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OpenEnergyMonitor is a project to develop open-source energy monitoring tools that help us relate to our use of energy, our energy systems and the challenge of sustainable energy.

Technical Documentation

This wiki is for up-to-date technical documentation of the various hardware and software modules that comprise the OpenEnergyMonitor project. Please add, edit and improve content. See for main project website

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Hardware Modules

Sensor Nodes


emonTx V2

emonTx V3.2

emonTx V3.4

emonTx Arduino Shield


Temperature & Humidity

emonTH V1.4

emonTH V1.5

emonTH V2.0

Base Stations:

Raspberry Pi:

RFM12Pi V1

RFM12Pi V2

RFM69Pi V3

Arduino Based


OpenKontrolGateway (archive)

Control Nodes:


MQTT WiFi Relay


Nucleo ST32103 ARM Dev Board - Ubuntu Linux