Abstract: The present disclosure includes a heating, ventilation, and/or air-conditioning (HVAC) control system with a controller and a device communicatively coupled to the controller. The device is configured to implement an engagement protocol, wherein to grant the controller write access to protected registers of the device the engagement protocol functions to require: receiving a reset command at a reset register of the device; receiving a passcode at a passcode register of the device; matching the passcode received at the passcode register to an authentication passcode; and receiving or matching the passcode within a timeframe defined by a timer.

Abstract: Systems and methods of the present disclosure include heating, ventilation, and/or air conditioning (HVAC) air measurement devices configured to enable operators to select data relating to certain air flow parameters to be directly downloaded from the HVAC air measurement devices and/or to otherwise be transmitted directly from the HVAC air measurement devices in substantially real time during operation to enable operators to make analytical decisions quickly and to reduce design development timelines, among other things. In addition, the HVAC air measurement devices obviate the need for: (1) separate computing devices to be connected to the HVAC air measurement devices to extract the data from the HVAC air measurement devices, and/or (2) using specialized software to extract the data from the HVAC air measurement devices, as required by conventional HVAC air measurement devices.