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OpenEnergyMonitor is a project to develop open-source energy monitoring tools. These tools can be used to 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 for the various hardware and software modules of the OpenEnergyMonitor project. Please add, edit and improve content. See for main project website

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Hardware Modules

Monitoring Nodes


emonTx V2

emonTx V3

emonTx Arduino Shield


Temperature & Humidity


Base Stations:

Arduino Based



Raspberry Pi:

RFM12Pi V1

RFM12Pi V2



emonGLCD V2