SONOFF Hydro Series Hydro ONE smart irrigation valve with flow meter, Zigbee (SWV-ZFE)

The Hydro ONE Zigbee smart water valve is SONOFF’s battery-powered smart irrigation valve designed for outdoor use. It allows you to perform scheduled and automated watering tasks in gardens, lawns, vegetable plots, or smaller irrigation zones. Thanks to the built-in water flow meter, it supports not only time-based but also fixed-volume irrigation, enabling more precise control over water usage. It is especially useful for users who want consistent and predictable watering while reducing waste and minimizing manual intervention, or simply do not have time for daily irrigation tasks.

One of the device’s key advantages is that it supports both Zigbee 3.0 and nearby Bluetooth Low Energy connectivity for situations such as internet outages or weak Zigbee signals. In Zigbee mode, when connected to a hub, it offers rich automation features. In proximity mode within the eWeLink ecosystem, it can be controlled directly from a smartphone within a 10–20 meter range without a gateway. This is particularly useful in outdoor areas where Zigbee signal strength is limited or when you prefer to use the valve without a hub for basic functionality.

The Hydro ONE supports intelligent scheduling, weather-based irrigation, seasonal adjustments, leak and water shortage alerts, and frost warnings to ensure reliable operation. The brass connector provides a durable and secure installation, while the IP55 rating makes it suitable for outdoor use. This product is recommended for users looking for a modern yet easy-to-install irrigation control solution, with the added benefit of water consumption monitoring.

About the SONOFF Brand

SONOFF is one of the most well-known smart home brands offering excellent value for money, with a product portfolio including Wi-Fi, Zigbee, and increasingly Matter-compatible devices. Its range includes smart relays, switches, sensors, cameras, smart plugs, and garden automation solutions. SONOFF devices are typically built around the eWeLink platform but are also compatible with systems such as Alexa, Google Home, SmartThings, and Home Assistant.

Main Product Features

• Dual connectivity: Supports Zigbee 3.0 and Bluetooth Low Energy proximity control, enabling both hub-based and direct local operation.
• Built-in water flow meter: Enables irrigation based on both time and precise water volume.
• 6 smart schedules: Up to 6 independent watering programs (time-based or volume-based).
• Weather-based adjustment: Automatically skips watering during unfavorable weather conditions.
• Seasonal adjustment: Watering duration and volume can be adjusted according to the season.
• Real-time alerts: Notifications for low battery, water shortage, leaks, and frost risk.
• Brass connector: Durable, stable, and reduces the risk of cracks or leaks.
• History and downloadable statistics: Track daily, monthly, and semi-annual watering time and water usage.

Smart Home Protocols and Platform Compatibility

• Protocols: Zigbee 3.0 and Bluetooth Low Energy
• Multi-protocol operation: Supports Zigbee and proximity-based BLE connection
• Native platform: Primarily used with the eWeLink app
• Hub-free local control: In proximity mode, controllable directly via smartphone without a gateway
• Cloud platforms: Supports Alexa, Google Home, SmartThings, and IFTTT via eWeLink integration
• Home Assistant compatibility: Supported in ZHA and Zigbee2MQTT environments (feature availability may vary)
• SONOFF Zigbee hub compatibility: Works with devices such as ZBBridge-P, ZBBridge-U, NSPanel Pro, iHost, Dongle Plus MG24, Dongle Lite MG21, Dongle Max, and ZBDongle-P/E
• Voice control: Available via Alexa and Google Home integration (via compatible hub)

Smart Features

• Remote control: Open/close the valve remotely via app.
• Manual watering: Start or stop watering instantly.
• Scheduled irrigation: Up to 6 configurable programs.
• Time-based or volume-based watering: Flexible configuration based on user needs.
• Rain delay: Skip upcoming watering cycles manually or automatically during rainy conditions.
• Weather-based automation: Automatically skips watering based on temperature, humidity, and rainfall conditions (Zigbee mode).
• Seasonal adjustment: Monthly multiplier to adjust watering duration or volume.
• Consumption history: View and download daily, monthly, and semi-annual data.
• Alerts: Push notifications for low battery, water shortage, leaks, and frost risk.
• Automations / scenes: Trigger actions based on valve state, water usage, irrigation duration, or battery level.
• Child lock: Disable the physical button while maintaining app control.
• Device sharing: Share control with family members via the app.
• Group control: Manage multiple irrigation valves together.

Technical Specifications

• Product name: SONOFF Hydro ONE
• Product family: Hydro Series
• Product type: Zigbee Smart Irrigation Valve
• Models: SWV-ZFU / SWV-ZFE
• MCU: TLSR8656
• Power supply: 6V DC (4 × 1.5V AA batteries)
• Connectivity: Zigbee 3.0 / BLE
• Protection rating: IP55
• Operating water pressure: 0.06–0.8 MPa
• Dimensions: 152 × 100 × 46 mm
• Color: Black
• Housing material: PC + ABS
• Operating temperature: 5–60 °C
• Allowed water temperature: 5–40 °C
• Operating humidity: 5%–95% RH, non-condensing
• Operating altitude: below 2000 m
• Certifications: SWV-ZFU: CE / RoHS / FCC / CP65; SWV-ZFE: CE / RoHS / FCC