bleak.exc.BleakError: This service is already present in this BleakGATTServiceCollection! #445
Description
- bleak version: 0.10.0
- Python version: 3.7.9
- Operating System: Windows 10
Description
I am trying to connect to my esp32 through BLE, the esp is running micropython with the standard micropython BLE library. I could already connect the device with my phone using Serial bluetooth interface app (https://play.google.com/store/apps/details?id=de.kai_morich.serial_bluetooth_terminal&hl=nl&gl=US) and send data back and forth.
Now I am trying to connect it to my pc using Bleak. I got some errors at my first attempts saying that the write and read characteristics UUID were wrong. Now I tried the service_explorer example (https://github.com/hbldh/bleak/blob/develop/examples/service_explorer.py) to find these UUID's. But the error: This service is already present in this BleakGATTServiceCollections comes up, this error also appeared in my first attempts to connect the devices. I searched for this error but didn't find any mentions of it.
What I Did
This is basically the service_explorer example with the esp32 address filled in.
async def run(address, debug=False):
log = logging.getLogger(__name__)
if debug:
import sys
log.setLevel(logging.DEBUG)
h = logging.StreamHandler(sys.stdout)
h.setLevel(logging.DEBUG)
log.addHandler(h)
async with BleakClient(address) as client:
x = await client.is_connected()
log.info("Connected: {0}".format(x))
for service in client.services:
log.info("[Service] {0}: {1}".format(service.uuid, service.description))
for char in service.characteristics:
if "read" in char.properties:
try:
value = bytes(await client.read_gatt_char(char.uuid))
except Exception as e:
value = str(e).encode()
else:
value = None
log.info(
"\t[Characteristic] {0}: (Handle: {1}) ({2}) | Name: {3}, Value: {4} ".format(
char.uuid,
char.handle,
",".join(char.properties),
char.description,
value,
)
)
for descriptor in char.descriptors:
value = await client.read_gatt_descriptor(descriptor.handle)
log.info(
"\t\t[Descriptor] {0}: (Handle: {1}) | Value: {2} ".format(
descriptor.uuid, descriptor.handle, bytes(value)
)
)
if __name__ == "__main__":
address = (
"BC:DD:C2:C7:93:8E"
if platform.system() != "Darwin"
else "B9EA5233-37EF-4DD6-87A8-2A875E821C46"
)
print(address)
loop = asyncio.get_event_loop()
loop.set_debug(True)
loop.run_until_complete(run(address, True))
Output
PS C:> python .\service_explorer.py
BC:DD:C2:C7:93:8E
Traceback (most recent call last):
File ".\service_explorer.py", line 58, in <module>
loop.run_until_complete(run(address, True))
File "C:\AppData\Local\Programs\Python\Python37\lib\asyncio\base_events.py", line 587, in run_until_complete
return future.result()
File ".\service_explorer.py", line 18, in run
async with BleakClient(address) as client:
File "C:\AppData\Local\Programs\Python\Python37\lib\site-packages\bleak\backends\client.py", line 59, in __aenter__
await self.connect()
File "C:\AppData\Local\Programs\Python\Python37\lib\site-packages\bleak\backends\dotnet\client.py", line 238, in connect
await self.get_services()
File "C:\AppData\Local\Programs\Python\Python37\lib\site-packages\bleak\backends\dotnet\client.py", line 440, in get_services
self.services.add_service(BleakGATTServiceDotNet(service))
File "C:\AppData\Local\Programs\Python\Python37\lib\site-packages\bleak\backends\service.py", line 116, in add_service
"This service is already present in this BleakGATTServiceCollection!"
bleak.exc.BleakError: This service is already present in this BleakGATTServiceCollection!
Thank you in advance!