Smart Switch Sonoff SPM-Main

About Smart switch Sonoff SPM-Main Wi-Fi White

Sonoff SPM-Main smart switch

The Sonoff SPM-Main smart switch, which allows the measurement of energy consumption and supports connectivity via Ethernet and Wi-Fi. It can handle up to 128 channels - you can combine it with up to 32 SPM-4Relay switches (4 channels each), which are available for purchase separately. In addition, overcharge protection prevents damage to your devices. The product is also very easy to install.

multiple apps

The SPM-Main switch will prove its worth in many different applications. For example, it will let you find out how much electricity your tenants use per month or find out the energy consumption of a shopping center or office. The product will also come in handy in a server room or cryptocurrency mine - the overload protection function will allow you to avoid damaging certain equipment.

reliable signal transmission

Enjoy the ability to connect devices. SPM-Main communicates with the cloud via Ethernet or Wi-Fi connectivity. It also connects to SPM-4Relay switches via RS-485, so it can provide stable transmission over long distances. Connection problems are a thing of the past!

energy consumption meter

Do you want to check the changes in energy consumption in each room of the office? Or do you care to know how much electricity is used by your tenants? With Sonoff it is possible! SPM-Main and SPM-4Relay switches allow you to accurately measure power consumption. You can find all the information on the eWeLink app. This lets you check your energy consumption without leaving your home - just pick up your phone!

overload protection

Increase security in your server room and don't be afraid to damage your devices. The switch offers an overload protection function. When activated, the equipment will automatically turn off when the current, voltage or power reaches the value indicated in the application. A charge delay function is also available.

Supports up to 128 channels

One SPM-Main module allows controlling up to 32 SPM-4Relay switches. In addition, each SPM-4Relay offers up to 4 independent channels with a maximum load of 20A each. This means that SPM-Main can handle up to 128 channels! This makes it ideal, for example, in an apartment block, making it possible to check the energy consumption of rented apartment tenants.

Additional facilities

You can now save the history of energy consumption measurements for the last 180 days. The switch is equipped with an SD card slot (8-32 GB, SDHC). This allows you to export data conveniently and ensures that you won't miss any important information. Mounting the SPM-Main and SPM-4Relay switches will not cause any problems either. You can easily mount them on the guide rail. Note: SD card is not included in the kit.