Shelly 1PM Gen4 – smart switch power consumption with measurement

Shelly 1PM Gen4 – Smart Switch with Power Metering

Device identification

• Device name: Shelly 1PM Gen4

• Model: S4SW-001P16EU

• SSID (Wi-Fi network name): Shelly1PMG4-XXXXXXXXXXXX

• Bluetooth ID: 0x1029

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Overview

Shelly 1PM Gen4 is a smart switch with power metering that lets you control electrical appliances remotely as part of your home automation. It works both on your local Wi-Fi network and via cloud services.

Its compact size allows installation in wall boxes, behind sockets or switches, and in tight spaces.

Supports the Matter protocol and connects via Wi-Fi, Bluetooth and Zigbee.

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Key features

• Wi-Fi connectivity: Supports 802.11 b/g/n/ax standards.

• Bluetooth 5.0 and Zigbee support: Handy for setup and adding the device to your home automation system.

• Platform compatibility: Google Assistant, Amazon Alexa, Samsung SmartThings.

• Power metering: Monitor the energy consumed by the connected appliance (in watts, volts and amps).

• Convenient remote control: Via phone, tablet or computer – at home or away.

• Web interface: For controlling and configuring the device.

• BLE and Zigbee range extender: Extends the range of these signals.

• Automation and scripting:

  • Precise scheduling

  • Scripts (https://shelly-api-docs.shelly.cloud/gen2/Scripts/ShellyScriptLanguageFeatures/)

  • Webhooks, MQTT, HTTP API, etc.

• KNX net/IP support: https://shelly-api-docs.shelly.cloud/gen2/Integrations/KNX/

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Applications

Home automation

1. Lighting control and energy monitoring

2. Automation and monitoring of household appliances

3. Control of water heaters and heating appliances (max 16A)

4. Overload protection – cuts the power when consumption exceeds the set limit

Commercial buildings and shops

• Dividing lighting into zones and analysing energy costs

• Automatic switch-off of equipment at the end of the working day

Industrial use

• Control and monitoring of pumps/motors

• Load monitoring of solar or battery-powered systems

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Technical specifications

Physical characteristics

• Dimensions (HxWxD): 37 x 42 x 16 mm

• Weight: 27 g

• Max. screw terminal torque: 0.4 Nm

• Conductor cross-section: 0.2 – 2.5 mm²

• Conductor strip length: 6–7 mm

• Mounting: In-wall / in box

• Housing colour: Red

• Terminal colour: Grey

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Environmental conditions

• Operating temperature: –20 °C to +40 °C

• Humidity: 30% – 70%

• Max. altitude: 2000 m

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Electrical characteristics

• Power supply:

  • 110–240 V~ (AC)

  • 24–30 V⎓ (DC)

• Power consumption: < 1 W

• Neutral required: Yes

• External protection: Circuit breaker according to EN60898-1 (B or C characteristic, max 16A, min 6 kA breaking capacity)

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Output

• Max. voltage:

  • 240 V~

  • 30 V⎓

• Max. current:

  • 16 A (240 V~)

  • 10 A (30 V⎓)

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Sensors

• Voltage sensor (voltmeter): Yes

• Current sensor (ammeter): Yes

• Internal temperature sensor: Yes

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Radio

Wi-Fi

• Protocol: 802.11 b/g/n/ax

• RF frequency: 2412 – 2472 MHz

• RF output power: < 20 dBm

• Range:

  • Up to 30 m indoors

  • Up to 50 m outdoors

Bluetooth

• Version: 5.0

• RF frequency: 2402 – 2480 MHz

• RF output power: < 4 dBm

• Range:

  • Up to 10 m indoors

  • Up to 30 m outdoors

Zigbee

• Protocol: 802.15.4

• Acts as Zigbee repeater: Yes

• RF frequency: 2400 – 2483.5 MHz

• RF output power: < 20 dBm

• Range:

  • Up to 100 m indoors

  • Up to 300 m outdoors

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Microcontroller

• CPU: ESP-Shelly-C68F

• Flash memory: 8MB

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Firmware capabilities

• Schedules: up to 20

• Webhooks: up to 20, with max 5 URLs each

• Scripting: Yes

• MQTT support: Yes

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Interfaces and diagrams

Electrical inputs/outputs

• Inputs:

  • 1 switch/input (SW)

  • 5 power terminals (2 × N and 3 × L)

• Output:

  • 1 relay output (O) with power metering

• Additional interface:

  • Dedicated Shelly Add-on interface (⚠ High voltage!)

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User interface

• Button functions:

  • Hold 5 sec – Bluetooth + Access Point

  • Hold 10 sec – Factory reset

  • Press 5x – Switch Matter ↔ Zigbee

  • Press 3x – Zigbee pairing mode (active for 2 min)

• LED indications:

  • 1 sec ON / 1 sec OFF – AP on, Wi-Fi off

  • 1 sec ON / 3 sec OFF – Wi-Fi on but not connected

  • Steady light – Wi-Fi and cloud connection active

  • ½ sec ON/OFF – OTA update

  • ¼ sec ON/OFF – Factory reset

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Wiring diagram legend

Symbol	Meaning
O	Load output terminal
L	Live wire (110–240 V~)
SW	Switch input terminal (controls output O)
+	24–30 V⎓ positive terminal
N	Neutral wire / terminal
Ʇ	Ground / negative terminal (GND)

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User manual: Shelly 1PM Gen4 Manufacturer's website: Shelly 1PM Gen4