Bug in PR #41

[waiweng83]

There is a bug in #41.
The response from the ESP should be read one byte each time as this code is expecting an 'OK\r\n' as last 4 characters or 'ERROR\r\n' as the last 7 characters.

if response[-4:] == b"OK\r\n":
    break
if response[-7:] == b"ERROR\r\n":
    break

If we read a big chunk of data, this will be missed if there is other data flowing in after the 'OK\r\n'.
We should also stop reading from the UART buffer right after we received the 'OK\r\n' so that the data after remains in the UART buffer and can be processed by other function.

Thanks.

[waiweng83]

@PontusO Can you please take a look?

[PontusO]

You're right not sure what happened here. I'll revert this.

[waiweng83]

@PontusO Thanks a lot.

[waiweng83]

Fixed in PR #44.