I have create a custom generic message class in iOS, to pass some data value to nordic device, in generic onoff server. Here i face problem that when i try to send the message to nordic device, it sends again again the message.

Question

when i use that message to pass some data value to nordic device, in generic onoff server. i face problem that when i try to send the message to nordic device, it sends again again the message. In console log appear as resending the message in access layer. After 3 to 4 try it get canceled with a error message. I use docklight to check receive message in nordic device and it verify that it receive the message. i am using the nrf5 sdk 540 device to test. 
 
 message parameter contain [int8] array 
 import Foundation
public struct GenericConfigSet: GenericMessage, TransactionMessage, TransitionMessage {
 
 public static let opCode: UInt32 = 0x8206
 // public static let responseType: StaticMeshMessage.Type = GenericLevelStatus.self
 
 public var tid: UInt8!
 public var parameters: Data? {
 let data = Data() + byteArray + tid
 if let transitionTime = transitionTime, let delay = delay {
 return data + transitionTime.rawValue + delay
 } else {
 return data
 }
 }
 
 /// The target value of the Generic Level state.
 public let byteArray: [UInt8]
 
 public let transitionTime: TransitionTime?
 public let delay: UInt8?
 
 
 public init(parameter: [UInt8]) {
 self.byteArray = parameter
 self.transitionTime = nil
 self.delay = nil
 }
 
 
 /// - parameters:
 /// - transitionTime: The time that an element will take to transition
 /// to the target state from the present state.
 /// - delay: Message execution delay in 5 millisecond steps.
 public init(parameter: [UInt8], transitionTime: TransitionTime, delay: UInt8) {
 self.byteArray = parameter
 self.transitionTime = transitionTime
 self.delay = delay
 }
 
 public init?(parameters: Data) {
 
 print("
 call by system 
")
 guard parameters.count == 3 || parameters.count == 5 else {
 return nil
 }
 byteArray = [parameters[0]] //check for any error later.
 tid = parameters[2]
 if parameters.count == 5 {
 transitionTime = TransitionTime(rawValue: parameters[3])
 delay = parameters[4]
 } else {
 transitionTime = nil
 delay = nil
 }
 }
 
}