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Dear developers

The Z-Uno implementation of SoftwareSerial::read() has two problems

1.
If the buffer is empty, read() returns 0
whereas the Arduino implementation returns -1.

2.
read() will return data beyond the end pointer of the buffer and wrap around to previously read data.

I think many would appreciate the implemention to be changed to match the standard implentation.
The neccessary changes in the source code are minimal.

Cheers
Sebastian

Thank you for your feedback. We will add it to our list

Great - thanks.

I made a huge mistake in my initial post.
read() returns of course -1 when the buffer is empty. I edited my post.