st3m: wifi: Make camp wifi setting functional

Add a wifi module which manages the interface setup when camp wifi is
enabled.

python_payload/mypystubs/network.pyi

+from st3m.goose import Optional
+
+STA_IF: int
+
+class WLAN:
+    def __init__(self, mode: int) -> None:
+        pass
+    def active(self, active: bool) -> bool:
+        return False
+    def connect(self, ssid: bytes, key: Optional[bytes] = None) -> None:
+        pass
+    def isconnected(self) -> bool:
+        return False

python_payload/st3m/run.py

@@ -13,7 +13,7 @@ from st3m.ui.view import View, ViewManager, ViewTransitionBlend
 from st3m.ui.elements.menus import SimpleMenu, SunMenu
 from st3m.application import discover_bundles, BundleMetadata
 from st3m.about import About
-from st3m import settings, logging, processors
+from st3m import settings, logging, processors, wifi
 
 import captouch, audio, leds, gc
 import os
@@ -35,6 +35,9 @@ def _make_reactor() -> Reactor:
 
     settings.onoff_button_swap.subscribe(_onoff_button_swap_update)
     _onoff_button_swap_update()
+
+    settings.onoff_camp_wifi.subscribe(wifi._onoff_camp_wifi_update)
+    wifi._onoff_camp_wifi_update()
     return reactor
 
 

python_payload/st3m/wifi.py

+import network
+from st3m import settings
+
+iface = None
+
+
+def setup_camp_wifi() -> None:
+    global iface
+    iface = network.WLAN(network.STA_IF)
+    iface.active(True)
+    iface.connect(b"Camp2023-open")
+
+
+def disable() -> None:
+    if iface is not None:
+        iface.active(False)
+
+
+def is_connected() -> bool:
+    if iface is not None:
+        return iface.isconnected()
+    else:
+        return False
+
+
+def _onoff_camp_wifi_update() -> None:
+    if settings.onoff_camp_wifi.value:
+        setup_camp_wifi()
+    else:
+        disable()

sim/fakes/network.py

+STA_IF = 1
+
+
+class WLAN:
+    def __init__(self, mode):
+        pass
+
+    def active(self, active):
+        return False
+
+    def connect(self, ssid, key=None):
+        pass
+
+    def isconnected(self):
+        return False