Electronic device for selective transmission of downlink signal to sensor controller

A control method executed by a stylus communicable with a sensor controller coupled to a sensor, the control method comprising:

• receiving, via an electrode of the stylus, an uplink signal from the sensor via capacitive coupling, wherein the uplink signal includes a local identifier;
• responsive to the local identifier in the uplink signal received via the electrode being not stored in a memory of the stylus, storing the local identifier in the memory;
• generating a downlink signal including a global identifier that distinguishes the stylus from other styluses, wherein the global identifier has a larger number of bits compared with the local identifier;
• and
• transmitting, via the electrode, the downlink signal including the global identifier to the sensor via the capacitive coupling.

A non-transitory computer-readable medium storing a program which, when executed by a stylus communicable with a sensor controller coupled to a sensor, causes the stylus to perform a process including:

• receiving, via an electrode of the stylus, an uplink signal from the sensor via capacitive coupling, wherein the uplink signal includes a local identifier;
• responsive to the local identifier in the uplink signal received via the electrode being not stored in a memory of the stylus, storing the local identifier in the memory;
• generating a downlink signal including a global identifier that distinguishes the stylus from other styluses, wherein the global identifier has a larger number of bits compared with the local identifier;
• and
• transmitting, via the electrode, the downlink signal including the global identifier to the sensor via the capacitive coupling.