Descartes and the senses

Descartes does not state that the senses have no value, only that understanding is the function of the mind rather than of the senses. It might be said that if one hopes to understand something (even a physical thing) it must be done by the mind rather than relying only on the senses. Descartes had a dream that he argued if he was dreaming or not. this particular dream seemed to be real to him. In his dream he was sitting by a lit fire and while sitting next to it he could feel the warmth brushing against him, which made him argue if his senses can allow him to feel the heat while he's dreaming how does he trust if its lit and warm when he's awake. Descartes sense perception relies on the mind more than the body. Senses are revealed by the mind. I agree it is my mind that gives me reason and knowledge to control my senses. I may see someone walking down the street with an umbrella. My mind says its raining or going to rain or the umbrella is to keep out the sun. It is my mind that is understanding not my senses. But I can smell rain, hear the rain and feel the rain without being out in the rain. My mind controls my senses. When I have a dream and feel like I am falling, my mind is reenacting something I had done before. As if, falling off a bicycle, but in my dream I am falling off a cliff. I believe Descartes' feeling the sense of warmth of the fire is the realization of being familiar with fire and the warmth you get. It is his minds understanding that created the fire and warmth.