Arduino - Android通訊SeekBar值

Question

我有一個通過藍牙與Arduino進行通信的應用程序。我想用seekbar改變直流電機的速度，通訊沒有任何問題，問題是我想的格式，因爲當我移動條形碼時，我檢查Arduino串行端口屏幕的結果，並看到不同的符號！ 「＃」$）（* <：其中有些是正常的字符如A，B，C ......我只需要找到0-255並試圖these answer，但它並沒有幫助之間的整數

這是Android的一部分

seekbar = (SeekBar)findViewById(R.id.seekBar); 
seekbar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() { 

     int speed= 0; 

     @Override 
     public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { 

      speed = progress; 

      if(btSocket!=null){ 
       try { 
        btSocket.getOutputStream().write(speed); 
       } catch (IOException e){ 
        msg("Error"); 
       } 
      } 
     } 

     @Override 
     public void onStartTrackingTouch(SeekBar seekBar) { 

     } 

     @Override 
     public void onStopTrackingTouch(SeekBar seekBar) { 

     } 
    }); 

這是Arduino的部分

int pwm_a = 3; 
int pwm_b = 11; 
int dir_a = 12; 
int dir_b = 13; 
char incomingByte; //incoming data for directions 
int speed; // incoming data for speed 

void setup() 
{ 
    Serial.begin(9600); 
    pinMode(pwm_a, OUTPUT); 
    pinMode(pwm_b, OUTPUT); 
    pinMode(dir_a, OUTPUT); 
    pinMode(dir_b, OUTPUT); 

    analogWrite(pwm_a, 0); 
    analogWrite(pwm_b, 0); 

} 

void loop() 
{ 
    if(Serial.available() > 0){ //if the data came 
incomingByte = Serial.read(); 
speed = Serial.read(); 


if (incomingByte == 'F'){ 
forward();} 
    else if (incomingByte == 'B'){ 
back();} 
if (incomingByte == 'R'){ 
right();} 
if (incomingByte == 'L'){ 
left();} 
if (incomingByte == 'S'){ 
stop(); 
    } 
    } 
} 

void forward() 
{ digitalWrite(dir_a, HIGH); 
    digitalWrite(dir_b, HIGH); 
    analogWrite(pwm_a, speed);  
    analogWrite(pwm_b, speed); 
} 

void back() 
{ digitalWrite(dir_a, LOW); 
    digitalWrite(dir_b, LOW); 
    analogWrite(pwm_a, speed);  
    analogWrite(pwm_b, speed); 
} 
void right() 
{ digitalWrite(dir_a, LOW); 
    digitalWrite(dir_b, HIGH); 
    analogWrite(pwm_a, speed);  
    analogWrite(pwm_b, speed); 
} 

void left() 
{ digitalWrite(dir_a, HIGH); 
    digitalWrite(dir_b, LOW); 
    analogWrite(pwm_a, speed);  
    analogWrite(pwm_b, speed); 
} 
void stop() 
{ digitalWrite(dir_a, LOW); 
    digitalWrite(dir_b, LOW); 
    analogWrite(pwm_a, 0);  
    analogWrite(pwm_b, 0); 
} 

Answer 1

我寫了一個類實現Android和Arduino的之間的藍牙連接我的代碼是在github：

https://github.com/omaflak/Bluetooth-Android

我也寫在我的博客的教程，你可能想看看它，有一個Arduino的代碼，一切：

https://causeyourestuck.io/2015/12/14/communication-between-android-and-hc-06-module/

祝你好運！