1. A universal receiver for being operably coupled to a movable barrier operator, the universal receiver comprising: a port configured to be connected to a preexisting receiver and receive a control signal from the preexisting receiver in response to the preexisting receiver receiving a signal transmitted at a first frequency and including a code; at least one radio antenna configured to receive signals transmitted at different frequencies including the signal transmitted at the first frequency and including the code; and a controller operably coupled to the port and the at least one radio antenna, the controller configured to determine the code of the signal received by the at least one radio antenna, the controller configured to learn the code in response to a user-independent learning condition being met, the user-independent learning condition including the port receiving the control signal from the preexisting receiver.