Disclosed is a method of mounting chips, including the steps of: dipping a mounting board in a solvent in which chips are dispersed; and mounting the chips on the mounting board by forming electric field gradients on the mounting board in correspondence with positions where the chips are to be mounted. The system controller includes an application controller which is adapted to be connected to the network and stores a plurality of system points corresponding to a plurality of system variables relating to the network devices. Hooked clips are fixed and positioned at the top and exterior sides of each filter lens frame member. The retransmission decision is performed either at the transmitting or at the receiving side. The substrate used here can absorb light of wavelengths other than those of red, green and blue three primary colors. The system can include one or multiple transmitters comprising electromagnetic beacons, software defined radio receivers with an associated processing unit and data acquisition system, and magnetic antennas.