My LCD screen is giving weird characters (same for Serial monitor).

hey guys,

i'm using bluetooth arduino while , wanted add lcd project, did , when tried print characters in lcd saw weird characters , wasn't working, thought connected wrong, few days later re-connected tried example sketch lcd , yes working good.

now again when use bluetooth lcd screen giving random characters, in serial monitor. i'm lost , think i'm making big mistake...
i use guys!

sketch in attachments here:

code: [select]

#include <softwareserial.h>                 // bluetooth library
#include <liquidcrystal.h>
liquidcrystal lcd(12, 11, 10, 5, 4, 13);
int bluetoothtx = 2;
int bluetoothrx = 3;
int gled = 7;                   // led's added
int rled = 9;
int bled = 8;
int leesbt;                     // means readbluetooth
string readstring;
softwareserial bluetooth (bluetoothtx, bluetoothrx);


void setup() {
  pinmode(gled, output);
  pinmode(rled, output);
  pinmode(bled, output);
  serial.begin(9600);
  bluetooth.begin(9600);
  lcd.autoscroll();
  lcd.begin(16, 2);
  lcd.clear();
  lcd.print("welkom!");       // printing welcome
  delay(1000);

}

void loop() {
  while (bluetooth.available()) {
    leesbt = bluetooth.read();
    char c = bluetooth.read();              // when type in mobile phone bluetooth read , print on lcd
    readstring += c;
  }
  if (readstring.length() > 0 && readstring.length() <= 32) {         // if not more 32 characters (total characters lcd can have print it
    lcd.clear();
    serial.println(readstring);
    lcd.print(readstring);
    delay(1000);
  }
  else if (readstring.length() > 32) {        // if more 32 characters give error!
    lcd.clear();
    lcd.setcursor(1, 0);
    lcd.print("error teveel");
    lcd.setcursor(0, 1);
    lcd.print("tekst!");
    delay(1000);
  }
  if (leesbt == '1') {                      // part working fine..
    lcd.clear();
    serial.println("gled aan");
    digitalwrite(gled, high);
    bluetooth.print("1");
    delay(1000);
  }
  if (leesbt == '0') {
    lcd.clear();
    serial.println("gled uit");
    digitalwrite(gled, low);
    bluetooth.print("0");
    delay(1000);
  }
}

some characters serial monitor prints in when type things 'hello'.
http://imgur.com/a/uc66r

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