mirror of
https://github.com/undera/pylgbst.git
synced 2020-11-18 19:37:26 -08:00
128 lines
4.2 KiB
Python
128 lines
4.2 KiB
Python
import logging
|
|
import re
|
|
import threading
|
|
from time import sleep
|
|
|
|
import gatt
|
|
|
|
from pylgbst.comms import Connection, MOVE_HUB_HW_UUID_SERV, MOVE_HUB_HW_UUID_CHAR, \
|
|
MOVE_HUB_HARDWARE_HANDLE
|
|
from pylgbst.utilities import str2hex
|
|
|
|
log = logging.getLogger('comms-gatt')
|
|
|
|
|
|
class CustomDevice(gatt.Device, object):
|
|
def __init__(self, mac_address, manager):
|
|
gatt.Device.__init__(self, mac_address=mac_address, manager=manager)
|
|
self._notify_callback = lambda hnd, val: None
|
|
self._handle = None
|
|
|
|
def connect(self):
|
|
gatt.Device.connect(self)
|
|
log.info("Waiting for device connection...")
|
|
while self._handle is None:
|
|
log.debug("Sleeping...")
|
|
sleep(1)
|
|
|
|
if isinstance(self._handle, BaseException):
|
|
exc = self._handle
|
|
self._handle = None
|
|
raise exc
|
|
|
|
def write(self, data):
|
|
log.debug("Writing to handle: %s", str2hex(data))
|
|
return self._handle.write_value(data)
|
|
|
|
def enable_notifications(self):
|
|
log.debug('Enable Notifications...')
|
|
self._handle.enable_notifications()
|
|
|
|
def set_notific_handler(self, func_hnd):
|
|
self._notify_callback = func_hnd
|
|
|
|
def services_resolved(self):
|
|
log.debug('Getting MoveHub services and characteristics...')
|
|
gatt.Device.services_resolved(self)
|
|
log.debug("[%s] Resolved services", self.mac_address)
|
|
for service in self.services:
|
|
log.debug("[%s] Service [%s]", self.mac_address, service.uuid)
|
|
for characteristic in service.characteristics:
|
|
log.debug("[%s] Characteristic [%s]", self.mac_address, characteristic.uuid)
|
|
if service.uuid == MOVE_HUB_HW_UUID_SERV and characteristic.uuid == MOVE_HUB_HW_UUID_CHAR:
|
|
log.debug('MoveHub characteristic found')
|
|
self._handle = characteristic
|
|
|
|
if self._handle is None:
|
|
self.manager.stop()
|
|
self._handle = RuntimeError("Failed to obtain MoveHub handle")
|
|
|
|
def characteristic_value_updated(self, characteristic, value):
|
|
value = self._fix_weird_bug(value)
|
|
log.debug('Notification in GattDevice: %s', str2hex(value))
|
|
self._notify_callback(MOVE_HUB_HARDWARE_HANDLE, value)
|
|
|
|
def _fix_weird_bug(self, value):
|
|
if isinstance(value, str) and "dbus.Array" in value: # weird bug from gatt on my Ubuntu 16.04!
|
|
log.debug("Fixing broken notify string: %s", value)
|
|
return ''.join([chr(int(x.group(1))) for x in re.finditer(r"dbus.Byte\((\d+)\)", value)])
|
|
|
|
return value
|
|
|
|
|
|
class GattConnection(Connection):
|
|
"""
|
|
:type _device: CustomDevice
|
|
"""
|
|
|
|
def __init__(self, bt_iface_name='hci0'):
|
|
super(GattConnection, self).__init__()
|
|
self._device = None
|
|
self._iface = bt_iface_name
|
|
try:
|
|
self._manager = gatt.DeviceManager(adapter_name=self._iface)
|
|
except TypeError:
|
|
raise NotImplementedError("Gatt is not implemented for this platform")
|
|
|
|
self._manager_thread = threading.Thread(target=self._manager.run)
|
|
self._manager_thread.setDaemon(True)
|
|
log.debug('Starting DeviceManager...')
|
|
|
|
def connect(self, hub_mac=None, hub_name=None):
|
|
self._manager_thread.start()
|
|
self._manager.start_discovery()
|
|
|
|
while not self._device:
|
|
log.info("Discovering devices...")
|
|
devices = self._manager.devices()
|
|
log.debug("Devices: %s", devices)
|
|
|
|
for dev in devices:
|
|
address = dev.mac_address
|
|
name = dev.alias()
|
|
if self._is_device_matched(address, name, hub_mac, hub_name):
|
|
self._device = CustomDevice(address, self._manager)
|
|
break
|
|
|
|
if not self._device:
|
|
sleep(1)
|
|
|
|
self._device.connect()
|
|
return self
|
|
|
|
def disconnect(self):
|
|
self._manager.stop()
|
|
self._device.disconnect()
|
|
|
|
def write(self, handle, data):
|
|
self._device.write(data)
|
|
|
|
def set_notify_handler(self, handler):
|
|
self._device.set_notific_handler(handler)
|
|
|
|
def enable_notifications(self):
|
|
self._device.enable_notifications()
|
|
|
|
def is_alive(self):
|
|
return self._manager_thread.isAlive()
|