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How to Make the Sky IR Sensors + UV ,Solar,Light ,
Soldering Db9 Female Plug
USB 2.0 to RS232 Serial Port DB9 9 Pin Male Converter Adapter Cable

If you have no serial port/or would prefer to use a USB slot
use a USB to DB9 / serial connector
The infrared sensor mainboard connects to your computer using a RS232 female plug, You need to make up a lead with a female plug, use a one wire cable this can be up to 45 m from  where you are going to install the infrared sensors. Solder a wire  to pin 2, and 3 ,5   to the  RS232 female plug the  RS 232  plug connects to your computer, think about where you are going to locate the  infrared sensor thay  need to be exposed to the sky, My sensors are located on a garage roof, which is approximately 45 metres away from my computer The second female RS 232 female plug is for programming.  This can be a short lead  you need to program and test the device indoors close to your computer