Multiple BLE connections

[kevinevans]

Is it possible to have multiple concurrent BLE connections on the ESP32? The documentations says it supports up to 9 client devices, but I can't even get two concurrent connections using the GATT security server example code (https://github.com/espressif/esp-idf/tr ... ity_server). Is there something that I should be setting to get multiple connections? BLE 4.2 should support a higher number of connections regardless of its role (central vs peripheral).

Here's what I'm using as the client code (on two separate devices):

Code: [Select all] [Expand/Collapse]

1. import asyncio
2. from bleak import BleakScanner, BleakClient
3.  
4. address = 'f4:12:fa:d9:7f:52'
5.  
6. async def main(address):
7.     async with BleakClient(address, timeout=30) as client:
8.       for service in client.services:
9.         print('-------------------')
10.         print(service)
11.  
12.         for c in service.characteristics:
13.           print('+- ', c)
14.           if 'read' in  c.properties:
15.             print('   ', await client.read_gatt_char(c))
16.           else:
17.             print('   no read')
18.  
19.       await asyncio.sleep(100000)
20.  
21.  
22. asyncio.run(main(address))

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Using the script above, I can get one client to connect and hold open its connection. But on the second device, it times out and I cannot connect to the BLE device.