Control module for adjusting view angle of rearview mirror via vehicular digital bus

A control module (M1,M0,M3) for adjusting the view angle of a rearview mirror via a controller area network (CAN) bus (10) is disclosed. The control module is connected to a CAN bus and a rearview mirror (113,114) of a vehicle. Upon reading and decoding a digital encoded signal which is transmitted on the vehicular digital bus (10) and corresponds to a turning operation of the vehicle, the control module adjusts a view angle of the monitor device according to the decoded information.