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E (598) esp_image: Checksum failed. Calculated 0xcb read 0xe4
E (598) boot: Factory app partition is not bootable
E (599) boot: No bootable app partitions in the partition table
Seems to me the bootloader was corrupted.
The standard procedure that pressing BOOT key after reset (where bootloader enters flash update mode) has no function now.
How I can recover the module? Please help.