^35 - The Light Level Sensor Port

This port is a read only value of the current lux level in two bytes.
This can be useful to make sure a task only executes above or below certain lux levels.

This only reports the calibrated value not a raw value recorded by the sensor.

Syntax

LDA ^35,x
Where x is the detector index you want a value for
LDA ^35,0 //The lux level low byte
LDA ^35,1 //The lux level high byte

^35 Lux subport mapping
SubPort	Response Type
^35,0	Filtered Lux Low
^35,1	Filtered Lux High
^35,2	Unfiltered Lux Low
^35,3	Unfiltered Lux High
^35,4	Filtered Raw Lux Low
^35,5	Filtered Raw Lux High
^35,6	Unfiltered Raw Lux Low
^35,7	Unfiltered Raw Lux High
^35,8*	Target Lux Level for Current Preset Low
^35,9*	Target Lux Level for Current Preset High

*Target lux level for current preset is a read/write value and can be edited unlike the other subports.

Example

Excerpt from the D3 Sensor Closed loop daylight holdoff switch task template included in System Builder.

#const ClosedLoopArea 8
#const DaylightSwitchLuxHI 0
#const DaylightSwitchLuxLO 200

Task1()
{
Name="Daylight Switch"
//Task is configured to start on motion and stop on no motion. Task stops itself when lights are switched on.
//Task reads lux port and calculates if lights should be set to preset 1 (on)
GetLux:
      LDA ^35,1      //Lux level Hi byte
      CMP #DaylightSwitchLuxHI
      BRZ HiByteEqual
      BCC TooBright  //Measured lux level higher than switch level
      BRA P1
 HiByteEqual:
      LDA ^35,0      //Lux level Lo byte
      CMP #DaylightSwitchLuxLO
      BCC TooBright  //Measured lux level higher than switch level
      BRA P1
TooBright:
      delay(2)
      BRA GetLux
P1:
      Preset(a=ClosedLoopArea,p=1,f=2)
      null
}