Bug Fix for BLE and Wi-Fi

Wi-Fi fixes

• #92 WiFi library cannot connect to Wi-Fi AP with WPA + TKIP configuration. Fixed by using mixed authentication mode.

BLE fixes

• #89 Unreliable lookup method used within LBLEEventDispatcher class : use equal_range when searching for elements in STL multimap, instead of using find. find is not guaranteed to return the first element in the equal range.

• #90 Improper characteristic list implementation of LBLEClient class:

  • Add a new set of interfaces to LBLEClient that allows user to identify a characteristic by using service index and characteristic index, instead of using UUID. Note that it is possible for a device to have multiple characteristics with the same UUID.
  • Add a new example EnumerateCharacteristic.ino that uses the new indices-based interface of LBLEClient to list all the services and characteristics in the connected BLE device.
  • Use bt_gattc_read_charc instead of bt_gattc_read_using_charc_uuid to read characteristics.
  • Refactored LBLEValueBuffer to support re-interpreting its raw buffer content into String, float, int, and char types.

• #91: when calling bt_gattc_discover_charc, we need to wait for multiple BT_GATTC_DISCOVER_CHARC event. We added new helper function waitAndProcessEventMultiple that supports such event waiting behavior.