ios – Can’t Convert String to Int from BLE Knowledge

I’ve spent 3 weeks avoiding this query on Stackover stream however I am at my wits finish.

I do not know why I can create a string manually and convert it into an INT however cannot do the identical factor from BLE knowledge.

That is my code:

func peripheral(_ peripheral: CBPeripheral, didUpdateValueFor attribute: CBCharacteristic, error: Error?) {
        
        if error != nil {
            print("ERROR ON UPDATING VALUE FOR CHARACTERISTIC: (attribute) - (String(describing: error?.localizedDescription))")
            return
        }
        
        
        guard let knowledge = attribute.worth else{
            return
        }
        
      //  let myString = "345345" // I CAN MANUALLY SET A STRING
        
      //  let myInt = Int(myString) ?? 2
       // print (myInt + 523436) I CAN CONVERT AND USE THIS INT
        
      
        
        let weightStringData = swiftDataToString(ESP32Data: knowledge)
        
        func swiftDataToString(ESP32Data:Knowledge) -> String? {
            return String(knowledge: knowledge, encoding: .utf8)
        }
        
       
        if let myNewstring = weightStringData{
            
          //  print(myNewstring) // THIS PRINTS AS A STRING
            
            let myInt = Int(myNewstring) ?? 2 //THIS DOES NOTHING IT SEEMS OTHER THAN SET THE CONSTANT TO "2"

          print (myInt + 9898) //CANT USE THE INT LIKE IN THE ABOVE MANUAL EXAMPLE
            
   
            
        }else{
               print("Nothing")
           }
       
        
        
        
        
        }
    }