SmartPi 3.0 / 3.1 - nD-enerserve GmbH

Turn your Raspberry Pi into a smart meter

SmartPi

The SmartPi 3.0 expansion module extends the Raspberry Pi

by interfaces for voltage measurement and non-contact current

measurement and thus becomes a fully-fledged smart meter that

controls and records power consumption and power generation

and makes it available in the network or the Internet.

With SmartPi 3.0, the power consumption data can be conveniently

recorded, evaluated and used as a basis for energy-saving measures.

With SmartPi you reduce energy costs in your company and at home.

The current is measured contactlessly via current terminals in order to

measure currents up to 100A in the standard version. The jumpers can

be easily reconnected to any cable conversion converter with a secondary

current of 1A. This allows currents up to 700A and more to be measured.

The SmartPi 3.0 has 3 inputs for current measurement (L1,L2,L3)

and three inputs for voltage measurement. This allows measurements

on all three phases and even the neutral conductor. The SmartPi 3.0

and Raspberry Pi can be powered via the voltage input. An external

power supply is not required.

If the voltage measurement is connected, the direction

of energy flow can be determined and the SmartPi is

a fully-fledged bidirectional SmartMeter.

SmartPi 3.0 measures all important data:

Current
Voltage
Power
- Active power
- Reactive power
- Apparent power
Energy consumption
Energy production
Power consumption
Power production
Frequency
Cos Phi

Buy SmartPi

Web interface, database, MQTT, REST and node-red control

Open Source Smart Meter 3.0

The measurement data are read out every second and stored

in an SQLite database every minute. Optionally, it can also be

stored in an external Prometheus database.

The built-in web server of the SmartPi provides the measurement data

graphically processed conveniently via browser or tablet / smartphone.

The SmartPi has an MQTT and REST interface for integration into other

energy management systems. In addition, CSV files of the energy

measurement data can be stored on other servers via FTP.

Separate node-red modules allow reading out the current measured

valuesand integration into flows. For example, you can have an e-mail

sent to you if services are exceeded or not reached. There is also a

separate node red module for the relay. The optional evaluation

via the nD-enerserve energy cloud rounds off the package.

Screenshot Node-Red Integration — Proprietary Node Red modules enable integration into more advanced control processes

The measurement data are read out every second and stored

in an SQLite database every minute. Optionally, it can also be

stored in an external Prometheus database.

The SmartPi software is written in Go, open source and can be found on

Github (https://github.com/nDenerserve/SmartPi).

Ideal to use SmartPi in your own projects or to extend the range of functions.

Examples that can be built with the SmartPi:

Energy monitor via network and Internet
Mains frequency monitoring
Mains voltage monitoring
Alarms at power consumers
Alarms for increased consumption
Integration into energy management systems
Cost control

All interfaces to the Raspberry Pi are galvanically isolated and ensure

maximum safety. The SmartPi 2.0 is equipped with a battery-buffered RTC

(Real Time Clock) for reliable operation of the SmartPi 2.0 even without a

network connection. The entire system is powered from the measuring

voltage via the integrated power supply unit. This eliminates unreliable

handling of power supplies on Micro_USB sockets. The housing has a

mounting bracket on the back for mounting the SmartPi 3.0 on the DIN rail.

The module is compatible with all Raspberry Pi models from version B+ 1.2

and can be purchased as a single module, kit or fully assembled device.

The SmartPi has an MQTT and REST interface for integration into other

energy management systems. In addition, CSV files of the energy

measurement data can be stored on other servers via FTP.

Separate node-red modules allow reading out the current measured

values and integration into flows.For example, you can have an e-mail

sent to you if services are exceeded or not reached. There is also a

separate node red module for the relay.

The optional evaluation via the nD-enerserve

energy cloud rounds off the package.

Softwarefeatures

Reads current, voltage, power and many other data every second.
Store values in the database every minute
MQTT support
Prometheus support (not yet documented)
Node-Red Integration
CSV FTP upload
Web interface for display and configuration
UMTS support

Features/Specifications:

Raspberry Pi compatible connector
Raspberry Pi compatible size
Galvanic isolation
Integrated power supply from the voltage measuring path
via stable terminals (optionally 2A DC current)
Open source drivers and API
Current measurement on 3-phase
Connection for cable converter with a secondary output of 50mA and 1A
Screw terminals for connecting the current and voltage measurement
Compatibility with all Raspberry Pi models
buffered RTC (the Raspberry Pi continues to run stably)
even without an Internet connection after a power failure)
Additional status LED
High-quality housing with top-hat rail mounting