arduino_1x16 LCD_BT

// 引用 LiquidCrystal Library

#include <SoftwareSerial.h>   // 引用程式庫

#include <LiquidCrystal.h>

// LCD 接腳:  rs, enable, d4, d5, d6, d7 

// 對應到 Arduino 接腳:  12,     11,  5,  4,  3,  2

LiquidCrystal lcd(12, 11,5, 4, 3, 2);

String strall="Bluetooth transmission";

String LCD_clear="                        ";

SoftwareSerial BT(8, 9); // 接收腳, 傳送腳

char val;  // 儲存接收資料的變數

void setup() {

lcd.begin(8, 2);//宣告LED 16X1

 Serial.begin(115200);// Serial.begin(9600);

 Serial.setTimeout(5);

    Serial.println("Bluetooth transmission started");

    BT.begin(38400);

   BT.setTimeout(5);

     strall="Bluetooth started";  LCMshow(); 

}

void loop() {

      while (BT.available()) {  //com7 pc  keyin

       lcd.clear();

      strall=BT.readString();      LCMshow(); 

      Serial.println(strall);//BT.readString());

      }

     while (Serial.available()) {  //com4 keyin

      lcd.clear();

     strall=Serial.readString();     LCMshow(); 

     BT.println(strall);//Serial.readString());

    }

}

int LCMshow()

{

lcd.setCursor(0, 0);//第一行游標

lcd.print(strall.substring(0,8));

lcd.setCursor(0,1);//第二行游標

lcd.print(strall.substring(8,15));

  }  

 

int LCMstrrun()

{

lcd.setCursor(0, 0);//第一行游標

lcd.print("        ");

for (int i=0; i<strall.length(); i++)

  {   lcd.print(strall.charAt(i));     }

lcd.setCursor(0, 0);//第一行游標

lcd.setCursor(0,1);//第二行游標

//lcd.print(strall.length());

  for (int i=0; i<8 i="" nbsp="" span="">利用常數避免索引超限

  {    lcd.print(strall.charAt(i));    }

 for (int i=8; i<strall.length(); i++)

  {    lcd.print(strall.charAt(i));    }

  }