There is an external hardware device which sends its status to an httpserver, I get that data from the httpserver and process it.

Sometimes the hardware devices sends "I'm not ready" for for 3 to 15 seconds and will then send new status of "I'm ready"

session.request(IP:String, method: .get, parameters: queryItems)
      .validate()
      .responseString { response in
      switch response.result {
          case .success:
            deviceStatus = response.description
              if deviceStatus == "I'm ready" 
              { 
              //update UI 
              }else {
              //"I'm not ready"
              //device is not ready, do I recurse here?
              }

          case let .failure(error):
            print(error.localizedDescription)
        }

How do I set up the recusion until the device is "I'm ready"? Should I wrap the requestion func inside of completion handlers?