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Editorial Team
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Asked: 2026-06-13T05:08:33+00:00

I am having an interesting problem using Monodroid to send commands to a device

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I am having an interesting problem using Monodroid to send commands to a device via Bluetooth.

I am using this Monodroid method:

BluetoothSocket.OutputStream.Write(byte[] buffer, int offset, int count);

I need to send the following 8-byte frame:

  • 0x51
  • 0x26
  • 0x0
  • 0x0
  • 0x0
  • 0x0
  • 0xFFFFFFA3
  • 0x0

The problem is that 0xFFFFFFA3 is a signed byte (-93) so this means I need to use C#.NET’s sbyte rather than byte to create the array to pass to the Write method.

However, I cannot pass an sbyte[] array to the Write method I can only pass a byte[] array. C#.NET does not allow me to put 0xFFFFFFA3 in a byte because it is signed.

What can I do to pass the command through the socket? Thank you.

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1 Answer

  1. Editorial Team

    0xFFFFFFA3 is the size of an Int32, which may be why the compiler is complaining. You should be able to just specify a byte value of 0xA3.

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