Shelly 1PM

Single-channel relay with power metering



What is Shelly 1PM?

Consumption history, anywhere, at anytime.

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 -40 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 maybe you are going to bed and need to switch off all the lights, so annoying. To avoid these unpleasant situations, install Shelly 1PM at home, and you will be able to control your lights with just one tap via your smartphone, or with your voice. With the compact size of Shelly 1PM you can make any light switch smart.

High current switch

Do you have a water heater at home, but sometimes you forget to turn it On/Off, and that results in not having hot water or worse – high electricity bills? To avoid these unpleasant situations, you can use Shelly 1PM to monitor and control any appliance, with peace of mind about your energy consumption. With the Shelly Cloud app, you can turn on your water heater remotely before getting home so you can enjoy a hot shower and relax after a busy day.

Power monitoring

Pre-load your washing machine to work during the best times-of-use according to energy rates. Shelly 1PM allows you to optimize both energy consumption at home and make savings at the same time. Its integrated precise power meter lets you measure and be aware of the overall consumption of the connected electric appliances.

Overheating protection

Overheating is one of the most common problems of loaded electrical devices. When you are away from home, you often leave appliances like your water heater and dishwasher to work. To not worry about fire hazards at home, use Shelly 1PM. With its internal temperature sensor, the device will turn off the circuit if the temperature goes above a dangerous level.

Integration in appliances

Cooking a perfect meal for dinner is sometimes a challenge as you have to turn on the oven, the kitchen hood, and go from one end of the kitchen to the other. Forgetting about your laundry and letting it soak is not pleasant too. With Shelly 1PM, you can control a wide range of home appliances. You will be able to turn them On/Off through your mobile phone and receive notifications when your meal is cooked, or laundry is done.

Motion sensor with light control

Garden walks in the evening with your loved ones are such a pleasure, and Shelly 1PM allows you to skip coming back to the switch to turn on the lights. With Shelly 1PM and a motion detector, you may use it as a motion detection switch for your outdoor lights. Wandering around your garden has never been more careless and pleasant.


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