By reading different values from the sensor, we can detect if is it light , dark or a value between them. Another element that we are going to use on this experiment is Piezo Buzzer. So what is it ?

“When [you see] the fire from the sky … it is too late.” The team says its new sensor can be placed near tree trunks' bases and send a wireless signal to a nearby receiver if there is a ...

As the soil dries out, the sensor value rises; when it reaches 900, the LED will light and the buzzer will sound. The sketch first defines Arduino pin A0 so that it reads the moisture sensor value. It ...