[Tinyos-help] light and humidity measurement

[CHEUNG SAM]

Hi,

I use TmoteSky sensor to get the temperature, humidity and light intensity.

I find that the reading of humidity is lower that the actual environment.
I am not sure the light reading(TSR) of light is correct or not.
I use this formula to convert the sensor data.

Humidity: -4+0.0405*So+(-2.8*10^-6)*So*So
So is raw data
Sensor reading: 52.5% (converted)
Sensor reading: about 1500 (raw data)
Actual humidity: 69%

I put the sensor in front of the LCD monitor (I have open the lamp and the LCD monitor)

Light (TSR) : raw data/4096*1.5*10^4*0.769 
(modified by 0.769*1e5*I*10000 and Vsensor=raw data/4096*1.5 and I=Vsensor/100000 )

Sensor reading:0.281 Lx (converted)
Sensor reading:1 (raw data)
Is this the light intensity?

Can anyone help me? 

       
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