goertzel-arduino
v0.1.0
Published
Arduino Library implementation of the Goertzel algorithm
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Goertzel
Arduino Library implementation of the Goertzel algorithm
Example
void loop()
{
goertzel.sample(sensorPin); //Will take n samples
float magnitude = goertzel.detect(); //check them for target_freq
if(magnitude>THRESHOLD) //if you're getting false hits or no hits adjust this
digitalWrite(led, HIGH); //if found, enable led
else
digitalWrite(led, LOW); //if not found, or lost, disable led
Serial.println(magnitude);
}
Todo
Look to replace floats for quicker running. More full featured DTMF tone detection example.