3 Replies Latest reply on Jul 6, 2020 5:08 AM by DheerajK_81

    CY5677 CySmart 1.3 API (C#): WriteCharacteristicWithoutResponse error

    RoCr_1612056

      I'm using the cypress BLE dongle (CY5677 - the red PCB; running latest firmware from CySmart 1.3) to communicate with a BLE peripheral. I'm using the C# CySmart API.

       

      When using the ICyGattClient.WriteCharacteristicWithoutResponse interface, I sometimes get a result back 'BLE_ERROR_INVALID_OPERATION' in the 'OnCharacteristicWrite' callback. What does this mean? I cannot find it in the documentation.

       

      Note that this error is not returned when calling the function (as a return value), but in the callback of the function.