Shelly Plus 1PM - smart switch power consumption with measurement

Shelly Plus 1PM - Smart Switch with Power Metering

Device identification

• Device name: Shelly Plus 1PM

• Device model: SNSW-001P16EU

• Device SSID: ShellyPlus1PM-XXXXXX

---

Short description

Shelly Plus 1PM is a compact smart switch with power metering. It lets you control electrical appliances remotely from a mobile phone, tablet, PC or home automation system.

The device can work standalone on a local Wi-Fi network or with cloud-based home automation services.

The device can be monitored, controlled and configured via its web interface and is designed to fit into standard wall boxes, behind sockets or light switches, or in other places with limited space.

---

Main applications

• Residential

• Multi-dwelling buildings (apartment blocks, hotels)

• Light commercial (offices, shops, restaurants, petrol stations)

• Government and municipal buildings

• Universities and colleges

---

Integrations

• Google

• Samsung SmartThings

• Amazon Alexa

---

Electrical interfaces

Inputs:

• 1 switch/button input (SW) on a screw terminal

• 5 power inputs on screw terminals: 2 N (+) and 3 L (Ʇ)

Outputs:

• 1 relay output with power metering (O)

Add-on interface:

• Shelly proprietary serial interface
  ⚠ Note: the add-on interface carries mains voltage when the device is powered!

---

Connectivity

• Wi-Fi

• Bluetooth

---

Safety features

• Overheating protection

• Overvoltage protection

• Overload protection

• Overpower protection

---

Supported load types

• Resistive (incandescent bulbs, heaters)

• Capacitive (capacitors, electronics, motor start capacitors)

• Inductive with RC snubber (LED drivers, transformers, fans, fridges, air conditioners)

---

User interface

Input:

• Single button press

• Hold for 5 s: AP and Bluetooth connection

• Hold for 10 s: factory reset

Output:

• LED (single-colour) indicator

• Flashing patterns depending on AP, Wi-Fi, cloud connection and OTA updates

---

Physical specifications

• Size: 37x42x16 ±0.5 mm

• Weight: 27 g

• Mounting: wall box

• Max screw terminal torque: 0.4 Nm

• Wire cross-section: 0.5–1.5 mm²

• Wire stripping length: 5–6 mm

• Housing: plastic, red

Environment:

• Operating temperature: -20…40 °C

• Humidity: 30–70 % RH

• Max altitude: 2000 m

---

Electrical specifications

• Supply voltage: 110–240 VAC / 24–30 VDC

• Power consumption: <1.2 W

• Max AC voltage: 240 V

• Max DC voltage: 30 V

• Max AC current: 16 A

• Max DC current: 10 A

• Built-in temperature sensor: Yes

• AC voltmeter: Yes

• AC ammeter: Yes

---

Wireless connectivity

• Wi-Fi: 802.11 b/g/n, 2400–2495 MHz, <20 dBm, range 30 m indoors / 50 m outdoors

• Bluetooth: 4.2, range 10 m indoors / 30 m outdoors

---

Microcontroller

• CPU: ESP32-U4WDH

• Flash: 4 MB

---

Firmware capabilities

• Schedules: 20

• Webhooks: 20, 5 URLs per hook

• Scripting: Yes

• MQTT: Yes

• CoAP: No

---

Wiring terminals (legend)

Terminal	Description
O	Load output
SW	Switch input
N	Neutral
L	Live (110–240 V)
+	24–30 VDC positive
GND	24–30 VDC ground
Ʇ	24–30 VDC ground terminal

User manual: Shelly Plus 1PM multilingual user and safety guide.pdf Manufacturer's website: Shelly Plus 1PM