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Can the emon website send data to an arduino or control it?

Submitted by francopr on Mon, 18/04/2016 - 19:57

Hello everyone.

I have successfully sent data to the emon website and now I was wondering if the emon website can send data to the arduino or control it? For instance, change a temperature set point through the website or turn a relay on or off.

Does anybody knows if it possible to do?

Thank you.

 

Pedro

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baldockery's picture

Re: Can the emon website send data to an arduino or control it?

Submitted by baldockery on Mon, 18/04/2016 - 21:43.

I've been experimenting with this and, though it wouldn't use the Emoncms website specifically, remote control is possible with the OEM architecture. It goes something like this:

openHAB item on openHAB app --> openHAB server on your local emonHub/emonPi --> MMQT message to the node-RED server also running on your local emonHUB/emonPi. From node-RED you can send commands in a lot of really convenient ways to internet-of-things devices.

The latest emonHub release candidate actually sets up some of this to show you how to do it.

https://openenergymonitor.org/emon/node/12437

Here is an blog post from Glyn talking about the possibilities:

http://openenergymonitor.blogspot.com/2015/10/emonpi-nodered-and-mqtt.html

And this is an example of a relay that could be controlled by this architecture:

https://openenergymonitor.org/emon/modules/wifirelay

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