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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

Due to large amounts of spam, we have been forced to disable anonymous editing and automatic account creation. Please request an account via the link in the upper right corner of this page. We'll do our best to approve your account within 24hrs. If you don't hear from us, or need rapid approval please email: info (AT)

Hardware Modules

Monitoring Nodes


emonTx V2

emonTx V3.2

emonTx V3.4

emonTx Arduino Shield


Temperature & Humidity

emonTH V1.4

emonTH V1.5

Base Stations:

Arduino Based



Raspberry Pi:

RFM12Pi V1

RFM12Pi V2

RFM69Pi V3



emonGLCD V2

Dev: Nucleo ST32103 ARM Dev Board - Ubuntu Linux

New site