SONOFF Smart Stackable Power Meter

This stackable power meter realizes smart management with overload protection,

 metadata monitoring and electricity statistics.

 RS-485 Communication Allows for "Smart Stackable"

The SPM-Main communicates with the cloud through Ethernet or WiFi, and communicates

with the SPM-4Relays through RS-485, which allows for multi-terminal

and stable long-distance data transmission.

 Power Metering

Want to know the power consumption changes of each stall? Want to realize the unified

management of the whole shopping mall? By checking eWeLink App on your mobile phone,

you can monitor the electricity usage without leaving home. Through the

eWeLink App, you can obtain the power consumption through a touch.

 Get Over 180-day of Energy Usage Data

Available SD card local storage. You can insert the SD card into SPM-Main to download

 and check over 180 days of your energy usage history at any time of the day through HTTP API.

 No need to worry about missing the important information.