something like this, for simple reading.
notice that you call read, but the actual access to c.value is in update_value -- so your code just needs to be asynchronous, responding to value updates there.
if you need synchronous access, it becomes harder, since your main code needs to wait until the value has been updated. which can be tricky because i dont think there is a guarantee that when you request a read, that a read actually happens by the device, etc.
CHPROPS={cb.CH_PROP_BROADCAST:'Broadcast',
cb.CH_PROP_READ:'Read',
cb.CH_PROP_WRITE_WITHOUT_RESPONSE:'WriteWithoutResponse',
cb.CH_PROP_WRITE:'Write',
cb.CH_PROP_NOTIFY:'Notify',
cb.CH_PROP_INDICATE:'Indicate',
cb.CH_PROP_AUTHENTICATED_SIGNED_WRITES:'AuthSignedWrites',
cb.CH_PROP_EXTENDED_PROPERTIES:'ExtendedProps',
cb.CH_PROP_NOTIFY_ENCRYPTION_REQUIRED:'NotifyEncrypReq',
cb.CH_PROP_INDICATE_ENCRYPTION_REQUIRED:'IndicateEncrReq'}
#...inside your manager...
def did_discover_characteristics(self, s, error):
# You can now read or write the characteristic's value
props=[]
for propbit,name in CHPROPS.items():
if c.properties & propbit:
props.append(name)
print(f'-UUID:{c.uuid} PROPS:{",".join(props)}')
if cb.CH_PROP_READ & c.properties:
self.peripheral.read_characteristic_value(c)
def did_update_value(self, c):
'''called when characteristic is read'''
print(f'-UUID:{c.uuid} + VALUE:{c.value}')
