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67 lines (53 loc) · 2.15 KB
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"""Bluetooth interface
"""
import logging
import platform
from meshtastic.mesh_interface import MeshInterface
from meshtastic.util import our_exit
if platform.system() == 'Linux':
# pylint: disable=E0401
import pygatt
# Our standard BLE characteristics
TORADIO_UUID = "f75c76d2-129e-4dad-a1dd-7866124401e7"
FROMRADIO_UUID = "8ba2bcc2-ee02-4a55-a531-c525c5e454d5"
FROMNUM_UUID = "ed9da18c-a800-4f66-a670-aa7547e34453"
class BLEInterface(MeshInterface):
"""A not quite ready - FIXME - BLE interface to devices"""
def __init__(self, address, noProto=False, debugOut=None):
if platform.system() != 'Linux':
our_exit("Linux is the only platform with experimental BLE support.", 1)
self.address = address
if not noProto:
self.adapter = pygatt.GATTToolBackend() # BGAPIBackend()
self.adapter.start()
logging.debug(f"Connecting to {self.address}")
self.device = self.adapter.connect(address)
else:
self.adapter = None
self.device = None
logging.debug("Connected to device")
# fromradio = self.device.char_read(FROMRADIO_UUID)
MeshInterface.__init__(self, debugOut=debugOut, noProto=noProto)
self._readFromRadio() # read the initial responses
def handle_data(handle, data): # pylint: disable=W0613
self._handleFromRadio(data)
if self.device:
self.device.subscribe(FROMNUM_UUID, callback=handle_data)
def _sendToRadioImpl(self, toRadio):
"""Send a ToRadio protobuf to the device"""
#logging.debug(f"Sending: {stripnl(toRadio)}")
b = toRadio.SerializeToString()
self.device.char_write(TORADIO_UUID, b)
def close(self):
MeshInterface.close(self)
if self.adapter:
self.adapter.stop()
def _readFromRadio(self):
if not self.noProto:
wasEmpty = False
while not wasEmpty:
if self.device:
b = self.device.char_read(FROMRADIO_UUID)
wasEmpty = len(b) == 0
if not wasEmpty:
self._handleFromRadio(b)