      */
     func send(_ request: SecureDFURequest, onResponse response: SecureDFUResponseCallback?, onError report: ErrorCallback?) {
         // Save callbacks and parameter
+        self.success  = nil
         self.response = response
         self.report   = report
         

    */
    func enableNotifications(onSuccess success: Callback?, onError report: ErrorCallback?) {
        // Save callbacks
        self.success = success
        self.report  = report
        
        // Get the peripheral object
        let peripheral = characteristic.service.peripheral

     */
    func send(_ request: SecureDFURequest, onSuccess success: Callback?, onError report: ErrorCallback?) {
        // Save callbacks and parameter
        self.success  = success
        self.response = nil
        self.report   = report
        
        // Get the peripheral object
        let peripheral = characteristic.service.peripheral
