Device image(s)
Device identification
- Device name: Shelly Dimmer Gen4
- Device model: S4DM-0A101WWL
- Device SSID: ShellyDimmerG4-XXXXXXXXXXXX
- BLE ID: 0x1075
- EAN: 3800238072353
Short description
Shelly Dimmer Gen4 (the Device) is a single-channel smart dimming controller which allows remote control of dimmable lights and dimming drivers through a mobile phone, tablet, PC, or home automation system. It supports Wi-Fi, Bluetooth, and Zigbee connectivity. The Device can work standalone in a local Wi-Fi network or be operated through cloud home automation services. It can be accessed, controlled, and monitored remotely from any place with internet connectivity, as long as it's connected to the Internet.
Shelly Dimmer Gen4 has an embedded Web Interface for monitoring and controlling the device, as well as adjusting its settings. The device can be used as a trailing edge dimmer switch, with or without a neutral wire.
The Device is Matter compatible.
Main features
- No need for neutral: The Device can be used without a neutral wire.
- Bypass: Required when used without neutral and the load is under 20 W. Helps prevent light leakage when turned off.
- Groups of lights: Groups can be used, but all lights must have the same consumption (same model and manufacturer).
- Bluetooth: Complies with Bluetooth standard; enables short-range data exchange.
- BLE Gateway: Facilitates communication between BLE and Wi-Fi-enabled devices.
- Wi-Fi: Connects to wireless networks.
- Wi-Fi Range extender: Retransmits Wi-Fi signals to extend reach.
- Zigbee: Integrates with platforms like Home Assistant, Amazon Alexa, Samsung SmartThings, Google Smart Home.
- Zigbee Range extender for IoT devices: Expands Zigbee network range by receiving, strengthening, and retransmitting signals.
- Scripting: Enables automation via custom scripts.
- Basic Schedules: Supports weekly schedules and routines including brightness, transition duration, and flip value.
- Advanced Schedules: Supports detailed annual schedules with time adjustments from seconds to months, including brightness, transition duration, and flip value.
- Auto on/off timers: Allows setting automatic on/off times.
- Local actions: Enables local automation within the Wi-Fi network (brightness, transition, flip value).
- Webhooks: Supports lightweight, event-driven communication with other devices.
- Compatibility: Highly compatible with third-party home automation systems.
- No need for hub: Ready for use locally or remotely via Shelly Smart Control or third-party systems.
- Activity log: Stores detailed event history.
- KVS (Key-value storage): Provides persistent storage for key-value pairs.
- Safety: Over current/voltage/power protections. These may not function properly without a neutral wire.
- Power measurement:
- Voltage (V), current (A), and consumption (W) are displayed when used with neutral.
- Power consumption cannot be measured without neutral.
- Night Mode: Sets specific brightness during nighttime hours.
- Transition duration: Controls dimming time from 0% to 100% (on) and 100% to 0% (off).
- Minimum brightness on toggle On: Applies minimum brightness (default: 3%) when turning on, if current brightness is below this threshold. Not applied if explicit transitions are defined in Schedules/Actions.
- Min/Max brightness: Adjusts dimming range for more precise control.
- Switch/Button input mode: Flexible input control via switches/buttons:
- One-button dimming control
- Dual-button dimming control
- Button fade rate: Controls how quickly output brightness changes while holding buttons (default: 3x).
- Button presets: Sets state on double-click (default: 100%).
- Automatic dimming calibration: Ensures smooth dimming across full range. Must be performed after new installation, factory reset, or load change:
- Starts automatically on first toggle (via physical switch, app, UI, or RPC).
- Can be triggered by simultaneously long-pressing both buttons for 5 seconds. Calibration lasts up to 2 minutes. On success, light turns on for 10 seconds, then turns off.
- Virtual components: Dynamically created components that don’t exist physically at startup.
- KNX: Supports KNXnet/IP communication.
- Wide range of integrations: Integrates with third-party systems via HTTP API, MQTT(s), Webhooks (HTTP/HTTPS), UDP.
- Integration with Smart Home Platforms: Works with Google Home, Alexa, and Samsung SmartThings for voice control and automation.
- Local and Cloud Control: Functions independently in local Wi-Fi network or via cloud services.
- Matter: Enables quick and simple setup in smart home ecosystems.
Use cases
- Retrofit existing lighting systems even without a neutral wire, preserving current switches and wiring.
- Control dimmable lights to set perfect brightness levels.
- Create smart schedules for automated brightness adjustments throughout the day.
- Enhance ambiance in restaurants, bars, or cafes.
- Sync lights with sunrise/sunset times using smart schedules.
- Enable night mode for reduced brightness at night.
- Integrate with third-party systems like Home Assistant, Google Home, Alexa, SmartThings.
- Dim lights up/down with single or double button press.
- Improve safety by automating lights to turn on when motion is detected (e.g., Shelly Motion).
Main applications
- Residential
- MDU (Multi Dwelling Units – apartments, condos, hotels, etc.)
- Light commercial (small offices, retail stores, restaurants, gas stations, etc.)
