An open-source wireless energy monitoring node
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emonTx Firmware Examples

Arduino compatible firmware examples (ATmega328) for emonTx Low power wireless energy-monitoring node.

Update: the offical firmware for latest version of emonTx V3 (as shipped via OpenEnergyMonitor online store) has been moved to a dedicated emonTx V3 repository

Part of the project

Purchase Hardware

emonTx V3 Resources:

emonTx V2 Resources:


The emonTx firmware is released under the GNU GPL V3 license

The documentation is subject to GNU Free Documentation License

The emonTx hardware designs follow the terms of the OSHW (Open-source hardware) Statement of Principles 1.0.