UART bytes to string issue

NETMF & Gadgeteer
1

I have a simple UART routine not returning the correct string. Im sending “AAABBBCCC” and can clearly see the bytes in the b array when I inspect it but when I do the …GetChars it return “~~”

        private void gprs_DataReceivedEvent(object state)
    {
        int read, pos;
            int NumberOfBytesToRead = gprs_serial.BytesToRead;

            if (NumberOfBytesToRead > 0)
            {
                byte[] b = new byte[NumberOfBytesToRead];
                read = gprs_serial.Read(b, 0, b.Length); //
                string word= new String(Encoding.UTF8.GetChars(b, 0, b.Length)); //always return ~~
            }

    }
2

Does it work correctly if you just use an array and convert it

3

why not utf8.getstring?

4

Thinks i found the issue but not sure how to resolve. What does Encoding.UTF8.GetChars do for non utf8 chars?

This is the packet it receives…
``b = new Byte[] { 126, 0, 11, 129, 0, 4, 54, 2, 65, 65, 66, 66, 67, 67, 182 };

string dd = new String(Encoding.UTF8.GetChars(b, 0, b.Length));//this appears to fail if non ascii characters found?

5

It doesn’t work, that is known. But what do you think it should return?

6

thanks Gus, ill do some custom decoding to allow it to work…thought it would ignore the non utf8 chars but guess not.

7

You say you are sending “AAABBBCCC” and get back ~~ sounds more like you have the wrong baud rate as “AAABBBCCC” is valid UTF8

8

thanks, the isue has been resolved by removing not valid utf8 data from byte array