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Enhanced connection management for esp32 network driver #1181

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Enhanced connection management for esp32 network driver #1181

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Commits on Nov 21, 2024

  1. Add connect and disconnect functions to ESP32 network driver 

    For more fine grained connection management in applications the driver can now
be started, without perfoming an inital connection, by the use of the key
`managed` in the STA configuration.

Adds network:sta_connect/0,1 to allow connecting to an access point after the
driver has been started in STA or STA+AP mode. If the function is used without
parameters a connection to the last configured access point will be started.

Adds network:sta_disconnect/0 to disconnect a station from an access point.

The station mode disconnected callback now maintains the default behavior of
reconnecting to the last access point if the connection is lost, but if the
user defines a custom callback the automatic re-connection will not happen,
allowing for users to take advantage of scan results or some other means to
determine when and which access point to associate with.

The combination of the use of a disconnected callback and `managed` mode allow
for the use of `network:wifi_scan/0,1` (PR atomvm#1165), since the wifi must not be
connected to a station when perfoming a scan and the current implementation
always starts a connection immediatly and always reconnects when disconnected.

Signed-off-by: Winford <[email protected]>
    @UncleGrumpy
    UncleGrumpy committed Nov 21, 2024
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  2. Updated "Network Programmers Guide" documentation 

    Adds descriptions of new configuration options and connect/0,1
and disconnect/0 functions.

Signed-off-by: Winford <[email protected]>
    @UncleGrumpy
    UncleGrumpy committed Nov 21, 2024
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