CODEWITHSUNDEEP
c#serial-port
Bill
Bill

Reputation: 345

Serial Communication - byte stream

I am attempting to serially communicate with a XM tuner. The tuner requires that a series of bytes be sent from the comport to control the tuner, an example of the command stream would be as follows: "B8,4D,18,30,20,B8". Initially, I attempted to send the command as a string (below), which did not work.

 _Comport.Write("B8,4D,18,30,20,B8");

I also attempted to convert the command to a byte array, however this also was not effective.

 System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
 Byte[] bytes = encoding.GetBytes("B8,4D,18,30,20,B8");               
 _Comport.Write(bytes,0,bytes.Length);

The comport is open and receives messages from the tuner; however I am at a loss as to how to transmit the stream of bytes to the tuner. Could someone kindly steer me as to how I need to communicate appropriately with the tuner?

Upvotes: 2

Views: 652

Answers (1)

vcsjones
vcsjones

Reputation: 141703

If you want to literally send those as bytes, not an ASCII byte representation, you would do something like this:

var bytes = new byte[] { 0xB8, 0x4D, 0x18, 0x30, 0x20, 0xB8 };
_Comport.Write(bytes, 0, bytes.Length);

The 0x in front of the numbers indicates to the compiler that they are hexadecimal numbers.

Upvotes: 6

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