1/3 Bug Advisory Title Bug Advisory Concerning Applications Using Auto Light Sleep on ESP32-C6 with Certain ESP-IDF Versions Issue Date 2025/07/10 Advisory Number AR2024-006 Serial Number NA Version V1.1 Issue Summary Issue 1: On ESP32-C6 chips (chip revision v0.1 and above), for applications using both Wi-Fi and Bluetooth LE modules with auto light sleep mode enabled, there may be Wi-Fi communication exceptions or beacon timeout issues due to incorrect software configuration of slow clock sources in the MODEM PWR domain. Issue 2: On ESP32-C6 chips, after initializing the Wi-Fi module (without starting it) and enabling auto light sleep mode, the system may experience a TG0_WDT_HPSYS reset due to the retention clock of the Wi-Fi module not being enabled. Impact Analysis Affected Product Series: Issue 1 affects ESP32-C6 chip revision v0.1 and above for applications using both Wi-Fi and Bluetooth LE modules with auto light sleep mode enabled. This issue does not influence chip revision v0.0. Issue 2 occurs when the system enters sleep mode after the application initializes Wi-Fi but does not start it. For how to identify chip revisions, please refer to ESP32-C6 Series SoC Errata. ESP-IDF Affected Versions: Issue 1: 2/3 ESP-IDF Branch Affected Commit IDs Affected ESP-IDF Versions master Commits before e14eadf9 (excluded) NA release/v5.3 Commits before c56b21bb (excluded) v5.3-beta1 ~ v5.3-beta2 release/v5.2 Commits before 4fa32cff (excluded) v5.2 ~ v5.2.2  release/v5.1 6ec52679 - 44ed05a5 (excluded) v5.1.1 ~ v5.1.4 Issue 2: ESP-IDF Branch Affected Commit IDs Affected ESP-IDF Versions master Commits before 3ec68b90 (excluded) NA release/v5.3 Commits before 5feffad9 (excluded) v5.3-beta1 ~ v5.3-beta2 release/v5.2 Commits before a5acd57d (excluded) v5.2 ~ v5.2.2  release/v5.1 Commits before 67ee7eea (excluded) v5.1 ~ v5.1.4  Mitigation ESP-IDF Patched Versions: Issue 1: ESP-IDF Branch Fixed Commit IDs Fixed ESP-IDF Versions master a7721235 and e14eadf9 NA release/v5.3 1aaae85a and c56b21bb v5.3 release/v5.2 5ff245f7 and 4fa32cff v5.2.3 release/v5.1 47418a88 and 44ed05a5 v5.1.5 Issue 2: ESP-IDF Branch Fixed Commit IDs Fixed ESP-IDF Versions master 3ec68b90 NA release/v5.3 5feffad9 v5.3 release/v5.2 a5acd57d v5.2.3 release/v5.1 67ee7eea v5.1.5 3/3 Recommendations for Application Developers If your application involves both the coexistence of Wi-Fi and Bluetooth and auto sleep mode, and you are using an effected ESP-IDF version, it is recommended to use fixed ESP-IDF versions mentioned above or versions after the fixed commit. If you encounter problems during the upgrade process, please provide the ESP-IDF version or Commit ID to Espressif. We will confirm and handle related matters as soon as possible. Revision History Date Version Release notes 2025/07/10 V1.1 Updated Fixed ESP-IDF Versions status. 2024/08/30 V1.0 Initial release.