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BlueNRG notification

Question asked by klmcz on Aug 4, 2015
Latest reply on Oct 21, 2015 by klmcz
I use Blue NRG chips for BLE communication. Testing it with STEVAL-IDB003V1 with BlueNRG GUI in Master mode. In device i have defined characteristic with notification and read/write properties (1Ah). Characteristic value changed with period 1 second (epoch time).
When i read characteristic value (by ACI_GATT_READ_CHARAC_USING_UUID or ACI_GATT_READ_CHARACTERISTIC_VAL), value changed correctly, but IDB003V1 not show (or receiving) value change notification.
Whats condition must be met for value change notification? Must be defined characteristic descriptors (i thing that in sensor demo isn't defined for time)?

Thank you for answer