Script to check battery levels of both the halves

split_battery_check.py

@@ -0,0 +1,50 @@
+from datetime import datetime
+from dbus_next.aio import MessageBus
+from dbus_next.constants import BusType
+import asyncio
+BLUEZ = "org.bluez"
+#replace hci0 with your bluetooth adapter name and FF_FF_FF_FF_FF_FF with your keyboard address
+BLUEZ_PATH = "/org/bluez/hci0/dev_EC_88_89_88_6D_2A"
+GATT_SERVICE = 'org.bluez.GattService1'
+GATT_CHARACTERISCITC = 'org.bluez.GattCharacteristic1'
+GATT_CHARACTERISCITC_DESCR = 'org.bluez.GattDescriptor1'
+BATTERY_UUID = "0000180f-0000-1000-8000-00805f9b34fb"
+BATTERY_LEVEL_UUID = "00002a19-0000-1000-8000-00805f9b34fb"
+BATTERY_USER_DESC = "00002901-0000-1000-8000-00805f9b34fb"
+
+
+loop = asyncio.get_event_loop()
+
+
+async def main():
+    bus = await MessageBus(bus_type=BusType.SYSTEM).connect()
+    # the introspection xml would normally be included in your project, but
+    # this is convenient for development
+    introspection = await bus.introspect(BLUEZ, BLUEZ_PATH)
+
+    device = bus.get_proxy_object(BLUEZ, BLUEZ_PATH, introspection)
+
+    for svc in device.child_paths:
+        intp = await bus.introspect(BLUEZ, svc)
+        proxy = bus.get_proxy_object(BLUEZ, svc, intp)
+        intf = proxy.get_interface(GATT_SERVICE)
+        if BATTERY_UUID == await intf.get_uuid():
+            for char in proxy.child_paths:
+                intp = await bus.introspect(BLUEZ, char)
+                proxy = bus.get_proxy_object(BLUEZ, char, intp)
+                intf = proxy.get_interface(GATT_CHARACTERISCITC)
+                level = int.from_bytes(await intf.call_read_value({}), byteorder='little')
+                if BATTERY_LEVEL_UUID == await intf.get_uuid():
+                    props = proxy.get_interface('org.freedesktop.DBus.Properties')    
+                    for desc in proxy.child_paths:
+                        intp = await bus.introspect(BLUEZ, desc)
+                        proxy = bus.get_proxy_object(BLUEZ, desc, intp)
+                        intf = proxy.get_interface(GATT_CHARACTERISCITC_DESCR)
+                        name = "Main"
+                        if BATTERY_USER_DESC == await intf.get_uuid():
+                            name = bytearray(await intf.call_read_value({})).decode()
+                    print(name + ": ", str(level))
+
+# print the current time here
+print(datetime.now())
+loop.run_until_complete(main())