CODEWITHSUNDEEP
javaserializationserial-porthexarrays
Hana90
Hana90

Reputation: 925

How to translate byte received from serial port to hexadecimal?

i need to read serial port for my sensor board and i use this example to read data coming. but i surprised that the output data on console terminal look like this 

Wÿðÿ8Ã?íÈÓÿ

because i use this System.out.print(new String(buffer,0,len)); this method just print the data each time its receive packet.

but when i used this method for hexa digit the output will write zeros before it receive any data !!

this method 

    byte[] arr = { 0x00, 0x01 };
    ByteBuffer wrapped = ByteBuffer.wrap(arr); // big-endian by default
    short  num = wrapped.getShort();
    String f=String.valueOf(num);
    System.out.print(f);

So how to deal with this issue to translate incoming bytes to readable data in hexa !!!

Upvotes: 1

Views: 1640

Answers (2)

Perception
Perception

Reputation: 80603

Try this instead:

final byte[] arr = new byte[] { 0x00, 0x01 }; // or whatever your byte array is
final String asHexStr = DatatypeConverter.printHexBinary(arr)
System.out.println(asHexStr);

Upvotes: 3

recursion.ninja
recursion.ninja

Reputation: 5488

You should utilize existing interfaces to their full potential. Consider using printf.

byte[] arr = { 0x00, 0x01 };
ByteBuffer wrapped = ByteBuffer.wrap(arr); // big-endian by default
boolean read = true;
while(read)
  try { System.out.printf("%x",wrapped.get()); } //get each byte, print as hex
  catch(BufferUnderflowException ex) { read = false; } //stop at empty buffer
}

Upvotes: 1

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