How to set a press button to work once

Projects Programming
1

PLZ someone one help i want to make exucte commande else ony if you press the button once and return to nrml its a sytsem to read GAZ if it it detacte the gaz it run a commande untli you press the button to return to nrml mode

{

digitalWrite(redbulb,LOW);
digitalWrite(greenbulb, HIGH);
digitalWrite(buzzer,LOW);

lcd.setCursor(0, 0);
lcd.print("YOU ARE SAFE !");
lcd.setCursor(7, 1);
lcd.write(byte(1));

2

ok sorry

3

Based on the title, look at the state change detection example. The trick is to detect when the button becomes pressed, not when it us pressed.

4

plz someone help me i want to put a puch button that work only once when the degital anolge read it turn the lighe red and buzr hight but i want to stay like this until you press the button and it return to nrml mode

int analogSensor = analogRead(smokeA0);
while (var < 101) {
delay(30);

static byte percent = 0;

draw_progressbar(percent);

if (++percent == 101) {
lcd.clear();
}

var++;

}

if(smokeA0 < sensorThres)

{
digitalWrite(redbulb, HIGH);
digitalWrite(greenbulb, LOW);
digitalWrite(buzzer,HIGH);

lcd.begin(16, 2);
lcd.setCursor(0, 0);
lcd.print("danger !!! gaz");
lcd.setCursor(15, 0);
lcd.write(byte(0));

lcd.setCursor(0, 1);
lcd.print("");

Serial.println("AT+CMGF=1"); //Sets the GSM Module in Text Mode
delay(1000); // Delay of 1 second
Serial.println("AT+CMGS="+"\r"); // Replace x with mobile number
Serial.println("Alerte GAZ");// The SMS text you want to send
Serial.println((char)26);// ASCII code of CTRL+Z for saying the end of sms to the module
Serial.println("ATD+ +;");

delay(50);
}

else

{
digitalWrite(redbulb,LOW);
digitalWrite(greenbulb, HIGH);
digitalWrite(buzzer,LOW);

lcd.setCursor(0, 0);
lcd.print("YOU ARE SAFE !");
lcd.setCursor(7, 1);
lcd.write(byte(1));

delay(50);
}
}

5

Talk to this guy, but do it quick before he gets a forum timeout.

6

red1288D

TOPIC MERGED.

Could you take a few moments to Learn How To Use The Forum.
It will help you get the best out of the forum.

Continued cross posting could result in a time out from the forum.

Bob.

7

yes thnaks sorry about that