Отправка массива в serialPort

int mas01[]={82,164,73,146,37,74,148,41}

char[] buffer01 = new char[8];
char[] kon01=new char[8];
for (int i = 0; i < 8; i++)
{
char str = (char)kon01[i];
buffer01[i] = kon01[i];
}
serialPort1.Write(buffer01, 0, 4);

int[] mas01 = { 82, 164, 73, 146, 37, 74, 148, 41 };
char[] outmas = mas01.Select(p => (char)p).ToArray();

int[] mas1 = new int[8];
int[] mas_b = new int[] {1,2,4,8,16,32,64,128}; 
  // тут mas1 заполняется ноликами и единичками 
x1 = mas1[i] * mas_b[i];
x = x + x1;

serialPort1.Write(buffer01, 0, 4);

const int latchPin = 8;
const int clockPin = 12;
const int dataPin = 11;
 void setup()
{
  pinMode(latchPin, OUTPUT);
  pinMode(dataPin, OUTPUT); 
  pinMode(clockPin, OUTPUT);
  Serial.begin(9600); 
delay(1000);
 
}
void loop()
{
  char x[9];
  if(Serial.available()>0)
{ 
  Serial.readBytes(x,8);
  }
  for(int i=0; i<8; i++)
  {
  digitalWrite(latchPin, LOW); 
  shiftOut(dataPin, clockPin, MSBFIRST, x[i]); //нижний ряд
  shiftOut(dataPin, clockPin, MSBFIRST, x[i]); //верхний ряд
  delay(200);
  digitalWrite(latchPin, HIGH);
  } 
}

int[] mas01 = { 82, 164, 73, 146, 37, 74, 148, 41 };
byte[] outmas = mas01.Select(p => (byte)p).ToArray();
serialPort1.Write(outmas, 0, outmas.Length);