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int btnStart=4; unsigned long cnt=5000; unsigned long times=0; int states=0; void setup() { Serial.begin(9600); pinMode(btnStart, INPUT); } void loop() { if (digitalRead(btnStart) && states==0) { states=1; times=millis(); } if (states==1) { if (millis()-times > cnt) { states=0; Serial.println("Alarm"); } else { Serial.println( (cnt-(millis()-times))/1000.0 ); } } } |
