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extmod/modbluetooth: Add discover complete events for svc/char/desc.

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Without this it's difficult to implement a state machine correctly if the
desired services are not found.
This commit is contained in:
Jim Mussared
2020-05-11 21:46:56 +10:00
committed by Damien George
parent e6881f0829
commit 6a3c89d584
5 changed files with 100 additions and 28 deletions
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17
examples/bluetooth/ble_temperature_central.py
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@@ -80,6 +80,8 @@ class BLETemperatureCentral:
# Connected device.
self._conn_handle = None
self._start_handle = None
self._end_handle = None
self._value_handle = None
def _irq(self, event, data):
@@ -124,18 +126,31 @@ class BLETemperatureCentral:
# Connected device returned a service.
conn_handle, start_handle, end_handle, uuid = data
if conn_handle == self._conn_handle and uuid == _ENV_SENSE_UUID:
self._start_handle, self._end_handle = start_handle, end_handle
elif event == _IRQ_GATTC_SERVICES_DONE:
# Service query complete.
if self._start_handle and self._end_handle:
self._ble.gattc_discover_characteristics(
self._conn_handle, start_handle, end_handle
self._conn_handle, self._start_handle, self._end_handle
)
else:
print("Failed to find environmental sensing service.")
elif event == _IRQ_GATTC_CHARACTERISTIC_RESULT:
# Connected device returned a characteristic.
conn_handle, def_handle, value_handle, properties, uuid = data
if conn_handle == self._conn_handle and uuid == _TEMP_UUID:
self._value_handle = value_handle
elif event == _IRQ_GATTC_CHARACTERISTICS_DONE:
# Characteristic query complete.
if self._value_handle:
# We've finished connecting and discovering device, fire the connect callback.
if self._conn_callback:
self._conn_callback()
else:
print("Failed to find temperature characteristic.")
elif event == _IRQ_GATTC_READ_RESULT:
# A read completed successfully.