Controlling two devices independently(ish)

Question

Hi,

I'm looking for a way to control two devices. One is a light and based of the proximity it goes on or off....I have that part working now. The other device needs to be turn on when the light turns on the first time, but then needs run for 10 mins after no matter if the light is on or off.

void loop(void){

if dist1 < onMin){

if dist1 > onMax)) {

digitalWrite(lightPin1, HIGH);

digitalWrite(alarmPin2, HIGH);

}

if dist1 < onMax )){

digitalWrite(lightPin1, LOW);

}

Thanks

I'm terribly new to this so pardon my clunky coding.

Former Member · Accepted Answer

HI there,

my first advice would be to use a more comprehensive statement in the if-else condition

e.g if ( x<a || x>b) "|| means OR you can do it with alt-gr+6 on the top of keyboard"

for the 10mn cooldown i suppose you don't want that your program to be broken on sleep time so you can consider

using the millis() function that'll not break it using another if-else statement.

here is a link to be more comprehensive http://arduino.cc/en/Reference/millis and you could also take a look

at the blink without using delay tutorials to see it in action http://arduino.cc/en/Tutorial/BlinkWithoutDelay

On the other devices you can start it by using a variable containing current state of the device that will be change on the first device at the light on

e.g

digitalWrite(ledPin1, HIGH); // the first one on

if(secondLedState == false){ // check if variable of second led has been used

secondLedState = ~secondLedState; // change state of second led

}

then change the variable as second devices has been triggered.

if(secondLedState == true){

secondLedState = ~secondLedState;

}

etc.....

Good luck