bluetooth - SoftwareSerial issues. Only when on power jack -

my code:

#include <softwareserial.h> softwareserial bluetooth(2,3); // output int redpin = 6;   // red led,  int grnpin = 11;  // green led, int blupin = 5;  // blue led,   // color arrays int black[3]  = { 0, 0, 0 }; int white[3]  = { 100, 100, 100 }; int red[3]    = { 100, 0, 0 }; int green[3]  = { 0, 100, 0 }; int blue[3]   = { 0, 0, 100 }; int yellow[3] = { 40, 95, 0 }; int dimwhite[3] = { 30, 30, 30 }; // etc.  // set initial color int redval = black[0]; int grnval = black[1];  int bluval = black[2];  int wait = 10;      // 10ms internal crossfade delay; increase slower fades int hold = 0;       // optional hold when color complete, before next crossfade int r = 0; int g = 0; int b = 0; char mode = '\0'; // initialize color variables int prevr = redval; int prevg = grnval; int prevb = bluval;  // set led outputs void setup() {   pinmode(redpin, output);   // sets pins output   pinmode(grnpin, output);      pinmode(blupin, output);    serial.begin(9600);  delay(1000);  bluetooth.begin(115200);  delay(100);  bluetooth.print("$$$");  delay(100);  bluetooth.println("u,9600,n");  bluetooth.begin(9600);  delay(100);  analogwrite(redpin, 0);   analogwrite(grnpin, 0);        analogwrite(blupin, 0);   serial.println("bluetooth initiated."); }  void printhex() {   serial.print(r, hex);   serial.print(g, hex);   serial.println(b, hex);   bluetooth.print(r, hex);   bluetooth.print(g, hex);   bluetooth.println(b, hex); }  // main program: list order of crossfades void loop() {   //read bluetooth , write usb serial   while(bluetooth.available())   {     if(mode == '\0') {       mode = (char)bluetooth.read();     }     if(mode == 'c'){       int r1 = bluetooth.parseint();       int g1 = bluetooth.parseint();       int b1 = bluetooth.parseint();       if (bluetooth.read() == '\n') {         if(r1 != r || g1 != g || b1 != b) {           r = r1;           g = g1;           b = b1;           analogwrite(redpin, r);           analogwrite(grnpin, g);                 analogwrite(blupin, b);            printhex();           mode = '\0';         } else {           printhex();           mode = '\0';         }       }   } else if(mode == 'p') {     if (bluetooth.read() == '\n') {       printhex();       mode = '\0';     }   } }    //read usb serial bluetooth   if(serial.available())   {     char tosend = (char)serial.read();     bluetooth.print(tosend);   } } 

if run code, works great. until plug power source , nothing else.

if plug power source, program doesn't start (no bluetooth response). if plug usb , power or usb only, program works. if unplug usb after plugging usb , power source program still works! have tried debugging as can, don't know error is. power supply rated @ 12v 2 amps light led strips.

update: found out if press reset button after power on starts work. there way automatically reset arduino on startup???

i think using arduino leonardo.

try @ beginning of setup:

while(!serial){} while(!bluetooth){} 

the arduino leonardo prepare serial port after while , may cause problems.