CODEWITHSUNDEEP
c#arduino
Sebastian
Sebastian

Reputation: 1

Arduino - switch off all LEDs but keep one on automation

I need to set all LEDs to LOW except the one I want to be on HIGH. Currently, I have to send a specific request to all LEDs to ensure that the previous LED will be set on LOW. If i apply this logic to a lot of LEDs the code will be quite long.

Is there a way to say

Question

This code will switch on led.

if (readString.indexOf("?wall01_02") > 0) {
        digitalWrite(led, HIGH);
        digitalWrite(led1, LOW);
        digitalWrite(led2, LOW);
        digitalWrite(led3, LOW);

the next time I'm going to send a request to led1, but I also have to switch off the previous LED led.

 if (readString.indexOf("?wall01_01") > 0) {
            digitalWrite(led, LOW);
            digitalWrite(led1, HIGH);
            digitalWrite(led2, LOW);
            digitalWrite(led3, LOW);

Upvotes: 0

Views: 193

Answers (1)

EAX
EAX

Reputation: 111

I can't write a comment.

Why not an array of int, something like this:

#define ledArray 4
int ledPins[ledArray] = {1, 3, 7, 14};

if(readString.indexOf("?wall01_02") > 0) {
    lightsOff(led);
}

if(readString.indexOf("?wall01_01") > 0) {
    lightsOff(led1);
}

void lightsOff(int led) {
    int i;
    for(i = 0; i < ledArray; ++i) {
        digitalWrite(ledPins[i], (ledPins[i] != led) ? LOW : HIGH);
    }
}

Upvotes: 2

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