The PARKLIO® Library is integrated in the Client App and when provided with an PARKLIO® Guest Key will connect to the PARKLIO® Barrier using Bluetooth Low Energy and get the status, lower or extend the barrier so that the user can park on the reserved parking space. The PARKLIO® API is used to authenticate the Client API, serve data to the Client API and receive the barrier states from the PARKLIO® Gateway. The PARKLIO® System will allow Clients to integrate a full parking monitor and control access solution to their parking lot using the PARKLIO® Barriers, PARKLIO® Gateways and PARKLIO® API. It is easily integrated withing already functioning parking reservation systems and client apps and can serve as an added value to their parking solutions.