A method for assembling a device on two substantially parallel taut threads. The device includes an electronic chip and two substantially parallel grooves open on opposite sides of the device. The distance separating the grooves corresponds to the distance separating the threads. The device presents a penetrating shape along an axis perpendicular to the plane of the grooves, having a base at the level of the grooves and an apex of smaller size than the distance separating the threads. The method includes the steps consisting in placing the apex of the device between the two threads; in moving the device between the two threads resulting in the threads being separated from one another by the penetrating shape of the device; and in continuing movement of the device until the threads penetrate into the grooves reverting to their initial separation distance.