Linux Bluetooth Support

[gunaNeelamegam]

Bluetooth BLE Support

• Need's to Advertisment Custom Service's.
• Connect and Disconnect.
• Bluetooth characteristic properties.
  • Read
  • Write
  • Notification
  • Indication

[gunaNeelamegam]

import asyncio
from bluez_peripheral.util import *
from bluez_peripheral.advert import Advertisement
from bluez_peripheral.agent import NoIoAgent
from bluez_peripheral.gatt.service import Service
from bluez_peripheral.gatt.characteristic import characteristic, CharacteristicFlags as CharFlags
from bluez_peripheral.advert import PacketType
from bluez_peripheral.gatt.descriptor import descriptor,DescriptorFlags
from random import randbytes,randint

NAVIGATION_LOCATION_SERVICE = "1234"
CURRENT_COORINATE_CHAR = "0001"
TEXT_LOCATION_CHAR = "0002"
CURRENT_DESC = "0003"
DOWNLOAD_ROUTE = "0004"

class LocationService(Service):

    def __init__(self):
        super().__init__(NAVIGATION_LOCATION_SERVICE, True)


    @characteristic(CURRENT_COORINATE_CHAR, CharFlags.WRITE)
    def text_navigation_characteristic(self, options):
        pass

    @text_navigation_characteristic.setter
    def text_navigation_read(self, data, options):
        print("inside read function")
        print("Data :", data)

    @characteristic(TEXT_LOCATION_CHAR, CharFlags.NOTIFY)
    def current_coordinate(self, options):
        print("triggered notify")

    @characteristic(DOWNLOAD_ROUTE, CharFlags.READ | CharFlags.WRITE)
    def send_coordinate(self, options):
        print("reading characteristics")
        return b"hello from charactertics"

    @send_coordinate.setter
    def download_map_on_message(self, data, options):
        print("inside on_message map download response")
        print(data)

    def update_location_coordinate(self, count):
        self.current_coordinate.changed(randbytes(count))

    @descriptor(CURRENT_DESC, text_navigation_characteristic, DescriptorFlags.READ | DescriptorFlags.WRITE)
    def get_refresh_btn(*args,**kwargs) :
        return b"current_cooridnate"

    @get_refresh_btn.setter
    def refresh_button_pressed(self, data , descriptor_options):
        if data := data.decode():
            print(data)



"""
when creating
"""
async def main():
    bus = await get_message_bus()
    service = LocationService()

    await service.register(bus)
    agent = NoIoAgent()
    await agent.register(bus)
    adapter = await Adapter.get_first(bus)
    advert = Advertisement("Android Prober",[NAVIGATION_LOCATION_SERVICE],0,0, packet_type= PacketType.PERIPHERAL)
    await advert.register(bus, adapter)

    try:
        while True:
            value = randint(0, 1000)
            service.update_location_coordinate(value % 514)
            await asyncio.sleep(5)

    except KeyboardInterrupt as e:
        await bus.wait_for_disconnect()


if __name__ == "__main__":
    asyncio.run(main())
    
    ```