Nordic stack and drivers for the mbed BLE API

Dependents:   BLE_ANCS_SDAPI BLE_temperature BLE_HeartRate writable_gatt ... more

This pull request has been accepted and merged in by Rohit Grover

write permission not set for 'write without response' characteristic

If a characteristic only supports the 'write without response' property, write permissions are not set properly.

Set write permission for 'write without response' characteristics.