How to Use Grove Starter Kit Plus - Grove - Sound Sensor

The Sound sensor module is a simple microphone. Based on the amplifier LM358 and the electretmicrophone, it can be used to detect the sound strength of the environment.

Steps

• connect one side of the grove cable into the soundsensor
• connect the other side of the grove cable into A0 of the grove shield
• run the code given below
• open serial monitor (ctrl + shift + m) to view the output

Code

The Serial Monitor prints LOUD, LOUD when sound is detected Otherwise it Prints Quiet

int soundDetectedPin = A0; // Use Pin 10 as our Input
int soundDetectedVal = HIGH; // This is where we record our Sound Measurement
boolean bAlarm = false;
unsigned long lastSoundDetectTime; // Record the time that we measured a sound
int soundAlarmTime = 500; // Number of milli seconds to keep the sound alarm high
void setup ()
{
 Serial.begin(9600);  
 pinMode (soundDetectedPin, INPUT) ; // input from the Sound Detection Module
}
void loop ()
{
 soundDetectedVal = analogRead (soundDetectedPin) ; // read the sound alarm time  
 //Serial.println(soundDetectedVal);
 if (soundDetectedVal > 400) // If we hear a sound //change this value for increasing/decreasing sensitivity
 {
   lastSoundDetectTime = millis(); // record the time of the sound alarm
   // The following is so you don't scroll on the output screen
   if (!bAlarm){
     Serial.println("LOUD, LOUD");
     bAlarm = true;
   }
 }
 else
 {
   if( (millis()-lastSoundDetectTime) > soundAlarmTime  &&  bAlarm){
     Serial.println("quiet");
       bAlarm = false;
   }
 }
}