Shelly 1 & 1PM

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Allterco Robotics is an innovative company based in Bulgaria, they produce a range of smart products under the brand name Shelly. In this post we will take a look at two of them which are designed to be highly flexible, single circuit smart controllers.

The Shelly 1 and 1PM are designed to sit in line within a circuit and provide a smart switch capability in addition to any existing traditional switches you may have in place already. They are ideal to retrofit in to existing lighting or power circuits and can also be a good fit for rewiring or new build applications.

For retrofit applications the device is typically located behind the wall switch or within / above the (primary) light fitting intersecting with the live feed to the lamp , one thing to be aware of is that the device requires a neutral feed along with live to permanently power it, it is common in UK households to not have a neutral at the wall switch. For rewire and new build applications the ideal location is local to the circuit breaker either attached to the same DIN rail or a supplemental one.

Below is an example wiring diagram showing how the Shelly is retrofitted in to an existing lighting circuit. It will happily reside within a one way or multi-way switch configuration.

Example wiring diagram

You may be wondering how do you fit such a device in to a wall switch back box or a ceiling rose? This is easily accomplished due to the small size of the device. As you can see from the picture below they measure roughly 4 cm x 4 cm x 2 cm.

Once electrically installed you then need to connect the device to your WiFi network which should happen automatically once you power the device on. These devices, like most other smart devices, need to reside on a 2.4 GHz WiFi network so ensure that your WiFi router supports this.

Once on the WiFi network open the Shelly mobile application, if this is your first device then download the app from the relevant app store for your smart phone, and follow the instructions to add the device. The Shelly mobile application makes use of the Shelly cloud via the internet to communicate with the device and has many useful features.

These devices can support loads up to 16 Amps and the only difference between the Shelly 1 and Shelly 1PM is that the 1PM also has power monitoring so that you can see at a glance the amount of power being consumed by the devices or lighting connected to it.

We strongly recommend that any work carried out to your electrical circuits is completed by competent and qualified electricians. If you are interested in implementing these or other smart home technologies then please feel free to contact us and we will be happy to discuss your needs.

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