Shelly Plus Smoke
Device identification
Device name: Shelly Plus Smoke
Device model: SNSN-0031Z
Device SSID: ShellyPlusSmoke-XXXXXX
Short description
Shelly Plus Smoke (the Device) is a smart photoelectric smoke alarm, which is effective at detecting slow fires that smolder for hours before bursting into flames.
Sources of these fires may include burning cigarettes left on couches or bedding.
Features
Battery operated
LED indication
Low battery warning
Alarm pause (Hush mode)
Test function
Easy Installation
DIN EN 14604 certified
Main applications
Residential
Connectivity
Wi-Fi
Bluetooth
Each connectivity option can be enabled or disabled by the user.
User interface
Inputs
One push button
Press and hold for 3 sec to test the Device.
Press briefly to silence an alarm.
Press briefly 3 times to put the Device in Setup mode for 2 minutes.
Press briefly 5 times to factory reset. Device stays in Setup mode for 2 minutes.
Outputs
LED indication
Normal operation: Red light flashes once every 53 seconds.
Testing: 3 red light flashes.
Alarm: Continuous red light flashes.
Malfunction: Red light flashes twice every 53 seconds
Hushed alarm: Red light flashes once every 10 seconds.
Low battery warning: Red light flashes once every 53 seconds (with sound).
Hushed low battery warning: Red light flashes once every 53 seconds (with no sound).
Device in Setup mode: Green light flashes quickly.
Device in Setup mode for 2 minute: Green light flashes slowly.
Buzzer
Button pressed: 1 short beep.
Testing: 3 short beeps.
Alarm: Continuous loud beeps.
Low battery warning: Short beep once every 53 seconds.
Specifications
Type | Value |
|---|---|
Physical | |
Size (DxH): | 86x31 ±0.5 mm / 3.39x1.22 ±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: | 1x 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 and 50 m / 160 ft outdoors |
Bluetooth Protocol: | 4.2 |
Bluetooth Range: | Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors |
MCU | |
CPU: | ESP32-U4WDH |
Flash: | 4 MB |
Firmware capabilities | |
Webhooks (URL actions): | 10 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
Battery material safety data sheet
Printed user guides
Shelly Plus Smoke multilingual printed user and safety guide.pdf
Shelly Plus Smoke networking guide
