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[讨论] app控制蓝牙连接的RGB

各位盆友你们好，最近做了个RGB的三色灯，调试的时候总是出点小差，故此，想拿上来和各位盆友讨论讨论:)
希望大家不要喷哦，虽然东西垃圾了点:P

讨论点：为什么串口上面的数据会出错（不出错的话应该是0-255）——>因为用的是pwm波调的...?
            为什么手机APP发送多组数据后，突然发送后串口上数据不变了（我估计是接收不到了）——>不知道蒙的对不对？

注：串口上面的数据详情看附件

附上一段代码吧--
char state[10];
int x, y , z ;
float q, w, e;
int led1 = 3;
int led2 = 5;
int led3 = 6;
int led4 = 9;

void setup()
{
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);

  analogWrite(led1, 15);
  analogWrite(led2, 15);
  analogWrite(led3, 15);
  analogWrite(led4, 15);
  Serial.begin(9600);
}
void loop()
{
  int j = 0;
  int i = 0;
  int mark = 0;

  while (Serial.available() > 0)    //串口获取可用数据
  {
for (int i = 0; i < 10; i++)
{
   state[i] = char(Serial.read());             //把串口收到的数据寄存到state
   delay(100);
}
delay(200);

x = (state[1] - 0x30 ) * 100 + (state[2] - 0x30 ) * 10 + (state[3] - 0x30 ) * 1;
y = (state[4] - 0x30 ) * 100 + (state[5] - 0x30 ) * 10 + (state[6] - 0x30 ) * 1;
z = (state[7] - 0x30 ) * 100 + (state[8] - 0x30 ) * 10 + (state[9] - 0x30 ) * 1;

q = x * 2.55;

w = y * 2.55;

e = z * 2.55;

analogWrite(led1, q);
analogWrite(led2, w);
analogWrite(led3, e);
analogWrite(led4, 100);
   Serial.print("    ");
   Serial.print(q);
   Serial.print("    ");
   Serial.print(w);
   Serial.print("    ");
   Serial.println(e);

x = 0;
y = 0;
z = 0;
  }
}

实际效果图