unlock_flash() spi.close()
Standard esptool.py fails:
: Use the official UnlockTool or specialized utilities to disable "Read Protection" or "Critical Partition" locks before attempting to write the full firmware. writing flash programmer... fail unlock tool
Frequently indicates that the DRAM initialization failed, usually due to using the wrong firmware or Scatter file for your specific hardware. 3. Hardware Lock (CSM or Security) unlock_flash() spi