Arduino UNO學習220．訊息控制LED燈

Arduino學習220．訊息控制LED燈

再利用Pin13內建的LED燈,在通訊視窗上的傳出訊號欄打上”A”時亮燈3秒,

並顯示”LED ON”回傳,找出ArduBlock拼圖塊↓

 

void setup()

{

        Serial.begin(9600);

Serial.begin(9600);

        pinMode( 13 , OUTPUT);

}

void loop()

{

        if (( ( Serial.read() ) == ('A') ))

        {

        Serial.print( "LED ON" );

Serial.println();

                digitalWrite( 13 , HIGH );

                delay( 3000 );

                digitalWrite( 13 , LOW );

        }

}

 

程式先判斷是否有文字輸入,再判斷若是輸入”1”時亮燈ON,

若是輸入”0”時熄燈OFF,如都不是則顯示”ERROR”↓

 

char _ABVAR_1_temp = ' ' ;

void setup()

{

        Serial.begin(9600);

        pinMode( 13 , OUTPUT);

Serial.begin(9600);

}

void loop()

{

        if (( ( Serial.available() ) > ( 0 ) ))

        {

                _ABVAR_1_temp = Serial.read();

                if (( ( _ABVAR_1_temp ) == ('1') ))

        {

                digitalWrite( 13 , HIGH );

        Serial.print( "LED ON" );

Serial.println();

        }

        else

        {

                if (( ( _ABVAR_1_temp ) == ('0') ))

        {

                digitalWrite( 13 , LOW );

        Serial.print( "LED OFF" );

Serial.println();

        }

        else

        {

        Serial.print( "ERROR!" );

Serial.println();

        }

        }

        }

}

其中的指令”讀取序列Serial.read”為讀取1個字元,

而”可用的資料Serial.available”為讀取數值,
 

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