Hi All
New to Arduino and Emoncms. Beginner level of software knowledge, be gentle.
Am looking to replace a Flukso unit as I need more pulse inputs due to adding 2 more kWh meters, gas meter and water meter.
I have built the 12 input pulse counting dual Arduino unit as specified in Trystans post and have this reporting back to my Ubuntu server running Emoncms. Everything is working and numbers are being sent into the input and feed on my Emoncms server.
I am now looking at the actual data validity, bear in mind I'm newb at this and I don't understand whether what I have accomplished is accurate/valid. The core issue or concept I am having trouble getting my head around is the representation of the kWh pulse from the meters in Emoncms.
Emoncms appears to be setup for accepting data from devices that are providing a figure that corresponds to the instantaneous value of the parameter being monitored eg. Power would be Watts. This can then be accumulated over time to log consumption figures.
If you have a kWh meter you are already getting the accumulation value and of course you can then measure the time between pulses and calculate the instant power over that period.
How do you represent the pulse reading in Emoncms directly from the raw actual value without having to first convert this to a power figure (as occurs in the Arduino pulse counter code) which is then used to generate the kWh figure in Emoncms?
Or am I missing something/confused/off track/etc.... about how pulse counting and recording/display of this in Emoncms works?
cheers
Re: Electricity Meter Pulse Output
Hi,
If your energy meter outputs 1000 p/kWh then you can use the "Wh increments to kWh/d" process to get the daily energy usage in emoncms feed.
To validate the data you can write down your actual reading on the energy meter at 00:00 and do the same 24h later. Subtract the two values to get the actual daily energy usage. Now its easy to compare it to your data in the emoncms.
Perhaps you also need to set your correct timezone in emoncms settings.