Hi,
I just published on github (https://github.com/gtortone/MySensors-Efergy-e2) my last work about integration of Efergy e2 power meter with MySensors. The Efergy e2 electricity monitor (http://efergy.com/it/products/electricity-monitors/e2-classic) provides a sensor that wirelessly sends information about the amount of electricity you are using to the display monitor. The monitor converts this into kilowatt-hours.

This sketch use a JeeNode v5 (http://jeelabs.net/projects/hardware/wiki/JeeNode) equipped with 433/868 MHz RFM12B module (www.hoperf.com/upload/rf/RFM12B.pdf) configured in OOK mode to capture wireless data (on pin D3) and forward it through NRF24L01+ with MySensors library.

Comments and suggestions are very welcome !

Regards,
Gennaro

p.s. photos will be published soon !

Photo #1: Efergy E2 OOK signal decoded by Zeroplus logic analyzer

Photo #2: JeeNode module with RFM12B radio module

Photo #3: NRF24L01+ JeeNode shield pluggable on SPI header of JeeNode

Photo #4: Final result !

Photo #5: Detail of RFM12B Data pin routed to D3 in order to perform software OOK decoding

Photo #6: Efergy power meter display shows same value of software !

Photo #7: First data gathered by Home Assistant (https://home-assistant.io) on Raspberry PI 3

Some notes:

1. I'm using a RFM12B radio module tuned for 868Mhz equipped with 433 MHz antenna... but everything goes fine due to RFM12B has frequency tuning

2. I plan to do another setup using a simple 433 Mhz receiver or other Hoperf 433 Mhz receiver module (RFM12B are obsoleted modules)

Hi @korttoma,

I did not tested cheap 433 MHz modules yet... I will receive a couple of them next week !
anywai RFM12b is a great module that has interesting features like frequency tuning and adjustable gain...

If I will have updates on cheap modules I will update this thread !

@korttoma

Hi, I have these modules:
http://www.banggood.com/433Mhz-RF-Transmitter-With-Receiver-Kit-For-Arduino-ARM-MCU-Wireless-p-74102.html?rmmds=search

the range is only few centimeters... I will try to do some antenna tuning but I don't expect any significative improvement.

If you want to try with your RXB6 module the code is always the same, you have only to remove the configuration code lines related to RFM12b configuration;