ArneJoris
commented
3 years ago Python script for central to repeat this:
from bluezero import device, GATT, adapter
import time
dongle = list(adapter.Adapter.available())[0]
dongle.powered = False
dongle.powered = True
peripherals = []
def deviceFound(dev):
if dev.address not in peripherals:
peripherals.append(dev.address)
dongle.on_device_found = deviceFound
dongle.nearby_discovery(timeout=5)
adapterAddress=dongle.address
def connect(deviceAddress):
d = device.Device(adapterAddress, deviceAddress)
d.connect(timeout=30)
print("Connected to device %s." %deviceAddress)
def disconnect(deviceAddress):
d = device.Device(adapterAddress, deviceAddress)
d.disconnect()
print("Disconnected from device %s." %deviceAddress)
def gattResolved(deviceAddress):
c = GATT.Characteristic(adapterAddress, deviceAddress, "b4703001-eb6b-4b82-ae21-cf035a429a94", "b4703002-eb6b-4b82-ae21-cf035a429a94")
return c.resolve_gatt()
while True:
print("Found %d perihperals: %s." %(len(peripherals), ",".join(peripherals)))
for p in peripherals:
connect(p)
for i in range(0,5):
for address in peripherals:
print("Device %s GATT resolved: %s" %(address, gattResolved(address)))
time.sleep(5)
for p in peripherals:
disconnect(p)
for i in range(0,2):
for address in peripherals:
print("Device %s GATT resolved: %s" %(address, gattResolved(address)))
time.sleep(5)
Vudentz
When the central connects to a single peripheral, GATT services are resolved after a few seconds.
When the central connects to two peripherals, the GATT services of the most recently connected peripheral are resolved for just a few seconds.:
This has been repeated on bluez-5.58, bluez-5.60, bluez-5.61 and bluez-5.51. Cache = always, or Cache = no seems to make no difference.
Bluetoothd -nEd output:
Btmon output on the central when connecting to two peripherals: