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A low power wireless energy monitoring node. It's designed to sense data from multiple CT current sensors, optically from a pulse-output utility meter and from multiple one-wire temperature sensors. It can be powered by 2 x AA batteries or 5V USB.

     
 emonTx PCB  emonTx inside  emonTx Outside

 

The emonTx is based on the Atmega328 8-bit micro-controller and is fully compatible with Arduino IDE. A 5V FTDI to USB cable is required for programming.

The design is based on the JeeNode. It's fully open-source and is designed for easy expandability and compatibility with JeeLabs plug-shields.

 

 

Amin Zayani's picture

3xAA batteries

Submitted by Amin Zayani on Mon, 13/02/2012 - 00:23.

 Hello,

I'm using 3xAA batteries to power my emonTx, I dont think it's a problem, or am I wrong?

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Andygodber's picture

Revisiting an invasive module?

Submitted by Andygodber on Sat, 04/02/2012 - 11:48.

With the stability of the Tx, GLCD etc, are there any plans to create a "semi" invasive module?

Might be worth combining your experiments from http://openenergymonitor.org/emon/node/27, inspired by Jao and Guo's Powerbox into a modern equivalent? I.e a safe socket, allowing appliances to be plugged in and measured (not necessarily controlled), and reported back to the Base.

 

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charls.lee6's picture

Tutus

Submitted by charls.lee6 on Sat, 04/02/2012 - 09:33.

Tutus

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Lya72's picture

emonTX assembled in the Shop

Submitted by Lya72 on Tue, 17/01/2012 - 13:16.

Hi,

 

Today, i was unable to find an assembled emonTX in the shop.

For the emonBase, the recommandation was to get a Nanode RFX.

 

I bought 2 Nanode RFX , one for the emonBase, one for the emonTX.

 

Am I right in my choice ?? 

 

Yann

 

 

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glyn.hudson's picture

Re: emonTx

Submitted by glyn.hudson on Tue, 17/01/2012 - 13:57.

We have not yet officially opened the openenergymonitor shop. We are working towards opening it soon. In the meantime please register your interst on the interest form.

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Lya72's picture

Shop already in activity

Submitted by Lya72 on Tue, 17/01/2012 - 15:06.

 Hi Glyn,

In this screen on the right, there is a link going to the shop!!

Is it a fake shop just for tests ??

My Paypal payment seems realistic !!

 

Yann

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glyn.hudson's picture

Re: Nanode shop

Submitted by glyn.hudson on Tue, 17/01/2012 - 17:45.

The link you can see is a twitter re-tweet from Ken Boak. The link is to his shop that sells the Nanode boards. The Nanode is an Arduino clone board with on-board Etherent, we use the NanodeRF as our emonBase (web-connected base station). We colaborate closly with Ken and I re-tweeted his link to help promote his shop, this is not the OpenEnergyMonitor shop. We will make a big announcment on the blog and twittter when we do lunch the OEM shop. Sorry for the confusion. 

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Andygodber's picture

Old Nanode5 firmware for CT, Voltage

Submitted by Andygodber on Mon, 16/01/2012 - 21:29.

Also, is there an old sketch for the Nanode5 knocking around, that receives and posts the data from a one (or two) channel TX, as well as apparent power, Vrms, Irms and PF, or do I need to get a NanodeRF? 

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glyn.hudson's picture

Re: Nanode5 Vs. NanodRF

Submitted by glyn.hudson on Mon, 16/01/2012 - 21:39.

Nanode5 (with JeeLabs RFM12B breakout board) is hardware identical to NanodeRF. Exactly the same sketches will run https://github.com/openenergymonitor/NanodeRF

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Larsjo's picture

JeeLib

Submitted by Larsjo on Tue, 10/01/2012 - 22:39.

 for Arduino ver 1, remember to read this:

Unpack the archive and rename the result to JeeLib.

Put it in the libraries folder in your Arduino sketches area.

you find the files here: https://github.com/jcw/jeelib (was getting a bit frustrated until i found out)

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