Arduino And Keypad Based Timer

Code :-

//Prateek //www.prateeks.in #include <Arduino.h> #include <TM1637Display.h> #define key1 6 #define key2 7 #define key3 9 #define key4 8 #define CLK 4 #define DIO 5 int Buzzer = 12; int ledPin = 11; #define TEST_DELAY 2000 TM1637Display display(CLK, DIO); void setup() { Serial.begin(9600); pinMode(key1, INPUT_PULLUP);// set pin as input pinMode(key2, INPUT_PULLUP);// set pin as input pinMode(key3, INPUT_PULLUP);// set pin as input pinMode(key4, INPUT_PULLUP);// set pin as input pinMode(ledPin, OUTPUT); pinMode(Buzzer, OUTPUT); } void loop() { int key1S = digitalRead(key1);// read if key1 is pressed int key2S = digitalRead(key2);// read if key1 is pressed int key3S = digitalRead(key3);// read if key1 is pressed int key4S = digitalRead(key4);// read if key1 is pressed // Code written for Robojax.com video Tutorial if (!key1S) { digitalWrite(ledPin, LOW); digitalWrite(Buzzer, HIGH); Serial.println("key 1 is pressed"); display.setBrightness(0x0f); uint8_t data[] = { 0x0, 0x0, 0x0, 0x0}; display.setSegments(data); for (int i = 10; i >= 0; i--) { display.showNumberDec(i); delay(1000); } digitalWrite(ledPin, HIGH); delay(3000); digitalWrite(ledPin, LOW); digitalWrite(Buzzer, LOW); display.clear(); } if (!key2S) { digitalWrite(ledPin, LOW); digitalWrite(Buzzer, HIGH); Serial.println("key 2 is pressed"); display.setBrightness(0x0f); uint8_t data[] = { 0x0, 0x0, 0x0, 0x0}; display.setSegments(data); for (int i = 20; i >= 0; i--) { display.showNumberDec(i); delay(1000); } digitalWrite(ledPin, HIGH); delay(3000); digitalWrite(ledPin, LOW); digitalWrite(Buzzer, LOW); display.clear(); } if (!key3S) { digitalWrite(ledPin, LOW); digitalWrite(Buzzer, HIGH); Serial.println("key 3 is pressed"); display.setBrightness(0x0f); uint8_t data[] = { 0x0, 0x0, 0x0, 0x0}; display.setSegments(data); for (int i = 30; i >= 0; i--) { display.showNumberDec(i); delay(1000); } digitalWrite(ledPin, HIGH); delay(3000); digitalWrite(ledPin, LOW); digitalWrite(Buzzer, LOW); display.clear(); } if (!key4S) { digitalWrite(ledPin, LOW); digitalWrite(Buzzer, HIGH); Serial.println("key 4 is pressed"); display.setBrightness(0x0f); uint8_t data[] = { 0x0, 0x0, 0x0, 0x0}; display.setSegments(data); for (int i = 40; i >= 0; i--) { display.showNumberDec(i); delay(1000); } digitalWrite(ledPin, HIGH); delay(3000); digitalWrite(ledPin, LOW); digitalWrite(Buzzer, LOW); display.clear(); } }