Typically used for
Lights
Appliances
Irrigation
Pool automation
Water manifolds
Key Features
LAN, Wi-Fi, and Bluetooth connection
2 outputs, 16A each. Total device maximum of 25A
Dry contacts
DIN rail mountable
2-phase control
Easy control through the Shelly app, various protocols, and platforms, as well as voice assistants
Supports KNXnet / IP communication
Device identification
Device name: Shelly Pro 2 v.1
Device model: SPSW-202XE16EU
Device SSID: ShellyPro2-XXXXXX
Short description
Shelly Pro 2 is a DIN rail mountable 2-channel smart switch with potential-free contacts. Enhanced with all the gen2 firmware flexibility and LAN connectivity, it provides professional integrators with many more options for end customer solutions. It can work standalone in a local Wi-Fi network or it can also be operated through cloud home automation services.
Shelly Pro 2 can be accessed, controlled and monitored remotely from any place where the User has internet connectivity, as long as the device is connected to a Wi-Fi router and the Internet.
Shelly Pro 2 has an embedded Web Interface which can be used to monitor and control the device, as well as adjust its settings.
Main applications
Residential
MDU (Multi Dwelling Units - apartments, condominiums, hotels, etc.)
Light commercial (small office buildings, small retail/restaurant/gas station, etc.)
Government/municipal
University/college
Integrations
Google
Alexa
Samsung SmartThings
Device electrical interfaces
Inputs
2 switch/button inputs on screw terminals: SW1 and SW2
2 power supply inputs on screw terminals: 1 N and 1 L
2 relay inputs: I1 and I2
Outputs
2 relay outputs: O1 and O2
Ethernet port
1 RJ45 connector
⚠CAUTION! Plug in or unplug the LAN cable only when the Device is powered off! The LAN cable connector must not be metallic in the parts touched by the user to plug in or unplug the cable.
Add-on interface
Shelly proprietary serial interface
⚠CAUTION! High voltage on the add-on interface when the Device is powered!
Connectivity
Ethernet
Wi-Fi
Bluetooth
Safety features
Overheating protection
Supported load types
Resistive (incandescent bulbs, heating devices)
Capacitive (capacitor banks, electronic equipment, motor start capacitors)
Inductive with RC Snubber (LED light drivers, transformers, fans, refrigerators, air-conditioners)
User interface
Inputs
One tactile dome button
Press and hold 5 sec to reboot.
Press and hold 10 sec to factory reset.
Outputs
LED indication
Power (red): Red light indicator will be on if power supply is connected.
Wi-Fi (varies):
Blue light indicator will be on if in AP mode.
Red light indicator will be on if in STA mode and not connected to a Wi-Fi network.
Yellow light indicator will be on if in STA mode and connected to a Wi-Fi network. Not connected to Shelly Cloud or Shelly Cloud disabled.
Green light indicator will be on if in STA mode and connected to a Wi-Fi network and to the Shelly Cloud.
The light indicator will be flashing Red/Blue if OTA update is in progress.
LAN (green): Green light indicator will be on if LAN is connected.
Out 1 (red): Red light indicator will be on if the Output 1 relay is closed.
Out 2 (red): Red light indicator will be on if the Output 2 relay is closed.
Type | Value |
|---|---|
Physical | |
Size (HxWxD): | 94x19x69 ±0.5 mm / 3.70x0.75x2.71 ±0.02 in |
Weight: | 76 g / 2.68 oz |
Mounting: | DIN rail |
Screw terminals max torque: | 0.4 Nm / 3.54 lbin |
Conductor cross section: | 0.5 to 2.5 mm² / 20 to 14 AWG (green connectors) |
Conductor stripped length: | 6 to 7 mm / 0.24 to 0.28 in (green connector) |
Shell material: | Plastic |
Color: | Gray |
Environmental | |
Ambient 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 voltage AC: | 110 - 240 V |
Power supply voltage DC: | N/A |
Power consumption: | < 3 W |
Neutral not needed: | No |
Output circuits ratings | |
Max switching voltage AC: | 240 V |
Max switching voltage DC: | N/A |
Max switching current AC: | 16 A per channel, 25 A total |
Max switching current DC: | N/A |
Sensors, meters | |
Temperature sensor: | Yes |
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-D0WDQ6 |
Flash: | 8 MB |
Firmware capabilities | |
Schedules: | 20 |
Webhooks (URL actions): | 20 with 5 URLs per hook |
Scripting: | Yes |
MQTT: | Yes |
CoAP: | No |
Basic wiring diagram
 Resistive load |  Inductive load and RC snubber |
Legend
Terminals | Wires | ||
|---|---|---|---|
I1, I2 | Load circuit input terminals | L1(A) | Load circuit 1 live (110-240 V) wire |
O1, O2 | Load circuit output terminals | L2(B) | Load circuit 2 live (110-240 V) wire |
SW1, SW2 | Switch/button input terminals | L3(C) | Device power supply live (110-240 V) wire |
L | Live (110-240 V) terminal | N | Neutral wire |
N | Neutral terminal | ||
LAN | Local Area Network RJ 45 connector |
What are the differences between the different generations of Shelly products?
Each new generation adds more power, memory, and features:
Gen 1 offers basic control;
Gen 2 (Plus Series, Mini Series, Pro Series) adds Bluetooth, scripting, and better security;
Gen 3 improves performance, adds Matter (starting from firmware version 1.6.0 or newer) and advanced monitoring;
Gen 4 offers multi-protocol connectivity, featuring Wi-Fi 6, Bluetooth, Zigbee, and Matter.
Can I control the device via Bluetooth?
No, the protocol is used only for device inclusion, allowing for quick and easy setup through the Shelly Smart Control app.
For bluetooth control it is required to have another Bluetooth device such as Shelly BLU Button or Shelly BLU Motion to interact.
Additionally, Shelly devices can function as a BLE gateway, bridging Shelly BLU devices to your Wi-Fi network.
Is it possible to use the device without a hub?
Yes, Shelly devices (except for Wave devices) operate independently without the need for a hub. They connect directly to your Wi-Fi network, and you can control them via the Shelly Smart Control app, web interface, or through integrations with platforms like Google Home, Alexa, Home Assistant and Samsung SmartThings.
Use cases
Control lights on 2 phases
Automate the lights and optimize their energy consumption through smart schedules, timers, and extended scripting functionalities.
Automate your valves
Use Shelly Pro 2 to control the motorized valves in your water distribution box and control heating, cooling, or any other motorized valve in your facility.
Sockets automation for efficient energy usage
Make sure that no energy goes to waste by automating the sockets' power supply with Shelly Pro 2 and use the smart scheduling function to cut off the power to all heavy consuming electrical appliances between 7:00 PM and 7:00 AM d
HTTP/HTTPS webhooks for quick connection
Enhanced with HTTP/HTTPs webhooks, Shelly Pro line can easily connect with, notify or control other compatible equipment or 3rd party automation system.