Mathematical operation

[mihaium]

Hello.
I'm testing the Power meter with Arduino and AC721 (current sensor) and I would need to
create an event that changes me consumption as the total consumtions exceeds a certain
value.
For example : the ' photovoltaic system produces 3 kW / h and my total consumption of 3.7 kW / h ( 1kW / h kitchen , 1 kw / h bathroom, 1 kw / h bedroom and 0.7 kW / h other consumption ) .
*My event is to make the sum of consumption and if the total is larger than it produces photovoltaic should begin to detach consumption ( with a certain priority ) until consumption are smaller production . In my example, I first off the other consumption . If consumption is anchored larger or equal to the production I detach a part of the consumption of the bathroom. If consumption is smaller then everything ok . If they are still larger than or equal with the production then I detach a part of the consumption of the bedroom ......

How can I do the math?

Thanks,
Marian

[enigmatheatre]

Hello.
I'm testing the Power meter with Arduino and AC721 (current sensor) and I would need to
create an event that changes me consumption as the total consumtions exceeds a certain
value.
For example : the ' photovoltaic system produces 3 kW / h and my total consumption of 3.7 kW / h ( 1kW / h kitchen , 1 kw / h bathroom, 1 kw / h bedroom and 0.7 kW / h other consumption ) .
*My event is to make the sum of consumption and if the total is larger than it produces photovoltaic should begin to detach consumption ( with a certain priority ) until consumption are smaller production . In my example, I first off the other consumption . If consumption is anchored larger or equal to the production I detach a part of the consumption of the bathroom. If consumption is smaller then everything ok . If they are still larger than or equal with the production then I detach a part of the consumption of the bedroom ......

How can I do the math?

Thanks,
Marian

Hi Marian.

I would suggest that you make a virtual device for displaying the totals then have an event that runs a script and calculates the values every time the input value changes. This way you can do any maths that you want on the value.

Greig.

[mihaium]

thanks for your opinion.
For the moment, i don't know how.
But....


Thanks again

[Daggy67]

did you have any luck figuring out how to do this. The maths function will give strange values when saved within the plugin, I have had no luck with it for analog values. Can anyone post an example to get started. I really want to use this feature, but can't get started. I need a proper value to display and then have movable set points to trigger events .

[enigmatheatre]

did you have any luck figuring out how to do this. The maths function will give strange values when saved within the plugin, I have had no luck with it for analog values. Can anyone post an example to get started. I really want to use this feature, but can't get started. I need a proper value to display and then have movable set points to trigger events .

Can you post what you would like from it and I will tell you how as there are lots of ways to calc the values.

The easiest way is to create a virtual device in homeseer then when the Arduino device changes value run a script to calc the value and update the virtual device. This way you also have both values.

Something like this should do.

Sub Main

End Sub

    Sub SetParam(ByVal Parm As String)

        Dim ArduinoDevice As Integer = 1234
        Dim VirtualDevice As Integer = 5678
        Dim CalcValue As Integer = 0

        CalcValue = hs.DeviceValue(ArduinoDevice) * 50 / 3


        hs.SetDeviceValueByRef(VirtualDevice, CalcValue, True)
        hs.WriteLog("Arduino", "Value Calculated =  " & CalcValue)

    End Sub 

[mihaium]

Thanks for your help.