| # Copyright 2021-2022 Google LLC |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # https://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| |
| # ----------------------------------------------------------------------------- |
| # Imports |
| # ----------------------------------------------------------------------------- |
| from ..gatt_client import ProfileServiceProxy |
| from ..gatt import ( |
| GATT_BATTERY_SERVICE, |
| GATT_BATTERY_LEVEL_CHARACTERISTIC, |
| TemplateService, |
| Characteristic, |
| CharacteristicValue, |
| PackedCharacteristicAdapter |
| ) |
| |
| |
| # ----------------------------------------------------------------------------- |
| class BatteryService(TemplateService): |
| UUID = GATT_BATTERY_SERVICE |
| BATTERY_LEVEL_FORMAT = 'B' |
| |
| def __init__(self, read_battery_level): |
| self.battery_level_characteristic = PackedCharacteristicAdapter( |
| Characteristic( |
| GATT_BATTERY_LEVEL_CHARACTERISTIC, |
| Characteristic.READ | Characteristic.NOTIFY, |
| Characteristic.READABLE, |
| CharacteristicValue(read=read_battery_level) |
| ), |
| format=BatteryService.BATTERY_LEVEL_FORMAT |
| ) |
| super().__init__([self.battery_level_characteristic]) |
| |
| |
| # ----------------------------------------------------------------------------- |
| class BatteryServiceProxy(ProfileServiceProxy): |
| SERVICE_CLASS = BatteryService |
| |
| def __init__(self, service_proxy): |
| self.service_proxy = service_proxy |
| |
| if characteristics := service_proxy.get_characteristics_by_uuid(GATT_BATTERY_LEVEL_CHARACTERISTIC): |
| self.battery_level = PackedCharacteristicAdapter( |
| characteristics[0], |
| format=BatteryService.BATTERY_LEVEL_FORMAT |
| ) |
| else: |
| self.battery_level = None |