Reading such low values gives you almost gives you no resolution and no possibility to see a red light.
Which sensor are you using, do you have a link to a data sheet and perhaps a schematic how it's connected in your project ?
Reading such low values gives you almost gives you no resolution and no possibility to see a red light.
Which sensor are you using, do you have a link to a data sheet and perhaps a schematic how it's connected in your project ?