Shelly Plus Uni
Device Identification
- Device name: Shelly Plus Uni
- Device model: SNSN-0043X
- Device SSID: ShellyPlusUni-XXXXXX
Short Description
The Shelly Plus Uni is a compact smart universal module featuring two solid-state relays with potential-free contacts, a pulse counter, analog input, and two digital inputs. It enables remote control of electrical devices via smartphone, tablet, PC, or home automation systems. The device can operate independently on a local Wi-Fi network or be controlled through cloud-based home automation services.
Remote access, control, and monitoring are possible from any location with internet connectivity, provided the device is connected to a Wi-Fi router and the Internet.
The device includes an embedded Web Interface for monitoring, control, and configuration of settings.
Main Applications
- Residential
- MDU (Multi Dwelling Units – apartments, condominiums, hotels, etc.)
- Light Commercial (small offices, retail stores, restaurants, gas stations, etc.)
- Government/Municipal
- University/College
Integrations
- Google Assistant
- Samsung SmartThings
- Amazon Alexa
Simplified Internal Schematics
Device Electrical Interfaces
Power Supply
- AC/DC power supply: VAC1 and VAC2
- DC power supply: +5 VDC and GND
Inputs
- 1 analog input: ANALOG IN
- 1 1-Wire data input: DATA
- 1 pulse counter input: COUNT IN
- 2 digital inputs: IN1 and IN2
Outputs
- 1 sensor power supply output: SENSOR VCC
- 2 potential-free contact solid-state relay outputs: OUT1 and OUT2
Add-on Interface
- Shelly proprietary serial interface
Connectivity
- Wi-Fi
- Bluetooth (for device inclusion only)
Safety Features
- PCB coating film
User Interface
Inputs
- One (Reset) button
- Press and hold for 5 seconds to enable Access Point mode and Bluetooth connection.
- Press and hold for 10 seconds to perform a factory reset.
Outputs
- Monochrome LED indication
- AP enabled, Wi-Fi disabled: 1 second ON / 1 second OFF
- Wi-Fi enabled, not connected: 1 second ON / 3 seconds OFF
- Connected to Wi-Fi network: Constantly ON
- Cloud enabled, not connected: 1 second ON / 5 seconds OFF
- Connected to Shelly Cloud: Constantly ON
- OTA update in progress: 0.5 second ON / 0.5 second OFF
- Button pressed and held for 5 seconds: 0.5 second ON / 0.5 second OFF
- Button pressed and held for 10 seconds: 0.25 second ON / 0.25 second OFF
Note: The LED states are prioritized in order listed. Each higher-priority state overrides the previous one.
Specifications
| Category | Value |
|---|---|
| Physical | |
| PCB size (L×W×H) | 40 × 21 × 7 mm / 1.57 × 0.83 × 0.28 in |
| Weight | 8.5 g / 0.3 oz (with cables) |
| Environmental | |
| Ambient temperature | -20 °C to 40 °C / -5 °F to 105 °F |
| Humidity | 30 % to 70 % RH |
| Electrical | |
| Power supply | |
| – 8–24 VAC – 9–28 VDC – 5 VDC (stabilized, via +5 VDC and GND) | |
| Power consumption | < 1 W |
| Input circuits ratings | |
| Digital inputs resistance | 50 kΩ |
| Digital inputs triggering voltage | 1.5 V (active low) |
| Output circuits ratings | |
| Max switching voltage | 30 V |
| Max switching current | 300 mA |
| Sensors, meters | |
| Voltmeter range | 0–15 VDC / 0–30 VDC (two-range) |
| Voltmeter accuracy | ±1% |
| Pulse counter input triggering voltage | 1.5 V (active low) |
| Pulse counter max frequency | 1 kHz |
| External sensors supported | Single DHT22 or up to five DS18B20 |
| 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 | |
| Schedules | 20 |
| Webhooks (URL actions) | 20, with up to 5 URLs per hook |
| Scripting | Yes |
| MQTT | Yes |
| CoAP | No |
Basic Wiring Diagram
NOTICE: The input connections on Shelly Plus Uni differ from those on the previous Shelly Uni model.
Legend
| Terminal | Color | Description |
|---|---|---|
| VAC1 | Red | 8–24 VAC / 9–28 VDC power supply input 1 |
| VAC2 | Black | 8–24 VAC / 9–28 VDC power supply input 2 |
| ANALOG IN | White | Analog input |
| SENSOR VCC | Yellow | Power supply for 1-Wire sensors |
| DATA | Blue | 1-Wire data line |
| +5 VDC | Gray | 5 VDC power supply positive input |
| GND | Green | 5 VDC power supply ground and sensor ground |
| COUNT IN | Purple | Pulse counter input |
| IN1 | Orange | Digital input 1 |
| IN2 | Brown | Digital input 2 |
| OUT1 | Black | Solid-state relay 1 terminals |
| OUT2 | Black | Solid-state relay 2 terminals |
Troubleshooting
Web Interface Guide
Read the Shelly Plus Uni Web Interface Guide
Components and APIs
Printed User Guide
Shelly Plus UNI Multilingual Printed User and Safety Guide.pdf
Compliance
- Shelly Plus Uni Multilingual EU Declaration of Conformity 2025-07-21.pdf
- Shelly Plus Uni UK PSTI ACT Statement of Compliance.pdf
Compliance Archive