Product description: Shelly i4 Gen3 - 4-channel WiFi scene controller
Shelly i4 Gen3 is an advanced, four-channel input controller , ideal for managing scenes in a smart home. It can activate various devices and scenes , giving you full control over lighting , blinds, household appliances and other home automation elements. Powered by voltage from 110 V to 240 V AC , it offers full compatibility with popular systems such as MQTT, Webhooks, or KNXnet / IP . The built-in ESP-Shelly-C38F processor with 8 MB Flash memory ensures smooth operation and fast data processing. The controller can handle up to 16 actions and offers integration with the Shelly Smart Control application and Amazon Alexa and Google Assistant platforms. Thanks to the support of Bluetooth and WiFi communication, Shelly i4 Gen3 is easy to configure and does not require additional gateways to operate.
Shelly i4 Gen3 - 4-channel WiFi scene controller.
Controller allowing you to activate or deactivate created scenes.
Key Features of Shelly i4 Gen3
- Equipped with WiFi and Bluetooth connectivity
- It has 4 inputs
- Supports wide voltage range from 110V to 240V AC
- Offers support for MQTT, Webhooks, HTTP, TLS, UDP, KNXnet/IP protocols
- It can handle up to 16 different activities
- Allows easy setup without the need for an additional hub
- It has a new ESP-Shelly-C38F processor and 8 MB Flash memory
- Provides the ability to create custom scripts
- Small size allows for installation behind any wall switch
Gen3 - the new generation
The Shelly i4 is a model from the new Gen3 series, introducing a range of improvements over previous versions. The controller is equipped with a more powerful processor, ensuring faster and more reliable operation, even under heavy use. Additionally, the increased Flash memory (8 MB) allows for handling more complex automation scenarios and integration with future software updates. Thanks to these enhancements, the Shelly i4 Gen3 is even more responsive, stable, and ready to work in advanced Smart Home systems.
Its small dimensions mean it fits behind a wall switch.
Shelly i4 Gen3 can be powered from 110V to 240V AC.
Controller Applications
Shelly i4 Gen3 is the ideal solution for managing devices in your home, office or commercial building. Thanks to its four inputs, it allows you to activate different scenarios, such as turning on/off lights, closing blinds, starting electrical devices or activating security scenes . It can be mounted behind regular switches, making it a convenient tool for upgrading existing installations.
Shelly i4 Gen3 Technical Specification
- Power supply: 110V to 240V AC
- Power consumption: < 1 W
- WiFi connection: 802.11 b/g/n, range up to 30 m indoors
- Bluetooth connection: 4.2, range up to 10 m indoors
- Processor: ESP-Shelly-C38F
- Memory: 8MB Flash Memory
- Wire cross-section range: 0.2 mm² to 2.5 mm² (24 AWG to 14 AWG)
- Wire insulation stripping length: 6 mm to 7 mm
- Cooperation with protocols: MQTT, Webhooks, HTTP, UDP, TLS
- Operating temperature: -20°C to 40°C
- Operating humidity: 30% RH to 70% RH
- Housing material: plastic
- Dimensions: 37 x 42 x 16 mm
- Weight: 19 g
Shelly i4 Gen3 supports mjS scripting, allowing you to create custom functions.
| Comparison of Shelly Gen1, Gen2, Gen3 and Gen4 Devices | ||||
|---|---|---|---|---|
| Feature | Shelly Gen 1 | Shelly Gen 2 (Plus/Pro, Mini) | Shelly Gen 3 | Shelly Gen 4 |
| WiFi | 2.4 GHz WiFi | 2.4 GHz WiFi | 2.4 GHz WiFi | 2.4 GHz WiFi (WiFi 6) |
| Processing Power | Basic | More powerful processors than Gen 1 | Shelly chip for optimal performance | Most advanced processing power |
| Memory | Basic memory | Up to 4 MB Flash (8 MB in PRO) | 8 MB Flash, 256 kB RAM | More than Gen 3 (512 kB RAM) |
| Bluetooth | No | Yes - for easy setup | Yes - for easy setup | Yes - for easy setup |
| Scripting and Automation | No | Enhanced automation capabilities | Advanced scripting and automation | Advanced scripting and automation |
| Energy Monitoring | Basic (selected models) | Extended monitoring (some models) | Advanced monitoring and safety | Advanced monitoring and safety |
| Device Control | MQTT, CoAP, HTTP Webhooks | MQTTS, HTTP/HTTPS Webhooks, MQTT + Cloud | MQTTS, HTTP/HTTPS Webhooks, MQTT + Cloud | MQTTS, HTTP/HTTPS Webhooks, MQTT + Cloud |
| Virtual Components | No | Available (PRO only) | Supported | Supported |
| KNX Support | No | Yes (selected PRO only) | Yes (selected devices) | Yes (selected devices) |
| Bluetooth Gateway | No | Yes (except BLU TRV, Gen 3 gateway required) | Yes (except BLU TRV, Gen 3 gateway required) | Yes (except BLU TRV, Gen 3 gateway required) |
| KVS (Key-Value Store) | No | Yes | Yes | Yes |
| Timer Loop | No | Auto ON/OFF simultaneously | Auto ON/OFF simultaneously | Auto ON/OFF simultaneously |
| Range Extender | No | Yes | Yes | Yes (WiFi and ZigBee) |
| Simultaneous AP and WiFi | No | Yes | Yes | Yes |
| Ethernet | No | Yes (PRO only) | Yes (PRO only) | Yes (PRO only) |
| Intended Use | Basic home automation | More features, scripting, better hardware | Advanced automation, future-proof | Full automation, maximum flexibility |
| Protocol Support | None | BTHome, MQTT+Cloud, KNX (PRO) | BTHome, KNXnet/IP, Matter, MQTT+Cloud, Virtual Components | BTHome, Matter, ZigBee, TCP/IP Modbus, KNXnet/IP, MQTT+Cloud |
Useful links |
