Could you store the data in one of the other options on a device other than an attribute? As I understand it these are meant for values that are used in defined / event-based values for use in automations or things like dashboard display. Other data could be stored in state variables and state data (I could have the terms wrong there). Could you not use these.
I feel like @bertabcd1234 or @thebearmay or someone with similar authority can guide you on this with more confidence than I can... At least from within the Community.... And obviously Victor.... 
