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Querying/setting MAC address is pretty adhoc operation to belong to
.config() instead of taking a whole method on its own.

Instead of extracting 4th element, extact last. Much easier to remember!

Instead of extracting 4th element, extact last. Much easier to remember!

Useful for testing fragmentation issues in OS heap. E.g. freemem() may
report large amount, but is it possible to actually allocate block of
a given size? Issue malloc() (followed by free()) to find out.

Return number of free inernal WiFi buffers.

Returning free number of various WiFi driver packet buffers.

Network interfaces are now controlled individually using .active() method.

The port name is lowercase, and this change is made for consistency with
the docs and other ports.

ANSI C doesn't require that strncpy() produced null-terminated string, so
it's basicly useless for string manipulation.

Link to vendor forum with datasheets, etc. is provided, as well as inline
TTX.

Previously, "import _io" worked on both CPython and MicroPython (essentially
by a chance on CPython, as there's not guarantee that its contents will stay
the same across versions), but as the module was renamed to uio, need to use
more robust import sequence for compatibility.

This machine.I2C documentation is now closer to a more port-neutral
description, although there are still differences between WiPy and
ESP8266.

A standard I2C address is 7 bits but addresses 0b0000xxx and 0b1111xxx
are reserved.  The scan() method is changed to reflect this, along with
the docs.

Fixes build under MacOSX.