Shelly BLU Gateway Gen3 – Gateway, Bluetooth, Wi-Fi, white (S3GW-1DBT001)

The Shelly BLU Gateway Gen3 is a USB-A-powered Bluetooth-to-Wi-Fi gateway designed to provide network access and control for Shelly BLU devices, primarily Shelly BLU TRV thermostatic radiator valves. It communicates with BLU devices over Bluetooth LE and connects to the local network, Shelly Smart Control system and external automation platforms through 2.4 GHz Wi-Fi.

Up to 5 Shelly BLU TRVs can be paired with one gateway. The TRVs can be monitored and controlled locally and through the cloud, while the gateway also supports scripting, schedules, webhooks and MQTT communication. A Shelly BLU H&T temperature sensor and Shelly BLU Door/Window sensor can also be associated with a BLU TRV as auxiliary sensors.

The gateway features a built-in web interface, Shelly RPC API and Wi-Fi Range Extender functionality. In Home Assistant, it can be used through the Shelly integration and also makes paired BLU TRVs available. The manufacturer also supports integration with Amazon Alexa, Google Home and Samsung SmartThings.

About Shelly

Shelly manufactures smart home devices, in-wall and DIN rail-mounted relay modules, energy meters, dimmers, smart plugs, sensors, wall controllers and other building automation devices.

Depending on the model, Shelly products use Wi-Fi, Bluetooth, Zigbee, Matter and Z-Wave communication. In addition to the Shelly Smart Control system, many devices can also be integrated with Home Assistant, MQTT, KNXnet/IP and other local or cloud-based systems.

Key product features

• BLU TRV control: Can be used to monitor and control Shelly BLU TRV thermostatic radiator valves.
• Bluetooth pairing: Simple pairing with compatible Bluetooth devices.
• Bluetooth-to-Wi-Fi gateway: Bridges Bluetooth communication from Shelly BLU devices to the local Wi-Fi network and Shelly system.
• Up to 5 BLU TRVs: A maximum of five Shelly BLU TRVs can be paired with one gateway.
• USB-A design: Powered directly from a USB-A port.
• Physical pairing button: BLU TRV pairing can be started using a dedicated button.
• LED status indication: A coloured LED indicates Wi-Fi connection, pairing and firmware update status.

Smart home protocols and platform compatibility

• Bluetooth LE: BLE 4.2 connection for compatible Shelly BLU devices.
• Wi-Fi: 2.4 GHz IEEE 802.11 b/g/n connection to the local network.
• Shelly Smart Control: Supports local and cloud-based monitoring and control of paired BLU TRVs.
• Home Assistant: The Shelly integration supports the gateway, and Shelly BLU TRVs can also be integrated into Home Assistant through it.
• MQTT: Native MQTT support for external automation systems.
• Shelly RPC API: A documented Shelly API is available for local system integration.
• Amazon Alexa: Manufacturer-supported integration.
• Google Home: Manufacturer-supported integration.
• Samsung SmartThings: Manufacturer-supported integration.

Smart features

• BLU TRV monitoring: Target temperature, current temperature, valve position, battery status and connection status can be managed through the gateway.
• BLU TRV control: Settings and operation of paired thermostatic radiator valves can also be changed remotely.
• External temperature sensor: One Shelly BLU H&T can be associated with a BLU TRV as an external temperature source.
• Door/window sensors: Shelly BLU Door/Window sensors can be associated with a BLU TRV to monitor window or door status.
• Scripts: Up to 10 scripts can be run for custom automation logic.
• Schedules: Up to 20 schedules can be configured.
• Webhooks: Up to 20 webhooks can be configured, with a maximum of 5 URLs per webhook.
• Local and cloud operation: BLU TRVs can be managed over the local network and through Shelly Cloud.
• Web interface: A built-in local web interface is available for monitoring and configuring the gateway.
• Wi-Fi Range Extender: The device also provides Wi-Fi range extender functionality.
• OTA update: Gateway firmware can be updated over the network, and firmware updates for paired BLU TRVs are also supported.

Power supply and operation

• Power supply: 5 V DC from a USB-A port.
• Power consumption: Below 1 W, with short-term peak consumption of up to 5 W.
• USB-A design: Can be connected directly to a USB power adapter, computer or other suitable USB-A power source.

Technical specifications

• Product name: Shelly BLU Gateway Gen3
• Model: S3GW-1DBT001
• Function: Bluetooth-to-Wi-Fi gateway
• Processor: Shelly ESP32-C3
• Flash memory: 8 MB
• Wi-Fi: IEEE 802.11 b/g/n
• Wi-Fi frequency: 2401–2483 MHz
• Wi-Fi transmit power: <20 dBm
• Wi-Fi range: Up to 30 m indoors and 50 m outdoors, depending on environmental conditions
• Bluetooth: BLE 4.2
• Bluetooth frequency: 2402–2480 MHz
• Bluetooth transmit power: <10 dBm
• Bluetooth range: Up to 10 m indoors and 30 m outdoors, depending on environmental conditions
• Power supply: 5 V DC, USB-A
• Power consumption: <1 W, up to 5 W peak
• Dimensions: 60 × 27 × 11 mm
• Housing: Plastic
• Colour: White
• Operating temperature: -20–40 °C
• Storage temperature: -20–40 °C
• Operating humidity: 30–70% RH
• Maximum operating altitude: 2000 m
• Schedules: 20
• Webhooks: 20, up to 5 URLs per webhook
• Scripting: Supported
• MQTT: Supported
• Encryption: Supported

Additional features

• BLU TRV capacity: Up to 5 Shelly BLU TRVs can be associated with one gateway.
• BLU H&T compatibility: Up to one Shelly BLU H&T temperature sensor can be associated with a BLU TRV.
• BLU Door/Window compatibility: Shelly BLU Door/Window sensors can be associated with a BLU TRV.
• Pairing button: A short press starts BLU TRV pairing.
• Reset button: Holding for 5 seconds activates AP mode and Bluetooth connectivity, while holding for 10 seconds performs a factory reset.