Few things are more demoralizing in firmware development than a generic error code during a critical phase. In the ESP32 Matter ecosystem, CHIP_ERROR_INTERNAL (0xAC) during the PASE (Passcode Authenticated Session Establishment) or commissioning phase is a notorious showstopper. You see the BLE connection succeed, the credentials exchange begin, and then the process hangs until the commissioner (Google Home, Apple Home, or chip-tool ) throws 0xAC and disconnects. This is almost never an internal memory error. It is usually a networking identity crisis caused by stale Thread Operational Datasets . The Root Cause: Thread Dataset Mismatches To understand why 0xAC occurs, you must look at how Matter commissioning hands over credentials. BLE Handshake: The phone connects to the ESP32 via BLE. Thread Provisioning: The phone sends the Thread Network credentials (PAN ID, Channel, Network Key) to the ESP32. Network Switch: ...
Android, .NET C#, Flutter, and Many More Programming tutorials.