1/2 Bug Advisory Title Bug Advisory on Updating Software Drivers for ESP32-H2 Chips in Low-Temperature Scenarios Issue Date 2025/02/25 Advisory Number AR2024-012 Serial Number NA Version V1.0 Issue Summary For certain ESP32-H2 chips, the PLL (Phase-Locked Loop) clock occasionally fails to start in low-temperature conditions, leading to chip malfunction. Impact Analysis Affected Product Series: ESP32-H2 ESP-IDF Affected Versions: ESP-IDF Branch Affected Commit IDs Affected ESP-IDF Versions release/v5.4 All commits before 023d772d (excluded) No related release release/v5.3 All commits before bfe4d479 (excluded) v5.3 - v5.3.2 release/v5.2 All commits before 1fc6ee67 (excluded) v5.2 - v5.2.3 release/v5.1 All commits before 7312ba8b (excluded) v5.1 - v5.1.5 2/2 Mitigation If the ESP32-H2 product is used in low-temperature operating scenarios, and the ESP- IDF version in use is among the affected versions, be sure to upgrade to the fixed ESP- IDF version (as shown in the table below). ESP-IDF Patched Versions: ESP-IDF Branch Fixed Commit ID Fixed ESP-IDF Versions release/v5.4 023d772d v5.4 release/v5.3 bfe4d479 v5.3.3 release/v5.2 1fc6ee67 v5.2.4 release/v5.1 7312ba8b v5.1.6 Recommendations for Application Developers If the ESP32-H2 chip is used in low-temperature operating scenarios, and the ESP-IDF version in use is among the affected versions, it is recommended to upgrade to the fixed ESP-IDF version (see the table above). If you encounter any issues during the upgrade process, please provide the IDF version or Commit ID to Espressif. We will confirm and handle related matters as soon as possible.