sending a word

hi 

so i've connected bluetooth module arduino , phone , i'm controlling 3 leds sending if want turn red led on , b if want turn orange 1 .. etc.

but wand send word such red turn red 1 can't figure out how .. please  :~

and here's code :

int led1 = 8;
int led2 = 7;
int led3 = 4;
char state = 0;

void setup () {
  serial.begin (9600);
  pinmode(led1, output);
  pinmode(led2, output);
  pinmode(led3, output);
} 

void loop () {
  if (serial.available () > 0) {
    state = serial.read ();
  } 
   if (state == 'a') {
     digitalwrite (led1, high); 
     digitalwrite (led2, low); 
     digitalwrite (led3, low);
    }
    if (state == 'b') {
     digitalwrite (led1, low); 
     digitalwrite (led2, high); 
     digitalwrite (led3, low);
    }
    if (state == 'c') {
     digitalwrite (led1, low); 
     digitalwrite (led2, low); 
     digitalwrite (led3, high);
    }   
}   

arduino can read 1 character @ time, need array can store characters come in:

code: [select]

char mybuffer[10+1]; // can receive 10 characters plus null terminator

you need variable keeps track of in array next available slot is:

code: [select]

int myindex = 0;

every time read byte:

code: [select]

inbyte = serial.read();

you check if matches terminating character. can of choosing, common tactic have serial monitor send newline, , use that:

code: [select]

if (inbyte == '\n')

if true, can use strcmp() see if matches string:

code: [select]

if (strcmp(mybuffer, "red") == 0)

and take action accordingly. should clear buffer:

code: [select]

mybuffer[0] = '\0';
myindex = 0;

if not match new line character, stick buffer, increment index , null terminate array (required use string functions strcmp()):

code: [select]

mybuffer[myindex] = inbyte; // put byte in buffer
myindex++; // move next index
mybuffer[myindex] = '\0'; // , null terminate array

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