Android和Arduino都通過藍牙接收奇怪的值

Question

我使用Android側的BluetoothChat代碼通過聊天框向Arduino UNO發送開/關信號（我正在發送110,119或其他下面定義的情況） ，但是當我顯示接收到的值時，它會在Arduino串口監視器中顯示奇怪的值，即255,254,250或245，並在Android端也回覆奇怪的值。

但令人驚訝的是，當我從android發送這些命令並且沒有其他指令/ LED正確執行/打開/關閉時，110,119等中的單個條件成爲真。

任何人都可以幫我找出問題嗎？以下是我的arduino代碼。

int data; 
String message; 

void setup() 
{ 
Serial.begin (57600); 

pinMode (6, OUTPUT); 
pinMode (7, OUTPUT); 
pinMode (8, OUTPUT); 
pinMode (9, OUTPUT); 
pinMode (10, OUTPUT); 

digitalWrite(6, LOW); // off LED 1 at pin6 
digitalWrite(7, LOW); // off LED 2 at pin7 
digitalWrite(8, LOW); // off LED 3 at pin8 
digitalWrite(9, LOW); // off LED 4 at pin9 
digitalWrite(10, LOW); // off LED 5 at pin10 
} 

void loop() { 
int i=0; 
if (Serial.available()>0) 
{ 
int data= Serial.read(); 

Serial.println (" Received data: "); 
Serial.println (data); 

if (data==110) //q 
{ 
digitalWrite(6, HIGH); // turn on LED 1 at pin6 
message = "LED 1 On"; 
Serial.println (message); 

} 
if (data==102) // a 
{ 
digitalWrite(6, LOW); // off LED 1 at pin6 
message = "LED 1 Off"; 
Serial.println (message); 
} 

if (data==96) //c 
{ 
digitalWrite(7, HIGH); //on LED 2 
message = "LED 2 On"; 
Serial.println (message); 
} 

if (data==115) //d 
{ 
digitalWrite(7, LOW); // off LED 2 
message = "LED 2 Off"; 
Serial.println (message); 
} 

if (data==111) //e 
{ 
digitalWrite(8, HIGH); //on LED 3 
message = "LED 3 On"; 
Serial.println (message); 
} 

if (data==97)// f 
{ 
digitalWrite(8, LOW); //sets the LED 3 
message = "LED 3 Off"; 
Serial.println (message); 
} 

if (data==107) //g 
{ 
digitalWrite(9, HIGH); //turn on LED 4 
message = "LED 4 On"; 
Serial.println (message); 
} 

if (data==120)//h 
{ 
digitalWrite(9, LOW); //sets the LED 4 
message = "LED 4 Off"; 
Serial.println (message); 
} 


if (data==99) //i 
{ 
digitalWrite(10, HIGH); //sets the LED 5 
message = "L5 high"; 
Serial.println (message); 
} 

if (data==104) //j 
{ 
digitalWrite(10, LOW); //sets the LED 5 
message = "LED 5 Off"; 
Serial.println (message); 
} 

if (data==112) //y 
{ 
digitalWrite(6, HIGH); // turn on ALL LEDs 
digitalWrite(7, HIGH); 
digitalWrite(8, HIGH); 
digitalWrite(9, HIGH); 
digitalWrite(10, HIGH); 
message = "ALL LEDs ON"; 
Serial.println (message); 
} 


if (data==122)//z 
{ 
digitalWrite(6, LOW); //Turn off all LEDs 
digitalWrite(7, LOW); 
digitalWrite(8, LOW); 
digitalWrite(9, LOW); 
digitalWrite(10, LOW); 
Serial.println ("ALL LEDs OFF"); 
} 

else 
{ 
digitalWrite(13, HIGH); //sets the LED 5 
delay(3000); //3sec 
digitalWrite(13, LOW); 
delay(3000); 
Serial.println (" else case executed "); 

} ////end of else 

} 
data=0; 
} 

Answer 1

嘗試char data = Serial.read（）;

並顯示適用於Android的Java代碼。

見100％的工作代碼Bluetooth Arduino&Android

Answer 2

如果使用Arduino的烏諾，那麼你就不能使用串行監控打印值，如果您已經使用串行通信，藍牙，因爲它只有一個串口。

您必須使用軟件串行庫或使用具有4個串行端口的Arduino Mega。