Add DisaBLE app that disables bluetooth

Signed-off-by: Francesco Gazzetta <fgaz@fgaz.me>

README.rst

@@ -149,6 +149,10 @@ simulator:
    :alt: Simple always-on demo for showing off wasp-os at conferences and shows
    :width: 179
 
+.. image:: res/DisaBLEApp.png
+   :alt: Small application for disabling bluetooth to save power and enhance security
+   :width: 179
+
 .. image:: res/HeartApp.png
    :alt: Heart rate application running on the wasp-os simulator
    :width: 179

docs/apps.rst

@@ -47,6 +47,8 @@ Applications
 
 .. automodule:: apps.demo
 
+.. automodule:: apps.disaBLE
+
 .. automodule:: apps.flashlight
 
 .. automodule:: apps.haiku

wasp/apps/disaBLE.py

@@ -0,0 +1,61 @@
+# SPDX-License-Identifier: LGPL-3.0-or-later
+# Copyright (C) 2021 Francesco Gazzetta
+
+"""DisaBLE
+~~~~~~~~~~
+
+Disable BLE to save energy and enhance privacy.
+
+This app shows the bluetooth status and provides a button to disable/enable it.
+Unfortunately, re-enabling bluetooth normally has some issues, so as a
+workaround the "enable" button restarts the watch.
+
+.. figure:: res/DisaBLEApp.png
+    :width: 179
+"""
+
+import wasp
+import widgets
+import ble
+
+class DisaBLEApp():
+    NAME = 'DisaBLE'
+    # 1-bit RLE, 96x64, generated from res/disaBLE_icon.png, 167 bytes
+    ICON = (
+        96, 64,
+        b'\xff\x00\xff\x00\xff\x00\xff\x00g\x02]\x03\\\x03\\\x03'
+        b'\\\x03J\x01\x11\x03K\x02\x0f\x03L\x03\r\x03M\x04'
+        b'\x0b\x03N\x05\t\x03O\x06\x07\x03P\x07\x05\x03Q\x03'
+        b'\x01\x04\x03\x03L\x02\x04\x03\x02\x04\x01\x03L\x04\x03\x03'
+        b'\x03\x06N\x04\x02\x03\x02\x06P\x04\x01\x03\x01\x06R\r'
+        b'T\x0bV\tX\x07Y\x06Y\x07X\tV\x0bT\x08'
+        b'\x01\x04R\t\x02\x04P\x06\x01\x03\x03\x04P\x04\x02\x03'
+        b'\x02\x04Q\x03\x03\x03\x01\x04Q\x03\x04\x07Q\x03\x05\x06'
+        b'Q\x03\x06\x05Q\x03\x07\x04Q\x03\x08\x03Q\x03\t\x02'
+        b'Q\x03\n\x01Q\x03\\\x03\\\x03\\\x03]\x02\xff\x00'
+        b'\xff\x00\xff\x00\xff\x00g'
+    )
+
+
+    def __init__(self):
+        self._btn = widgets.Button(10, 120, 220, 80, 'Disable' if ble.enabled() else 'Reboot to enable')
+
+    def foreground(self):
+        self._draw()
+        wasp.system.request_event(wasp.EventMask.TOUCH)
+
+    def _draw(self):
+        draw = wasp.watch.drawable
+        draw.set_color(wasp.system.theme('bright'))
+        draw.fill()
+        draw.string('BLE status: ' + ('ON' if ble.enabled() else 'OFF'), 0, 60, width=240)
+        self._btn.draw()
+
+    def touch(self, event):
+        if self._btn.touch(event):
+            if ble.enabled():
+                ble.disable()
+                self._btn = widgets.Button(10, 120, 220, 80, 'Reboot to enable')
+                self._draw()
+            else:
+                wasp.machine.reset()

wasp/apps/software.py

@@ -41,6 +41,7 @@ class SoftwareApp():
         db = []
         db.append(('alarm', factory('Alarm')))
         db.append(('calc', factory('Calculator')))
+        db.append(('disaBLE', factory('DisaBLE')))
         db.append(('faces', factory('Faces')))
         db.append(('gameoflife', factory('Game Of Life')))
         db.append(('musicplayer', factory('Music Player')))

wasp/boards/manifest_240x240.py

@@ -7,6 +7,7 @@ manifest = (
     'apps/calc.py',
     'apps/clock.py',
     'apps/chrono.py',
+    'apps/disaBLE.py',
     'apps/dual_clock.py',
     'apps/faces.py',
     'apps/fibonacci_clock.py',

wasp/boards/simulator/ble.py

@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: LGPL-3.0-or-later
+# Copyright (C) 2021 Francesco Gazzetta
+
+_is_enabled = True
+
+def enable():
+    global _is_enabled
+    _is_enabled = True
+
+def disable():
+    global _is_enabled
+    _is_enabled = False
+
+def enabled():
+    return _is_enabled

wasp/boards/simulator/machine.py

@@ -130,3 +130,8 @@ def lightsleep(ms=10):
 
 def deepsleep(ms=10):
     lightsleep(ms)
+
+def reset():
+    # We don't simulate an actual watch reset, but it should be enough for what
+    # we want to test
+    print("RESET")

wasp/boards/sphinx/ble.py

@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: LGPL-3.0-or-later
+# Copyright (C) 2021 Francesco Gazzetta
+
+class enable():
+    pass
+
+class disable():
+    pass
+
+class enabled():
+    pass