I'm moving forward with a project that has to be closed in a short time for a prototyping of a few hundred units.
An important part is the measurement of solar radiation. I decided to use the SI1133 and make the sum of IR, visible and UV. For the application I'm doing is perfect.
However I am studying more deeply the operation of the sensor and I am very confused. I think I got even more when I saw some online sw libs for it.
What are the ADC's settings and the conversion calculation of the channel readings to W/m2?
How can I relate to table 8.3 (datasheet)?
ADCCONFIG0 = 0x02; - IR
ADCCONFIG1 = 0x0D; - VISIBLE
ADCCONFIG2 = 0x18; - UV
I can not move forward from this point because I do not understand what kind of result the sensor will give me.
My strategy would be to get the direct values with the sensor without a lens (to be able to use the ratio of table 8.3) and use another sensor with a Teflon diffuser lens to calculate the lens attenuation.
The goal is to do something similar to a pyranometer.
Can anyone give me more infos? Some help? Is my thinking correct?
Links:
SI1133 datasheetAN968MBED_LIB SI1133Thank you.