Method of assigning and fixing each of logical connection sequence numbers to multiple cube devices having the same group number

A method of assigning and fixing each of logical connection sequence numbers to a plurality of cube devices having the same group number in a method of connecting each of cube devices of a modular robot on which the plurality of cube devices having built-in Bluetooth modules are mounted and an app of a smart device, the method comprising:

• (A) assigning a group number to each of the cube devices (100) through the app of the smart device when the plurality of cube devices (100) to be grouped are in an ON state and storing the assigned group number in an internal flash memory of the cube device (100);
• (B) setting only cube devices (100) to which an input group number is assigned to be paired with the app of the smart device when an arbitrary group number is input through the app of the smart device;
• (C) manufacturing a modular robot (200) on which the cube device (100) to which the input group number is assigned is mounted;
• (D) pairing each of the cube devices (100) with the app of the smart device in a predetermined order according to a mounting position of each of the cube devices (100) when the cube device (100) mounted on the modular robot (200) is in the ON state;
• (E) fixing a current connection sequence number of each of the cube devices (100) mounted on the modular robot (200) by storing the connection sequence number of the paired cube device (100) in the internal flash memory of the cube device (100) by pressing a command button of each of the paired cube devices (100);
• and
• (F) operating the cube device (100) according to the connection sequence number fixed to each of the cube devices (100) regardless of a pairing sequence between each of the cube devices (100) and the smart device when pairing with the app of the smart device by turning on the plurality of cube devices (100) again which is mounted on the modular robot (200) and has the fixed connection sequence number.