Shelly 1PM

Single relay switch with power metering

What is Shelly 1PM?

Single relay switch with power metering

We developed Shelly 1PM with an integrated WEB interface for device management and a secure OTA update. This device allows you to monitor the status and history, as well as the current and past electrical power consumption for the day, week, month or year.


  • No HUB required.
  • Wide range of voltage support.
  • Precise monitoring of your appliances power consumption.
  • Internal temperature sensor for overheating protection.
  • Designed to fit in most standard electrical boxes and switches.
  • It can be integrated to work with all other Shelly devices.
  • Compatible with Android, iOS, Amazon Alexa, Google Assistant, and home automation servers using MQTT, CoAP, and REST API.
  • Easily make your Arduino project live and usable in your automation project.


Power supply AC 110-230V ±10%, 50/60Hz
Power supply DC 24 – 60V
Dry contacts No
Roller shutter mode No
Device temperature protection Yes
Overload protection Yes
Power measurement Yes
Working without neutral line No
Channels 1 Channel
Maximum load 16A
Operational temperature 0°C to + 40°C
Device power consumption < 1 W
Intelligent On/Off Yes
Local and remote control Yes
Sunrise/Sunset Yes
Weekly Schedule Yes
UL Listed option No
Wireless/WiFi Protocol 802.11 b/g/n
Radiofrequency 2400 – 2500 MHz
Radio signal power 1mW
Range up to 50 m outdoors and up to 30 m indoors (depending on the building materials)
Size 41mm x 36mm x 17mm

Wiring diagrams

How to connect

Device pinout


Use cases

Lighting control

Are you about to watch a movie, all set up on the sofa with popcorn in your lap? Or you are going to bed and need to switch off all the lights? To avoid this, install Shelly 1PM at home, and control your lights with just one tap via your smartphone, or with your voice.

Motion sensor with light control

Garden walks in the evening are such a pleasure, and Shelly 1PM allows you to skip coming back to turn on the lights manually. With Shelly 1PM and a motion detector, you may use it as a motion detection switch for your outdoor lights.


Shelly 1PM Controlled Power Strip / Extension Cord

Make your power strips smarter without a huge cost.

Learn More

Shelly 1PM water heater, Home Assistant and Node-RED

Learn how you can integrate Shelly 1 PM with Home Assistant and Node-RED to control a water heater. Don’t worry, you won’t burn your house.

Learn More

Electric Heating With Shelly 1PM

Automate your floor heating with this step-by-step guide and reduce electrical consumption by limiting heating levels if you are away from home.

Learn More