WIRELESS TRANSMISSION SYSTEM, CONTROL METHOD, AND STORAGE MEDIUM

A wireless transmission system includes a first substrate and a second substrate. A first coil used for wireless power transmission, a first light emitting element that is arranged inside the first coil and that is used for wireless communication, and a first light receiving element arranged on the same circumference as that of the first light emitting element are arranged on the first substrate. The first substrate and the second substrate are arranged so as to be opposed to each other so that a second light emitting element and a second light receiving element, which are arranged on the second substrate, are opposed to the first light emitting element and the first light receiving element.