Before you buy the Sonoff (Itead) DW2RF, check what's inside.

The Sonoff DW2RF is a battery-powered wireless door/window sensor that communicates via RF 433MHz, not WiFi. It is designed to work with Sonoff RF bridges and the eWeLink app for remote notifications when a door or window is opened or closed.

⚠️ NOTE: Ensure correct battery polarity when replacing the CR2450 battery.

Quick Specs

• Manufacturer: Sonoff (Itead)
• Model: DW2RF
• Protocol: RF 433MHz
• Chipset: ESP/CK Chip
• Ecosystem: Sonoff
• App: eWeLink

🔧 Geek Corner (Flashing Info)

• Chipset: ESP8266
• Flashable: ❌ No
• Info: The DW2RF is an RF-only sensor and does not contain a microcontroller that can be flashed with custom firmware like Tasmota. It relies on a proprietary RF protocol.

User Manual

Scanned pages from the official user manual:

External Photos

Photos of the device exterior:

Internal Photos

Teardown photos showing the PCB and components:

Verdict

The DW2RF is a WiFi device from the Sonoff ecosystem.