Electronic access control device for controlling data access to hvac devices of an hvac system

A method for controlling data access to Heating, Ventilating and Air Conditioning HVAC devices of an HVAC system using an electronic access control device comprising a plurality of electronic communication circuits and a processor connected to the electronic communication circuits, the method comprising the steps:

• establishing,- by at least one of the electronic communication circuits of the electronic access control device, a first communication link with an external computing device;
• establishing,- by at least one of the electronic communication circuits of the electronic access control device, a second communication link with one or more of the HVAC devices;
• receiving,- by the electronic access control device,- from the external computing device via the first communication link a data request directed to a particular one of the HVAC devices;
• checking authorization of the data request for the particular one of the HVAC devices- by the electronic access control device;
• ―forwarding, by the electronic access control device, the data request via the second communication link to the particular one of the HVAC devices upon affirmative authorization of the data request;
• ―receiving, by the electronic access control device, via the second communication link a data content from the particular one of the HVAC devices;
• ―generating, by the electronic access control device, a data response, using the data content;
• and
• ―transmitting, by the electronic access control device, the data response via the first communication link to the external computing device.