Shelly Plus Smoke
Device Identification
- Device name: Shelly Plus Smoke
- Device model: SNSN-0031Z
- Device SSID: ShellyPlusSmoke-XXXXXX
Short Description
The Shelly Plus Smoke (the Device) is a smart photoelectric smoke alarm designed to detect slow-smoldering fires that may burn for hours before igniting fully. Such fires can originate from sources like cigarettes left unattended on sofas or bedding.
Features
- Battery-powered operation
- Visual LED indication
- Low battery warning
- Alarm pause (Hush mode)
- Built-in test function
- Easy installation
- Certified to DIN EN 14604
Main Applications
- Residential use
Connectivity
- Wi-Fi
- Bluetooth
Users can enable or disable each connectivity option as needed.
User Interface
Inputs
- One push button:
- Press and hold for 3 seconds to initiate a device test.
- Press briefly to silence an active alarm.
- Press briefly 3 times to enter Setup mode (active for 2 minutes).
- Press briefly 5 times to perform a factory reset (device enters Setup mode for 2 minutes).
Outputs
LED Indication
- Normal operation: Red light flashes once every 53 seconds.
- Testing: Three rapid red flashes.
- Alarm state: Continuous red flashing.
- Malfunction: Two red flashes every 53 seconds.
- Hushed alarm: One red flash every 10 seconds.
- Low battery warning: One red flash every 53 seconds (with audible alert).
- Hushed low battery warning: One red flash every 53 seconds (no sound).
- Setup mode (initial): Rapid green flashing.
- Setup mode (final 2 minutes): Slow green flashing.
Buzzer
- Button pressed: One short beep.
- Testing: Three short beeps.
- Alarm: Continuous loud beeping.
- Low battery warning: One short beep every 53 seconds.
Specifications
| Category | Type | Value |
|---|---|---|
| Physical | Size (DxH) | 86 × 31 ± 0.5 mm / 3.39 × 1.22 ± 0.02 in |
| Weight | 95 ± 1 g / 3.35 ± 0.05 oz | |
| Mounting | Ceiling | |
| Shell material | Plastic | |
| Color | White | |
| Device lifespan | 10 years | |
| Environmental | Ambient temperature | -0 °C to 55 °C / 32 °F to 131 °F |
| Humidity | 30 % to 95 % RH | |
| Electrical | Power supply voltage (AC) | N/A |
| Power supply voltage (DC) | 1 × 3 V CR123A / CR17335 battery | |
| Battery lifespan | 5 years (with original battery) | |
| Sensors, Meters | Smoke sensor | Photoelectric |
| Radio | RF band | 2400 – 2495 MHz |
| Max. RF power | <20 dBm | |
| Wi-Fi protocol | 802.11 b/g/n | |
| Wi-Fi range | Up to 30 m / 100 ft indoors; up to 50 m / 160 ft outdoors (Depends on local conditions) | |
| Bluetooth protocol | 4.2 | |
| Bluetooth range | Up to 10 m / 33 ft indoors; up to 30 m / 100 ft outdoors (Depends on local conditions) | |
| MCU | CPU | ESP32-U4WDH |
| Flash | 4 MB | |
| Firmware Capabilities | Webhooks (URL actions) | 10 webhooks with 2 URLs per hook |
| Scripting | No | |
| MQTT | Yes | |
| CoAP | No |
Troubleshooting
...
Web Interface Guide
Read the Shelly Plus Smoke web interface guide
Components and APIs
Compliance
- Shelly Plus Smoke Alarm multilingual EU declaration of conformity 2025-07-21.pdf
- Shelly Plus Smoke Alarm UK PSTI ACT Statement of compliance.pdf
Compliance archive: