Hello all, I start saying that this is my first project with arduino and i'm not so good in electronic stuffs, but I'm trying to save my plants from dryness.
I bought this http://www.icstation.com/product_info.php?products_id=2416#.U3upsyjYGSo and i'm using the included library to handle it.
My big problem is how to handle the SQW pin to receive the interupt. My first idea was to wire it to ARDUINO, but in the datasheet i read the following:
"Active-Low Interrupt or Square-Wave Output. This open-drain pin requires an external pullup resistor connected to a supply at 5.5V or less"
What I have to do? Any suggestion?