Turning switches off

[samfranklin]

Hi!

Sorry to keep asking so many questions - I'm an arduino noob

I tried what you suggested but the serial monitor still shows that it is sending repeated C02/C01 lines.

int val = 0;int inputPin = 2;
int valOld = 0;


void setup()
{
pinMode(inputPin, INPUT);
Serial.begin(9600);
digitalWrite(inputPin, HIGH);
}


void loop() {
val = digitalRead(inputPin);
if (val != valOld); {
if (val == HIGH) { Serial.println("C02"); } else { Serial.println("C01"); };
valOld = val;
}
}

[JMeller]

That's ok. I encourage it because we all had to start somewhere.

Usually when I have difficulty, I serialPrint the variables for troubleshooting; similar to how you are using C01/C02.
Serial.println("val");
Serial.println("valOld")
delay(750);

[samfranklin]

I did it!

For some reason it wouldn't work as just an 'if' statement so I changed it to an 'if{}else' statement and it worked.

For anybody that may be experiencing similar problems:

int val = 0;int inputPin = 2;
int valOld = 0;


void setup()
{
pinMode(inputPin, INPUT);
Serial.begin(9600);
digitalWrite(inputPin, HIGH);
}


void loop() {
val = digitalRead(inputPin);

if (val == valOld) {
} else {
if (val == HIGH) { Serial.println("C02"); } else { Serial.println("C01"); };
valOld = val;
}
delay(500);
}

Edit: I added a delay as without it any rapid switch changes caused problems.

[JMeller]

Awesome. It is strange you had to use an else statement to make it work.

int val = 0;int inputPin = 2;
int valOld = 0;


void setup()
{
pinMode(inputPin, INPUT);
Serial.begin(9600);
digitalWrite(inputPin, HIGH);
}

void loop() {
val = digitalRead(inputPin);

if (val != valOld) {
if (val == HIGH) { Serial.println("C02"); } else { Serial.println("C01"); };

}
valOld = val;  //moved outside of if/then statement
delay(500);
}

As for the rapid switch changes causing problems: Are you using a 10K pull-down resistor when the switch is in the off/open position? I also assume you are using a ~10K pull-up for the on/closed position of the switch.

[karan_maverick]

Hi,
I am new to arduino and Link2Fs, The above code is for a single switch, Could anyone please help me with the code if i wanted to have multiple switches.
Thanks,

[BushPilotWannabe]

Welcome. Happy to see some beginner Arduino, Link2FS activity.

EDIT

My apologies to karen_maverick. My original post has been expanded and moved into a new thead. http://www.mycockpit.org/forums/show...105#post171105

[karan_maverick]

Thanks for the quick reply.