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Sample code: int currentValue; int maxValue; int minValue; unsigned long timer; int sampleSpan = 10; // Amount in milliseconds to sample data int volume; // this roughly goes from 0 to 700
void setup() { Serial.begin(9600); resetValues(); }
void loop() { currentValue = analogRead(A0);
if (currentValue < minValue) { minValue = currentValue; } if (currentValue > maxValue) { maxValue = currentValue; }
if (millis() - timer >= sampleSpan) { volume = maxValue - minValue;
Serial.println(volume);
resetValues(); } //delay(100); }
void resetValues() { maxValue = 0; minValue = 1024; timer = millis(); } |