Wireless Alarm

i trying create a wireless alarm system using 2 arduinos , 2 xbees. want arlam on when button not pressed , off when is.

my router code is:

const int buttonpin = 2;   

int buttonstate = 0;

void setup() {
  serial.begin(9600);
  pinmode(buttonpin, output);
}

void loop(){
  buttonstate = digitalread(buttonpin);
  serial.println(buttonstate);
  delay(500);
}

and coordinator code is:

int ledpin =  2;
int buttonstate;

void setup() {
  serial.begin(9600);
  pinmode(ledpin, output);
}

void loop(){
  if (serial.available() > 0)
  {
    while(serial.available()>0) {buttonstate=serial.write(serial.read());}
    if (buttonstate == low) {digitalwrite(ledpin, low);}
    else {digitalwrite(ledpin, high);}
  }
}


....
the coordinator receives signals router alarm doesn't turn off when button pushed.

oh start...


first, when posting code, use code tags; makes easier read. speaking of easier read, there should be statement per line, none of crap:

code: [select]

while(serial.available()>0) {buttonstate=serial.write(serial.read());}
   if (buttonstate == low) {digitalwrite(ledpin, low);}

it should more this:

code: [select]

while(serial.available()>0)
{
 buttonstate=serial.write(serial.read());
}

if (buttonstate == low)
{
 digitalwrite(ledpin, low);
}

that makes more readable. may not suit "style" of coding if prefer other way, you're asking others help, not yourself.

now actual issue you're having:

code: [select]

serial.println(buttonstate);

say buttonstate high (or 1). code tells send ascii 1 new line character, you'll sending 49 followed 10. neither of equal low (or 0). since want actual value, , don't want encode data in ascii, should using serial.write.

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