The present disclosure provides a barrier operator system in which a remotely located transceiver type controller is in wireless communication with a transceiver type adapter connected to a barrier operator, and in electronic communication with the barrier operator's microcontroller. The controller is operable to wirelessly transmit door operator status inquiries to the adapter. This may be effected automatically in connection with the transmission and receipt by the adapter of door toggle commands or separate and apart from same. The status information is wirelessly transmitted by the adapter in broadcast form without source or destination address to the remote device in a signal that is non-addressed broadcast door operator (and, indirectly, door) status information by relying upon the receipt of the message by the remote within the specific time limit of the reception window of the remote.

A notification device includes a memory and a processor coupled to the memory. The processor is configured to acquire a distance between a door provided at a vehicle and an obstacle facing the door, and, in a case in which the distance is equal to or less than a reference threshold value determined in advance by an occupant of the vehicle, and a condition determined in advance by the occupant is satisfied, provide notification of the distance to the occupant by a method determined in advance by the occupant.

A device for opening and closing a vehicle door including a processor that detects an obstacle around a vehicle based on an opening command signal or a closing command signal of the vehicle door and calculates a distance to the detected obstacle, and an actuator that controls a motor to open or close the vehicle door based on the detected obstacle or the distance to the obstacle. The processor controls the actuator to open or close the vehicle door at one of a plurality of opening levels or a plurality of closing levels based on the detection of the obstacle or the distance to the obstacle, and the plurality of opening levels and the plurality of closing levels exclude a fully closed level and a fully open level of the vehicle door.