C - โปรแกรม โชว์ค่า ขึ้น LCD มันได้ผลที่ต้องการแต่มีบัคภาษาแปลกๆติดมาอีก1ตัว พี่ๆโปรแกรมเมอร์ช่วยชี้แนะทีครับ

#include <LiquidCrystal.h> ///คำสั่ง #include แล้วตามด้วยไฟล์ที่อยู่ใน Folder ชื่อ Libraries 
#include <Wire.h>

LiquidCrystal lcd(8, 9, 4, 5, 6, 7);

String inputstring = "";                  //a string to hold incoming data from the PC
String sensorstring = "";                 //a string to hold the data from the Atlas Scientific product
boolean input_stringcomplete = false;     //have we received all the data from the PC
boolean sensor_stringcomplete = false;    //have we received all the data from the Atlas Scientific
                                                              //product
                                                              
                                  /////////////////////////////////////////////////// 
                                  
 void setup(){ 
 lcd.begin(16, 2);              // start the library
 lcd.setCursor(0,0);   //set up the hardware
 Serial.begin(38400);                                  //set baud rate for the hardware serial port_0 to 38400
 Serial1.begin(38400);                                 //set baud rate for software serial port_3 to 38400
 inputstring.reserve(5);                               //set aside some bytes for receiving data from the PC
 sensorstring.reserve(30);                             //set aside some bytes for receiving data from Atlas Scientific
 }                                                     //product
 
                                   /////////////////////////////////////////////////
                                   
void serialEvent() {                                  //if the hardware serial port_0 receives
 char inchar = (char)Serial.read();                   //a char
 inputstring += inchar;                               //get the char we just received
 if(inchar == '\r') {input_stringcomplete = true;}    //add it to the inputString
 }                                                    //if the incoming character is a <CR>,
                                                      //set the flag 
                                                      
                                    ///////////////////////////////////////////////// 
                                    
void serialEvent1( ){                                 //if the hardware serial port_3 receives
 char inchar = (char)Serial1.read();                  //a char
 sensorstring += inchar;                              //get the char we just received
 if(inchar == '\r') {sensor_stringcomplete = true;}   //add it to the inputString
 }                                                    //if the incoming character is a <CR>,
                                                      //set the flag 

                                  //////////////////////////////////////////////
                                  
 void loop(){                                         //here we go...
 if (input_stringcomplete){                           //if a string from the PC has been received in its entierty
 Serial1.print(inputstring);

 inputstring = "";                                    //clear the string:
 input_stringcomplete = false;                        //reset the flag used to tell if we have received a completed 
 }                                                    //string from the PC 

 if (sensor_stringcomplete){                           //if a string from the Atlas Scientific product has been
 Serial.println(sensorstring);
 lcd.clear();
 
 lcd.print(sensorstring);                                   <<<<< เนี่ยอ้ะครับ[b][/b]
 

 sensorstring = "";                                    //send that string to to the PC's serial monitor
 sensor_stringcomplete = false;                       //clear the string:
 }                                                    //reset the flag used to tell if we have received a
 }                                                    //completed string from the Atlas Scientific product