The SmartPi expansion module extends the Raspberry Pi with interfaces to measure voltage and current in a contactless manner. It enables to control electricity production consumption and turns the Raspberry Pi into a full featured smart meter. All measurement data can be stored and are accessable via the local network or Internet for disposal.
Current is measured contactless via inductive current sensors. In the standard version currents up to 100 A can be measured. By exchanging the series resistor to use other sensors measure currents up to 300 A is feasible.
The module has 4 x 3.5 mm jack inputs. Measurement of all three phases and even the neutral conductor is possible. To get other dimensional units in addition to the current measurement, the SmartPi module has screw terminals to measure voltage in range of 400 V on all phases. Hereby e.g. the direction of energy flow is determinable.
The interfaces to the Raspberry Pi are electrically isolated to ensure maximum safety.
Website and REST interface:
Open Source software is written in Go and includes all the necessary drivers, a web server with web page and a REST interface. All measurement data can be logged and displayed on tablet or smartphone. The REST interface allows to integrate the SmartPi into self-made applications and apps.
Application examples for the SmartPi: