Cascading method, device and equipment for multiple expansion modules and computer readable storage medium

The invention provides a multi-expansion-module cascading method, device and equipment and a computer readable storage medium, the multi-expansion-module cascading method is applied to the multi-expansion-module cascading equipment, and the multi-expansion-module cascading equipment comprises at least two expansion modules in communication connection with a main control module. The main control module and the expansion module are cascaded in a staggered manner, and the method comprises the steps that the main control module receives a selection signal sent by a preset application program, and the main control module acquires a module identifier corresponding to the selection signal; the main control module controls to start a target expansion module corresponding to the module identifier, and the main control module communicates with the target expansion module through the preset application program; the expansion modules are not provided with dial-up openings, and the main control module communicates with th