Light Level Averaging

Is this possible. I have a project using multisensor and touchscreen with logic and a dsi gateway. What I want to do is alter the level of a group in the dsi gateway from an average of the lux level of 2 multisensors. I have assigned group addresses to the multisensors in light level broadcasting. Am I assuming wrong that I can average these readings out in logic.

I have assigned sensor 1 group as LL1
Sensor 2 group as LL2

I want to average LL1 and LL2 and average these Lux readings out and get a result AVERAGELL which I would used to set conditions and light levels.


I keep trying to write the logic for this but keep getting errors in compile. Could anyone help with the code or is what I want to achieve even possible???

 

Hi remedy

I suggest you have a read through the following post first. It talks about doing light level harvesting from light level sensors. If you've got some specific questions after that then just ask.
http://www.cbusforums.com/forums/showthread.php?t=4702

 

Try this:

Code:

{ global variables }
AVERAGELL : real;

{ module }
AVERAGELL := (GetUnitParameter("Local", 1, ptLightLevel) + GetUnitParameter("Local", 2, ptLightLevel)) / 2;

Ideally, you should check that the light level data is valid before using it, so this would be better:

Code:

{ global variables }
AVERAGELL : real;

{ module }
if GetUnitParamStatus("Local", 1, ptLightLevel) and GetUnitParamStatus("Local", 2, ptLightLevel) then
  AVERAGELL := (GetUnitParameter("Local", 1, ptLightLevel) + GetUnitParameter("Local", 2, ptLightLevel)) / 2
else
  AVERAGELL := 0;