ESP32 + dimmer AC: Guru Meditation Error e IRAM_ATTR — cause e soluzione 26 feb 2026 0 52 TL;DR: If your ESP32 with an AC dimmer crashes ("Guru Meditation Error" or "Cache disabled but cached memory region accessed"), the cause is that the zero-cross ISR handler is not marked with IRAM_ATT... ESP32 IRAM_ATTR WiFi ac-dimmer troubleshooting Leggi di più