How connect two ble device and recevier two ble device data??

[lai-Ryan]

• bleak ### version:0.8.0
• Python version:3.7.2
• Operating System:windows10
• BlueZ version (bluetoothctl -v) in case of Linux: no

Description

Planning to receive data from two BLE devices at the same time and for a long time,
Currently, two BLE devices can be connected at the same time, but using asyncio cannot be used at the same time
Receiving notifications from two devices (because only one at a time), the result will be one notification, receiving a lot of times and the other one is rarely.

What I Did

python Code:

def notification_handler1(sender, data):
    print("Device1")
def notification_handler2(sender, data):
    print("Device2")
async def connect_1(address1,CHARACTERISTIC_UUID1, loop):
    async with BleakClient(address1, loop=loop) as client:
        B1 = await client.connect()
        if B1 == True:
            print("Connect[3C:A5:08:0A:B2:3C]successful!!")
        await client.start_notify(CHARACTERISTIC_UUID1, notification_handler1)
        #asyncio.sleep(10.0) 

async def connect_2(address2,CHARACTERISTIC_UUID2, loop):
    async with BleakClient(address2, loop=loop) as client:
        B2 = await client.connect()
        if B2 == True:
            print("Connect[3C:A5:08:0A:B2:3C]successful!!")
        await client.start_notify(CHARACTERISTIC_UUID2, notification_handler2)
        await asyncio.sleep(20.0) 

def threads1():
    print("1111thread1")
    address1 = "3C:A5:08:0A:B2:3C"
    CHARACTERISTIC_UUID1 = "0000ffe1-0000-1000-8000-00805f9b34fb"
    loop = asyncio.new_event_loop()
    asyncio.set_event_loop(loop)
    loop.run_until_complete(connect_1(address1,CHARACTERISTIC_UUID1,loop))

def threads2():
    print("2222thread2")
    address2 = "3C:A5:19:0A:15:D2"
    CHARACTERISTIC_UUID2 = "0000be02-0000-1000-8000-00805f9b34fb"
    loop = asyncio.new_event_loop()
    asyncio.set_event_loop(loop)
    loop.run_until_complete(connect_2(address2,CHARACTERISTIC_UUID2,loop))

def main():
    threads_1 = threading.Thread(target=threads1)
    threads_2 = threading.Thread(target=threads2)
    threads = [threads_1,threads_2]
    [ t.start() for t in threads ]


if __name__ == "__main__":
    main()

==============================================================
[result-display]
Device1
Device1
Device1
Device1
Device1
Device1
Device1
Device1
Device1
Device2
Device1
Device1
Device1
Device1

[hbldh]

Check out the example with two devices for how to approach it. It is better without the threading module.

https://github.com/hbldh/bleak/blob/develop/examples/two_devices.py

[lai-Ryan]

Hi hbldh~~
I would like to ask about this example[ two_device.py],
It is two BLE Device connect and two Device to receive data,
Q1:But instead of two devices receiving data at the same time, only one device is receiving data at a time!!
how to two devices together recevier data??
Q2:two device notify_uuid is different how to Modify the program??

[hbldh]

Q1:But instead of two devices receiving data at the same time, only one device is receiving data at a time!!
how to two devices together recevier data??

In the example, both devices register for notifications and receive them. Try running it after modifying for your usecase.

Q2:two device notify_uuid is different how to Modify the program??

There are many ways. Examples:

• Two different connect_to_device methods with different hard-coded notification uuids.
• Send the desired notification uuid as input to connect_to_device

Experiment. Use the two_devices.py as a rough sketch and work your way forward.

[RIES-endo]

This seems to be the same my problem #576
I can' t solve it now.