Sonoff CAM GlassView – Indoor window camera, 2K, Wi-Fi, white (CAM-S3W)

The SONOFF CAM GlassView CAM-S3W is a 3 MP, 2K Wi-Fi camera designed for mounting on window glass to monitor outdoor areas from indoors. The camera features a 100° field of view, an F1.0 aperture lens, 2.4/5 GHz Wi-Fi connectivity, AI-based person detection and two-way audio communication. Its design is specifically optimised for capturing images through glass.

The camera does not use infrared or white illumination LEDs because these would reflect from the window glass. At night, it relies on available ambient light, so it can still provide colour images when street lighting, garden lights or other external light sources are present, while image quality decreases in complete darkness. Reflection-reduction image processing helps minimise reflections caused by the glass and strong light sources.

In addition to eWeLink, the CAM-S3W can also be managed locally from a browser using the OpenEdge web interface. With RTSP and ONVIF support, it can be integrated with Home Assistant, NVR systems and other video surveillance platforms, while the JSON-RPC 2.0 API can be used through HTTP and WebSocket connections. Recordings can be stored on a microSD card with a capacity of up to 128 GB without requiring a cloud subscription.

About SONOFF

SONOFF manufactures smart home devices, relay modules, energy meters, wall switches, Zigbee sensors, control panels, gateways and security cameras. Its product range includes devices using Wi-Fi, Zigbee, Matter and LAN communication.

SONOFF devices are primarily based on the eWeLink platform, but many models can also be integrated with Home Assistant and other local or cloud-based systems. Some of the manufacturer's newer devices also support the OpenEdge local management interface and a documented local API.

Key product features

• Window-mounted design: Can be installed indoors while monitoring the outdoor area through a window.
• Drill-free installation: Mounts to the glass using 3M adhesive brackets. Three different brackets are included, including an adjustable-angle version.
• 3 MP / 2K image: 2K video resolution with a 100° field of view.
• Imaging through glass: Reflection-reduction image processing helps minimise reflections caused by the window glass.
• AI person detection: Supports motion and person detection with real-time notifications.
• Two-way audio: Uses a built-in microphone and speaker.
• Local management: The OpenEdge web interface can be used from a browser without a cloud connection.
• Local storage: Supports recording to a microSD card with a capacity of up to 128 GB.

Smart home protocols and platform compatibility

• Wi-Fi: IEEE 802.11 a/b/g/n connectivity on 2.4 and 5 GHz.
• eWeLink: Provides access to live view, events, alerts, recordings and camera settings.
• OpenEdge: Local web-based interface for live view, configuration and firmware updates.
• Home Assistant: Can be integrated through RTSP or ONVIF.
• RTSP / ONVIF: Can be used with local NVR systems, video management platforms and smart home systems.
• HTTP / WebSocket API: Supports local integration based on JSON-RPC 2.0.
• Amazon Alexa: Live view and two-way audio can be used on compatible Echo Show displays.
• Google Home: Live view and two-way audio can be used on compatible Google Nest Hub displays.

Smart features

• Motion detection: Can create an event and notification when motion is detected.
• AI person detection: Human movement is handled as a separate detection event.
• Real-time notifications: The eWeLink app can send notifications for detection events.
• Two-way audio: Audio communication can be used through the app or a compatible smart display.
• Local recording: Events can be recorded to a microSD card without a separate cloud subscription.
• Event list: Detection events are still shown without a microSD card, but no event image or replayable video is created.
• Local live view: Can be viewed through the OpenEdge interface without a cloud connection.
• Local configuration: Camera settings and RTSP/ONVIF functions can be managed from a browser.
• Smart home automations: Can be used in eWeLink scenes together with other compatible sensors and devices.

Power supply and operation

• Power supply: 5 V DC / 1 A.
• Power connector: USB-C.
• Extension cable: The package includes a 3-metre extension cable and cable clips for routing the power cable.
• Installation: Designed for indoor use while monitoring an outdoor area through window glass.

Technical specifications

• Product series: SONOFF CAM Series
• Model: CAM-S3W
• Product type: Window-mounted Wi-Fi security camera
• Camera resolution: 3 MP / 2K
• Lens aperture: F1.0
• Field of view: 100°
• Night imaging: Colour imaging based on available ambient light, without built-in infrared or white illumination
• Storage: TF/microSD card, up to 128 GB
• Cloud storage: Not supported
• Wi-Fi: IEEE 802.11 a/b/g/n, 2.4 GHz and 5 GHz
• Power supply: 5 V DC / 1 A
• Connector: USB-C
• Dimensions: 56 × 56 × 38 mm
• Housing: ABS + PC
• Colour: White
• Installation environment: Indoor
• Operating temperature: -10–40 °C
• Operating humidity: 5–95% RH, non-condensing
• Certifications: CE, FCC, RoHS

Additional features

• Three mounting brackets: Separate brackets are provided for narrow spaces, general installation and adjustable viewing angles.
• Magnetic mounting: The camera attaches magnetically to the metal bracket fixed to the glass, allowing it to be removed without removing the bracket.
• Single-pane glass: Provides the best image quality.
• Double-pane glass: Can be used, but slight reflections may occur; the manufacturer recommends the larger mounting bracket for this type of installation.
• Tinted and Low-E glass: May reduce image quality, especially in low-light conditions.
• Patterned glass and insect screens: The manufacturer does not recommend using the camera behind these surfaces.
• Night use: There is no infrared illumination, so an external ambient light source is required for usable images in very dark outdoor environments.
• Installation height: Designed for installation at a height of up to 2 metres.