Good morning, sir,
I would like to make a system to start and control a Device with only one push button and 2 LEDs.
Here’s what I want to do:
If we push the push button:
- 1st press: the system is switched on. (Red LED ON - Blue LED OFF) Display (" Device is started… Press Button to start the program " ).
- 2nd press: we start the program. (Red LED ON - Blue LED ON) Display (“Program is started … Press button to stop the program”)
- 3th press: we stop the program. (Red LED ON - Blue LED OFF) Display (“Program stopped”)
- 4th press : turns off the system. (Red LED OFF - Blue LED OFF).
// this constant won't change:
int button = 2;// the pin that the pushbutton is attached to
int redled = 13;// the pin that the Red LED is attached to
int blueled = 12;// the pin that the Blue LED is attached to
// Variables will change:
int buttonState = 0; // current state of the button
int lastButtonState = 0; // pevious state of the button
int DeviceState = 0; // current state of DEVICE
int redledState = 0; // current state of the Red LED
int blueledState = 0; // current state of the Blue LED
void setup() {
// initialize serial communication:
Serial.begin (9600);
// initialize the button pin as a input:
pinMode(button, INPUT);
// initialize the Red LED as an output:
pinMode(redled, OUTPUT);
// initialize the Blue LED as an output:
pinMode(blueled, OUTPUT);
}
void loop() {
// read the pushbutton input pin:
buttonState = digitalRead(button);
// compare the buttonState to its previous state
if (buttonState != lastButtonState) {
//if the button state is not 1
if (!buttonState) {
//and if Red LED State = 1
if (redledState)
//Switch to : Red LED = 0
redledState = 0;
else
// else Switch : RED LED = 1
redledState = 1;
Serial.println ("Device is started... Press Button to start the program");
}
// save the current state as the last state, for next time through the loop
lastButtonState = buttonState;
}
//display led status on serial communication
Serial.println (redledState);
// turn RED LED State:
digitalWrite(redled, redledState);
// Delay a little bit to avoid bouncing
delay(20);
}
/*********************** **************************/
Thank you for help.
Wiring of the system as an attachment.
Take a look at the StateChangeDetection example in the IDE as a starting point
You can get button press_count.
If ((count% 4) == 0) => the system is switched on.
If ((count% 4) == 1) => we start the program
If ((count% 4) == 2) => we stop the program.
If ((count% 4) == 3) => turns off the system.
See button get count and button control led tutorial
IoT_hobbyist:
You can get button press_count.
If ((count% 4) == 0) => the system is switched on.
If ((count% 4) == 1) => we start the program
If ((count% 4) == 2) => we stop the program.
If ((count% 4) == 3) => turns off the system.
I’ve made it work well… Thank you very much.
I would like to do now that if you press long time ( > 1000 & < 2000 ) milliseconds you turn on the device.
and if the device is switched on, pressing long time ( > 1000 & < 2000 ) turns the device off.
and if you press very long time ( > 10000 ) milliseconds it resets the device.
Thank you for help
// this constant won't change:
int button = 2;// the pin that the pushbutton is attached to
int redled = 13;// the pin that the Red LED is attached to
int blueled = 12;// the pin that the Blue LED is attached to
// Variables will change:
int buttonState = 0; // current state of the button
int lastButtonState = 0; // pevious state of the button
int DeviceState = 0; // current state of DEVICE
int redledState = 0; // current state of the Red LED
int blueledState = 0; // current state of the Blue LED
int buttonPushCounter = 0; // counter for the number of button presses
void setup() {
// initialize serial communication:
Serial.begin (9600);
// initialize the button pin as a input:
pinMode(button, INPUT);
// initialize the Red LED as an output:
pinMode(redled, OUTPUT);
// initialize the Blue LED as an output:
pinMode(blueled, OUTPUT);
}
void loop() {
// read the pushbutton input pin:
buttonState = digitalRead(button);
// compare the buttonState to its previous state
if (buttonState != lastButtonState) {
// if the state has changed, increment the counter
if (buttonState == HIGH) {
// if the current state is HIGH then the button went from off to on:
buttonPushCounter++;
}
}
// save the current state as the last state, for next time through the loop
lastButtonState = buttonState;
//turns on the Device four button pushes by checking the modulo of the button push counter.
// first press
if (buttonPushCounter % 4 == 1) {
digitalWrite(redled, HIGH);
digitalWrite(blueled, LOW);
Serial.println("Device is started... Press Button to start the program");
}
// Second Press
if (buttonPushCounter % 4 == 2) {
digitalWrite(redled, HIGH);
digitalWrite(blueled, HIGH);
Serial.println("Program is started ... Press button to stop the program");
}
// Third Press
if (buttonPushCounter % 4 == 3) {
digitalWrite(redled, HIGH);
digitalWrite(blueled, LOW);
Serial.println("Program stopped");
}
// Fourth Press
if (buttonPushCounter % 4 == 4) {
digitalWrite(redled, LOW);
digitalWrite(blueled, LOW);
}
Serial.print(buttonPushCounter %4);
Serial.println(" th Press");
// Delay a little bit to avoid bouncing
delay(10);
}
TomGeorge:
Hi,
OPs picture;
Tom... 
Thank you
I did it on: https://www.tinkercad.com/
it also allows me to simulate the UNO without having to plug in ...
