DC sends commands to Shelly relays in other rooms over Wi-Fi.
Opening the gate turns on the outdoor light and sends a notification.
A 12 V DC dry contact from a gate drive becomes a smart trigger.
Analytics
See consumption — save on bills
Real-time consumption tracking via the eWeLink app. Daily, weekly and monthly history helps identify the most energy-hungry devices.
For the installerTechnical specificationsfull spec · wiring · datasheet
For the installer
Technical specifications
full spec · wiring · datasheet
Connectivity
- Intrari
- 4 intrari switch/buton (SW1-SW4), contact uscat
Power
- Alimentare
- 5-24 V DC
- Consum
- <1 W
Wireless
- Wi-Fi
- 802.11 b/g/n 2.4 GHz
- Bluetooth
- 4.2
- Putere radio
- <20 dBm
Physical
- Dimensiuni
- 37x42x16 mm
- Greutate
- 17 g
- Sectiune conductor
- 0.5-1.5 mm2
Environment
- Temperatura de operare
- -20...40 C
Other
- Procesor
- ESP32-U4WDH, 4 MB flash
- Generatie
- Gen2 (model SNSN-0D24X)
Support
Frequently asked questions
How many inputs does the Shelly Plus i4 DC have?
It has 4 digital switch/button inputs (SW1-SW4) on screw terminals, designed for dry potential-free contacts.What voltage does it run on?
Low voltage between 5 and 24 V DC with consumption under 1 W; it is not connected to 230 V.Does it need a hub?
No. It connects straight to a 2.4 GHz Wi-Fi router and is controlled from the Shelly Cloud app or the local web interface.Does it switch lights or motors directly?
No. The i4 DC is only an input module that triggers actions; loads remain controlled by separate Shelly relays.Does it support Zigbee or Matter?
No. It is a Gen2 device with Wi-Fi and Bluetooth 4.2; it has neither Zigbee nor Matter.Which smart-home systems is it compatible with?
With Home Assistant, Google Home and Amazon Alexa, plus MQTT and REST/RPC API for custom integrations.
Same ecosystem
Works together
Devices that run in the same smart-home ecosystem.
Shelly
Shelly Wave Pro Dimmer 2PM Z-Wave 2-Channel DIN Dimmer Metering
—
Shelly
Shelly Wave Pro Dimmer 1PM Z-Wave DIN-rail dimmer with metering
—
Shelly
Shelly Wave PRO 3 LR – Z-Wave DIN 3-channel relay 16A
—
Shelly
Shelly Wave Pro Shutter - Z-Wave DIN-rail roller shutter and blind controller
—
Shelly
Shelly Wave PRO 2PM Z-Wave 2-channel DIN-rail relay with metering
—
Shelly
Shelly Wave Pro 2 - Z-Wave 2-channel DIN-rail relay
—
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Manager guidance
Questions about this product?
A CasaSmart manager calls you within 1–2 working hours and answers anything — compatibility, install, alternatives.
+373 60 944 922Updated: · reviewed by CasaSmart Expert Team