Provided by: esptool_2.6+dfsg-1_all bug


       espefuse - ESP32 efuse get/set tool


       usage: espefuse [OPTION] COMMAND

   command arguments:
       Run espefuse {command} -h for additional help

       dump   Dump raw hex values of all efuses

              Print human-readable summary of efuse values

              Burn the efuse with the specified name

              Disable readback for the efuse with the specified name

              Disable writing to the efuse with the specified name

              Burn a 256-bit AES key to EFUSE BLK1,BLK2 or BLK3 (flash_encryption, secure_boot).

              Burn  non-key  data to EFUSE BLK1, BLK2 or BLK3. Don't use this command to burn key
              data for Flash Encryption or Secure Boot, as the byte order of keys is swapped (use

              Permanently  set  the internal flash voltage regulator to either 1.8V, 3.3V or OFF.
              This means GPIO12 can be high or low at reset without changing the flash voltage.

              Display information about ADC calibration data stored in efuse.

              Burn a 48-bit Custom MAC Address to EFUSE BLK3.

              Prints the Custom MAC Address.

   optional arguments:
       -h, --help
              show this help message and exit

       --baud BAUD, -b BAUD
              Serial port baud rate used when flashing/reading

       --port PORT, -p PORT
              Serial port device

       --before {default_reset,no_reset,esp32r1,no_reset_no_sync}
              What to do before connecting to the chip

              Do not pause for confirmation before permanently writing efuses. Use with caution.


       Display device features, SPI flash manufacturer and device ID:

           esptool flash_id

       Flash ESP8266 Espressif AT v1.6.2 firmware to ESP-WROOM-02 board:

           esptool write_flash --flash_mode dio --flash_size 4MB-c1 0x00 boot_v1.7.bin 0x1000 at/1024+1024/ 0xfe000 blank.bin 0x3fc000 esp_init_data_default_v08.bin 0x3fe000 blank.bin

       Flash ESP32 Espressif AT v1.1.1 firmware to ESP-WROOM-32 board:

           esptool write_flash --flash_mode dio --flash_freq 40m --flash_size detect 0x1000 bootloader/bootloader.bin 0x20000 at_customize.bin 0x21000 customized_partitions/ble_data.bin 0x24000 customized_partitions/server_cert.bin 0x26000 customized_partitions/server_key.bin 0x28000 customized_partitions/server_ca.bin 0x2a000 customized_partitions/client_cert.bin 0x2c000 customized_partitions/client_key.bin 0x2e000 customized_partitions/client_ca.bin 0xf000 phy_init_data.bin 0x100000 esp-at.bin 0x8000 partitions_at.bin

       Display ESP32 efuse state summary:

           espefuse --port /dev/ttyUSB0 summary

       Generate a flash encryption key:

           espsecure generate_flash_encryption_key key.bin

       Burn the key to the device (WARNING: one time only operation):

           espefuse --port /dev/ttyUSB1 burn_key flash_encryption key.bin

       Encrypt flash data:

           espsecure encrypt_flash_data --keyfile key.bin --address 0x10000 -o my-app-encrypted.bin my-app.bin

AUTHOR was started by Fredrik Ahlberg as an unofficial  community  project,  currently
       maintained  by  Angus  Gratton and supported by Espressif Systems (Shanghai) PTE LTD. This
       manual page has been produced by Milan Kupcevic <> for the Debian  project
       and can be used by others.


       Review: <>
       Known issues: <>
       Report new issues at: <>


       Copyright  ©  2014-2017  Fredrik  Ahlberg, Angus Gratton, Espressif Systems (Shanghai) PTE
       LTD,  other  contributors  as  noted.   License  GPLv2+:  GNU  GPL  version  2  or   later
       <>.   This  is  free  software: you are free to change and
       redistribute it.  There is NO WARRANTY, to the extent permitted by law.


       esptool(1), espefuse(1), espsecure(1)