Key is always entered as a string, but if security is WEP, the key
is converted automatically to hex before connecting or configuring
the device as an AP.
Changes are based on this post:
https://github.com/micropython/micropython/issues/876#issuecomment-115255551
The constructor can optionally take the same params of iwconfig in
order to configure WiFi when creating the object. Params are
keyworkd only. The WiPy accepts:
- mode (int -> WLAN.AP or WLAN.STA)
- ssdi (string)
- security (int -> WLAN.OPEN, WLAN.WEP, WLAN.WPA, WLAN.WPA2)
- key (string)
- channel (int (1-11))
- antenna (int -> WLAN.INTERNAL, WLAN.EXTERNAL)
With network.server_timeout(secs) the timeout can be changed.
The default value is 300 secs. Minimmum accpeted is 5 secs.
Without params the function returns the current configured timeout.
While in STA mode isconnected() returns True when connected to an AP
and the IP has been acquired. In AP mode, WLAN.isconnected() returns
True if at least one connected station is present.
Each result is displayed like this:
ssid='MySSID', bssid=b'\xc0J\x00z.\xcc', security=2, channel=None, rssi=-74
The CC3200 doesn't provide channel info, that why is 'None'.
Previous to this patch the printing mechanism was a bit of a tangled
mess. This patch attempts to consolidate printing into one interface.
All (non-debug) printing now uses the mp_print* family of functions,
mainly mp_printf. All these functions take an mp_print_t structure as
their first argument, and this structure defines the printing backend
through the "print_strn" function of said structure.
Printing from the uPy core can reach the platform-defined print code via
two paths: either through mp_sys_stdout_obj (defined pert port) in
conjunction with mp_stream_write; or through the mp_plat_print structure
which uses the MP_PLAT_PRINT_STRN macro to define how string are printed
on the platform. The former is only used when MICROPY_PY_IO is defined.
With this new scheme printing is generally more efficient (less layers
to go through, less arguments to pass), and, given an mp_print_t*
structure, one can call mp_print_str for efficiency instead of
mp_printf("%s", ...). Code size is also reduced by around 200 bytes on
Thumb2 archs.
Unfortunately, these timeouts are the only realiable way (for now), to
be able to detect broken connections due to half-open sockets. Such a
thing occurs when getting out of the WiFi coverage area or when
disconnecting from the AP (sometimes the client doesn't send the
disconnect packet).
