I've just installed an emonpi and am using the onboard emoncms installation.
In addition to the directly connected inputs, I also have a fronius data logger, which has been monitoring my PV array for some time. This is a web-enabled device that can serve up readings over ethernet when polled.
I've set up a crontab shell script on the emonpi to pass values from the fronius logger to the emoncms on the emonpi as a feed, so I can see the solar PV on my dashboard, which works well.
The trouble is that what I want here, I think, is an 'input' or 'node', rather than a 'feed'. I need to be able to do kWh accumulation and arithmetic between inputs, which are done in terms of inputs, rather than feeds when I use 'Add Process' on a node input. I'm still going up the learning curve with this kit.
I get the impression that the emoncms on the emonpi is a cut down version, and that the ability to add 'virtual' inputs is not there. Am I understanding this right? If so, is it possible to run a fuller version on the emonpi itself? Alternatively, could I fake readings from an unused physical node, or something?
I can see alternatives to what I'm doing: hosting the data elsewhere, or using a CV to monitor the solar instead of the existing data logger, but with my configuration getting the software on the emonpi to do it all would be most convenient.
Extra inputs for emoncms on an emonpi
Submitted by crispin on Thu, 08/10/2015 - 11:09I've just installed an emonpi and am using the onboard emoncms installation.
In addition to the directly connected inputs, I also have a fronius data logger, which has been monitoring my PV array for some time. This is a web-enabled device that can serve up readings over ethernet when polled.
I've set up a crontab shell script on the emonpi to pass values from the fronius logger to the emoncms on the emonpi as a feed, so I can see the solar PV on my dashboard, which works well.
The trouble is that what I want here, I think, is an 'input' or 'node', rather than a 'feed'. I need to be able to do kWh accumulation and arithmetic between inputs, which are done in terms of inputs, rather than feeds when I use 'Add Process' on a node input. I'm still going up the learning curve with this kit.
I get the impression that the emoncms on the emonpi is a cut down version, and that the ability to add 'virtual' inputs is not there. Am I understanding this right? If so, is it possible to run a fuller version on the emonpi itself? Alternatively, could I fake readings from an unused physical node, or something?
I can see alternatives to what I'm doing: hosting the data elsewhere, or using a CV to monitor the solar instead of the existing data logger, but with my configuration getting the software on the emonpi to do it all would be most convenient.
I would appreciate any suggestions.