Saving and restoring lights (HMCharacteristics)

I am using HomeKit related lights for notifications. I would like to take the current state (color, brightness, on / off) of each light in use and restore the light to that state after the notification is complete. However, it doesn't work.

This is how I try to do it:

I have a dictionary that displays a dictionary of characteristics and their values ​​for each light (HMService).

I am running the following code to process and save the current state of the lights:

for service in services {
    for characteristic in service.characteristics {
        if characteristic.characteristicType == HMCharacteristicTypeHue ||
            characteristic.characteristicType == HMCharacteristicTypeSaturation ||
            characteristic.characteristicType == HMCharacteristicTypeBrightness {
            characteristic.readValue(completionHandler: { (error) in
                if error != nil {
                    print(error!.localizedDescription)
                } else {
                    var characteristicsStore: [String : Any?] = [:]
                    if let existingCharacteristics = self.services[service] {
                        characteristicsStore = existingCharacteristics
                    }
                    characteristicsStore.updateValue(characteristic.value, forKey: characteristic.characteristicType)
                    self.services.updateValue(characteristicsStore, forKey: service)
                }
            })
        }
    }
}

      

        
        
        
      

    

Then, after the notification is complete, I run this code, which should set the characteristics of the lights back to the values ​​I saved, but doesn't work:

for (service, characteristics) in services {
    for (characteristicType, characteristicValue) in characteristics {
        if let characteristic = service.characteristics.first(where: { (aCharacteristic) -> Bool in
            aCharacteristic.characteristicType == characteristicType
        }) {
            characteristic.writeValue(characteristicValue, completionHandler: { (error) in
                if error != nil {
                    print(error!.localizedDescription)
                    didSucceed = false
                    numberOfErrors += 1
                } else {
                    print("Updated \(characteristic.characteristicTypeToString()) to \(characteristicValue as! Float)")
                }
            })
        } else {
            print("Did not find the characteristic")
        }
    }
}

      

        
        
        
      

    

I am getting the error: Unconfigured Parameter when I try to read or write values.

UPDATE:

I did make progress and then update on my Hue models. Now I am worse than before. I cannot access any of the accessory properties of the HMService objects, making it impossible to check if an accessory is available without a ton of rewriting.

If anyone can help me figure out what I am doing wrong, or if I am completely missing something, we would be very grateful.