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| // For arduino pro micro Use FreqMeasure from here: https://github.com/AndreyMitsyk/FreqMeasure | |
| #include <FreqMeasure.h> | |
| // System variables | |
| int buttonState = 0; | |
| int frequency = 0; | |
| double sum = 0; | |
| int count = 0; | |
| long buttonTimer = 0; | |
| boolean buttonActive = false; | |
| boolean longPressActive = false; | |
| // Initial sound state | |
| bool soundSwitch = true; | |
| // Initial calibration | |
| int balance = 9243; | |
| // Sensetive (should be >= 1) | |
| int sens = 2; | |
| // Button long press time | |
| long longPressTime = 1000; | |
| // 4 - input generator pin for Arduino Pro micro, 8 - for other versions | |
| const int soundPin = 6; | |
| const int ledPin = 10; | |
| const int pushButton = 9; | |
| void setup() { | |
| // Button | |
| pinMode(pushButton, INPUT); | |
| // Buzer | |
| pinMode(soundPin, OUTPUT); | |
| // Led | |
| pinMode(ledPin, OUTPUT); | |
| Serial.begin(9600); | |
| FreqMeasure.begin(); | |
| } | |
| void loop() { | |
| if (FreqMeasure.available()) { | |
| sum = sum + FreqMeasure.read(); | |
| count = count + 1; | |
| if (count > 30) { | |
| frequency = FreqMeasure.countToFrequency(sum / count); | |
| Serial.println(frequency); | |
| sum = 0; | |
| count = 0; | |
| } | |
| } | |
| buttonState = digitalRead(pushButton); | |
| if (buttonState == HIGH) { | |
| if (!buttonActive) { | |
| buttonActive = true; | |
| buttonTimer = millis(); | |
| } | |
| if ((millis() - buttonTimer > longPressTime) && !longPressActive) { | |
| longPressActive = true; | |
| soundSwitch = !soundSwitch; | |
| } | |
| balance = frequency; | |
| Serial.println("button"); | |
| } else { | |
| if (buttonActive) { | |
| if (longPressActive) { | |
| longPressActive = false; | |
| } | |
| buttonActive = false; | |
| } | |
| } | |
| if (abs(frequency - balance) <= sens) { | |
| noTone(soundPin); | |
| digitalWrite(ledPin, false); | |
| // Auto-balance | |
| balance = frequency; | |
| } | |
| else if (frequency > balance) { | |
| if (soundSwitch) { | |
| tone(soundPin, 900); | |
| } | |
| digitalWrite(ledPin, true); | |
| } | |
| else if (frequency < balance) { | |
| if (soundSwitch) { | |
| tone(soundPin, 200); | |
| } | |
| digitalWrite(ledPin, true); | |
| } | |
| } |
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