The Shelly i4 GEN3 is a special product of the smart home manufacturer, launched in 2024, and is the successor to the Shelly Plus i4. The Shelly i4 GEN3 is proposed for installation behind conventional wall switches. It does not have a relay on the device, but can manage the status of up to 4 switches or other input/control devices, and based on that, can control other Shelly relays, sensors or other devices controlled by HTTP/HTTPS, MQTT or CoAP.
Essentially, it is designed to wirelessly "connect" a switch to devices connected to Shelly relays installed elsewhere in your home (or even elsewhere). Mounted behind the switch(es), the Shelly i4 Gen3 can detect changes in the state of the switches and send switching commands via WiFi to Shelly PLUS, PRO or Shelly GEN3 relays, controlling up to several in a group with one switch. It can therefore be used in pairs with a Shelly smart relay in cases where both the switch and the lamp have phase and neutral wiring available, but the two are far apart or just have missed wiring between them.
It is able to receive up to 4 physical (two-position or rocker) switch signals connected to it, and to link up to 4 events to each of them, giving a total of 16 commands. You can also assign different commands to the different switching modes in the Scene function, but you can also use DDD control between devices to call other devices from a URL and send commands to them. The Shelly i4 GEN3 can therefore also be used for scene control from a physical wall switch.
As with other Shelly devices, the i4 GEN3 does not require a hub or gateway to operate, it connects directly to the WiFi router.
For example, you can program a single wall switch to switch on/off devices in different ways (e.g. double press), such as switching lights, shutter control, etc., or even trigger control of multiple devices (even delayed relative to each other) using Shelly Cloud's "Scenes" feature.
For example, a single bedside switch can be programmed to turn off a bedroom light at the touch of a button, all the lights in the home at the touch of a double button, and shutters at the touch of three buttons. Or you can create a 'I'm out' button by the front door that turns off all Shelly-controlled lights, closes the blinds and turns off the iron socket.
You can also use it to monitor whether a circuit breaker is not tripped (and if there is current in the circuit) using a Shelly i4 GEN3 as an example, but also to monitor whether there is current in a particular controlled circuit, and set rules in the Shelly Cloud app for the state of the switches / current flowing/not flowing in the circuit, e.g. turn off/on other Shelly WiFi relays via WiFi wireless control.
DEVICE CASE:
The Shelly i4 GEN3 has the same dimensions as its predecessor, so the usual DIN adapters can be used for GEN3 relays. It also includes wiring diagrams for easy and clear wiring.
BLUETOOTH PAIRING:
Pairing requires the new Shelly Cloud app, not compatible with the old Shelly Cloud app. Pairing is done with the same speed as Shelly Plus i4 thanks to the built-in Bluetooth chip.
MORE POWERFUL PROCESSOR, MORE FEATURES:
The ESP32 processor in the Shelly Plus i4 has been replaced by the ESP-Shelly-C38F processor in GEN3 products, which features an even faster and more powerful CPU and double the 8MB of memory, offering enhanced features and faster operation than the PLUS product line.
The Shelly i4 GEN3 requires a constant 110-240V AC power supply to operate.
The four switch inputs expect the same voltage, and
- and detects whether the switch is on or off,
- or, if not used for a switch, it senses whether there is current in the circuit.
As with the Plus i4, the i4 GEN3 is also compatible with the new Shelly family of light switches with a four-button "scene control" switch, which can be easily configured to create commands to control other devices (either group or scene-based) in the Shelly system by simply clicking on the back of the switch.
(The four-button wall switch is not included with Shelly Plus i4, but is available as a separate product.)
Product features:
- Connects directly to the WiFi router, no hub or gateway required for operation
- Compatible with 110-240 АC supply voltage, the constant supply voltage and the supply voltage from the switches/circuits must be the same.
- Can manage up to 4 switch states and control up to 4 states of each, using the Shelly Could app's Scene function to control multiple devices
- Compatible with Shelly Cloud app for Android and iOS, Amazon Alexa, Google Assistant, and home automation systems using MQTT, CoAP, and REST API.
- Factory firmware can be easily replaced on demand
- Supports mjS scripts, allowing customers to create their own functions and features! Shelly GEN3 line devices allow multiple scripts to be executed together, depending on different triggers such as input/output status, sensor data or WLAN requests
- GEN3 Supports Virtual Components, so you can create additional functions and change these values or states from external systems using HTTP commands
- It can also perform Bluetooth gateway functionality, and GEN3 devices can even communicate with Shelly BLU sensors and remote controllers via local cloud connection, allowing islanding between GEN3 and BLU devices.
Supported modes:
- Cloud/Cloud mode: then connects to the free Shelly Cloud, which can be used to control and configure devices from the Shelly Cloud smartphone app (available for iOS and Android) and from https://my.shelly.cloud/
- choose LAN / local network trunk mode, in which case devices can only be controlled from devices connected to the local network; or
- operate the device (instead of WiFi client mode) in WiFi Access Point mode(e.g. if there is no fixed WiFi network at the installation site), in which case you can connect a mobile phone or notebook near the device directly to the WiFi AC network broadcast by the device and control the device during the connection.
Other supported platforms, integrations:
- MQTT
- HomeSeer
- ioBroker
- Home Assistant
- openHAB
- Domoticz
- SYMCAN
- nymea
- Hubitat
- REST API
Installability:
- Typically fits into standard size switch sockets behind the fittings.
- With DIN-rail adapter (separate product).
- Compatible with Shelly Plus Add-On.
Other technical parameters:
Power supply: 110-240V AC (±10%)
As with other smart relays, this one requires not only a phase conductor but also a neutral conductor.