- Government/municipal
- University/college
Integrations
Amazon Alexa supported capabilities
Google Smart Home supported traits
Samsung SmartThings supported capabilities
Simplified internal schematics
Device electrical interfaces
Inputs
- 2 switch/button inputs on screw terminals: S1 and S2
- 3 power supply inputs on screw terminals: 1 N and 2 L
Outputs
- 2 internally bridged outputs on screw terminals: O (x2)
Add-on interface
Not supported
Connectivity
- Wi-Fi
- Bluetooth
- Zigbee
- Matter
Safety functions
- Overheating protection
- Overpower protection*
- Overvoltage protection*
- Undervoltage protection*
- Overcurrent protection
Works only when used with Neutral.
Supported load types
- Dimmable LED lamps: up to 150 W
- Incandescent bulbs: up to 200 W
- Halogen lamps: up to 200 W
- Iron-core transformer with low-voltage incandescent lamps: up to 200 VA
- Dimmable electronic transformers: up to 200 W
User interface
Inputs
- One (Control) button
- Press and hold for 5 seconds: Enables Device access point and Bluetooth connection.
- Press and hold for 10 seconds: Factory reset.
- Press 5 times: Switches from Matter (default) to Zigbee profile. Device enters inclusion mode for 3 minutes. Include following your Zigbee system’s instructions.
- Press 3 times: Re-enables inclusion mode for another 3 minutes if previous window was missed.
Outputs
- LED (monocolor) indication
- AP enabled, Wi-Fi disabled: 1 sec ON / 1 sec OFF
- Wi-Fi enabled, not connected: 1 sec ON / 3 sec OFF
- Connected to Wi-Fi network: Constantly ON
- Cloud enabled, not connected: 1 sec ON / 5 sec OFF
- Connected to Shelly Cloud: Constantly ON
- OTA (Over-the-Air Update): ½ sec ON / ½ sec OFF
- Button pressed and held for 5 seconds: ½ sec ON / ½ sec OFF
- Button pressed and held for 10 seconds: ¼ sec ON / ¼ sec OFF
List starts with initial status and lowest priority. Each subsequent state cancels the previous one.
Specifications
| Quantity | Value |
|---|---|
| Physical | |
| Size (HxWxD) | 38.5 x 43.5 x 17 mm / 1.52 x 1.71 x 0.67 in |
| Weight | 24.3 g / 0.86 oz |
| Screw terminals max torque | 0.4 Nm / 3.5 lbin |
| Conductor cross section | 0.5 to 4 mm² / 20 to 11 AWG (solid, stranded, bootlace ferrules) |
| Conductor stripped length | 5 to 6 mm / 0.20 to 0.24 in |
| Mounting | In-wall |
| Shell material | Plastic |
| Shell color | Lime |
| Print color | Black |
| Connectors color | Gray |
| Environmental | |
| Ambient working temperature | -20°C to 40°C / -5°F to 105°F |
| Humidity | 30% to 70% RH |
| Max. altitude | 2000 m / 6562 ft |
| Electrical | |
| Power supply | 220–240 V~ 50 Hz |
| Power consumption | < 1.5 W |
| Neutral required | No |
| Min. load without neutral and without bypass | 20 W |
| Dimming type | Trailing edge |
| External protection | 16 A, tripping characteristic B or C, 6 kA interrupting rating, energy limiting class 3 |
| Output circuits ratings | |
| Max. output power | 200 W |
| Max. current | 0.85 A |
| Sensors, meters | |
| Voltmeter (AC) | 180 V – 280 V |
| Voltmeter accuracy | ± 5% (when used with neutral) |
| Ammeter (AC) | 0 A – 3 A |
| Ammeter accuracy | ± 5% (when used with neutral) |
| Internal-temperature sensor | Yes |
| Precise measurement is possible only when used with neutral. | |
| Radio | |
| Wi-Fi | |
| Protocol | 802.11 b/g/n/ax |
| RF band | 2401 – 2483 MHz |
| Max. RF power | < 20 dBm |
| Range | Up to 30 m / 100 ft indoors, 50 m / 160 ft outdoors (Depends on local conditions) |
| Bluetooth | |
| Protocol | 5.0 |
| RF band | 2400 – 2483.5 MHz |
| Max. RF power | < 4 dBm |
| Range | Up to 10 m / 33 ft indoors, 30 m / 100 ft outdoors (Depends on local conditions) |
| Zigbee | |
| Protocol | 802.15.4 |
| Zigbee repeater | Yes |
| RF bands | 2400 to 2483.5 MHz |
| Max. RF power | < 20 dBm |
| Range | Up to 100 m / 328 ft indoors, 300 m / 984 ft outdoors (Depends on local conditions) |
| Microcontroller unit | |
| CPU | ESP-Shelly-C68F STM32 G051 |
| Clock frequency | ESP-Shelly-C68F: 40 MHz |
| Flash | 8 MB |
| Firmware capabilities | |
| Schedules | 20 |
| Webhooks (URL actions) | 20 with 5 URLs per hook |
| Scripting | Yes |
| MQTT | Yes |
Basic wiring diagrams
Legend
| Terminals | Description | Wires | Description |
|---|---|---|---|
| L (x2) | 2 live terminals | L | Live (220–240 V~) wire |
| N | Neutral terminal | N | Neutral wire |
| O (x2) | 2 output terminals to the load | ||
| S1, S2 | Switch/button input terminals for light control |
Components and APIs
Compliance
- Shelly Dimmer Gen4 multilingual EU declaration of conformity
- Shelly Dimmer Gen4 UK PSTI ACT Statement of Compliance