Goertzel
========

Arduino Library implementation of the Goertzel algorithm



Example
-------

```cpp
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.



Arduino Library implementation of the Goertzel algorithm . 

goertzel-arduino

Arduino Library implementation of the Goertzel algorithm 

jjrosent

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goertzel-arduino

Goertzel

Example

Todo

Keywords

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