Use local version of able

libs/able/examples/alert/main.py

@@ -0,0 +1,64 @@
+"""Turn the alert on Mi Band device
+"""
+from kivy.app import App
+from kivy.uix.button import Button
+
+from able import BluetoothDispatcher, GATT_SUCCESS
+from error_message import install_exception_handler
+
+
+class BLE(BluetoothDispatcher):
+    device = alert_characteristic = None
+
+    def start_alert(self, *args, **kwargs):
+        if self.alert_characteristic:  # alert service is already discovered
+            self.alert(self.alert_characteristic)
+        elif self.device:  # device is already founded during the scan
+            self.connect_gatt(self.device)  # reconnect
+        else:
+            self.stop_scan()  # stop previous scan
+            self.start_scan()  # start a scan for devices
+
+    def on_device(self, device, rssi, advertisement):
+        # some device is found during the scan
+        name = device.getName()
+        if name and name.startswith('MI'):  # is a Mi Band device
+            self.device = device
+            self.stop_scan()
+
+    def on_scan_completed(self):
+        if self.device:
+            self.connect_gatt(self.device)  # connect to device
+
+    def on_connection_state_change(self, status, state):
+        if status == GATT_SUCCESS and state:  # connection established
+            self.discover_services()  # discover what services a device offer
+        else:  # disconnection or error
+            self.alert_characteristic = None
+            self.close_gatt()  # close current connection
+
+    def on_services(self, status, services):
+        # 0x2a06 is a standard code for "Alert Level" characteristic
+        # https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.characteristic.alert_level.xml
+        self.alert_characteristic = services.search('2a06')
+        self.alert(self.alert_characteristic)
+
+    def alert(self, characteristic):
+        self.write_characteristic(characteristic, [2])  # 2 is for "High Alert"
+
+
+class AlertApp(App):
+
+    def build(self):
+        self.ble = None
+        return Button(text='Press to Alert Mi', on_press=self.start_alert)
+
+    def start_alert(self, *args, **kwargs):
+        if not self.ble:
+            self.ble = BLE()
+        self.ble.start_alert()
+
+
+if __name__ == '__main__':
+    install_exception_handler()
+    AlertApp().run()