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| Icon | Meaning | |------|---------| | ๐Ÿ’ก Solid light | Active measurement | | ๐Ÿ”„ Flashing | Pairing or syncing | | ๐Ÿ”ด Red | Low battery or error | | โœ”๏ธ Checkmark | Measurement successful |

Long press the Power/Play/Pause button for 3 seconds. Pairing:

Outdated firmware is a leading cause of โ€œYayusi S2 not responding.โ€ New updates fix bugs and add features.