A control adapter for fastening on a HVAC device includes a wireless communication interface for communicating control signals between a remote control device and the control adapter. A wireless near-field communication interface communicates control signals between the control adapter and the HVAC device. A control circuit converts the control signals received from the wireless communications interface into the control signals of the wireless near-field communication interface and converts the control signals received from the wireless near-field communication interface into control signals of the wireless communication interface.

A control adapter for fastening on a HVAC device includes a wireless communication interface for communicating control signals between a remote control device and the control adapter. A wireless near-field communication interface communicates control signals between the control adapter and the HVAC device. A control circuit converts the control signals received from the wireless communications interface into the control signals of the wireless near-field communication interface and converts the control signals received from the wireless near-field communication interface into control signals of the wireless communication interface.

An apparatus for retimer presence detection is described herein. The apparatus includes at least one retimer, wherein an algorithm is to enable the at least one retimer to announce its presence by asserting a bit of a presence message during link initialization. The at least one retimer can declare an index and is accessible via the index.