.\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.47.4.
.TH ESPEFUSE "1" "April 2018" "esptool.py 2.1" "User Commands"
.SH NAME
espefuse \- ESP32 efuse get/set tool
.SH DESCRIPTION
usage: espefuse [OPTION] COMMAND 
.IP


\&
.PP

.SS "command arguments:"
.TP

Run espefuse {command} \fB\-h\fR for additional help
.TP
dump
Dump raw hex values of all efuses
.TP
summary
Print human\-readable summary of efuse values
.TP
burn_efuse
Burn the efuse with the specified name
.TP
read_protect_efuse
Disable readback for the efuse with the specified name
.TP
write_protect_efuse
Disable writing to the efuse with the specified name
.TP
burn_key
Burn a 256\-bit AES key to EFUSE BLK1,BLK2 or BLK3
(flash_encryption, secure_boot).
.TP
set_flash_voltage
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.
.SS "optional arguments:"
.TP
\fB\-h\fR, \fB\-\-help\fR
show this help message and exit
.TP
\fB\-\-port\fR PORT, \fB\-p\fR PORT
Serial port device
.TP
\fB\-\-before\fR {default_reset,no_reset,esp32r1}
What to do before connecting to the chip
.TP
\fB\-\-do\-not\-confirm\fR
Do not pause for confirmation before permanently
writing efuses. Use with caution.
.SH EXAMPLES
Flash Espressif AT v1.4 firmware to an ESP-12S board:
.IP
esptool write_flash \-\-flash_mode dio \-\-flash_size 4MB\-c1 0x00 boot_v1.7.bin 0x1000 at/1024+1024/user1.2048.new.5.bin 0xfe000 blank.bin 0x3fc000 esp_init_data_default.bin 0x3fe000 blank.bin
.PP
Display ESP32 efuse state summary:
.IP
espefuse \-\-port /dev/ttyUSB0 summary
.PP
Generate a flash encryption key:
.IP
espsecure generate_flash_encryption_key key.bin
.PP
Burn the key to the device (WARNING: one time only operation):
.IP
espefuse \-\-port /dev/ttyUSB1 burn_key flash_encryption key.bin
.PP
Encrypt flash data:
.IP
espsecure encrypt_flash_data \-\-keyfile key.bin \-\-address 0x10000 \-o my\-app\-encrypted.bin my\-app.bin
.SH AUTHOR
esptool.py 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 was generated by Milan Kupcevic 
<milan@debian.org> for the Debian project and can be used by others.
.SH "REPORTING BUGS"
Review: <https://github.com/espressif/esptool/#troubleshooting>
.br
Known issues: <https://github.com/espressif/esptool/issues>
.br
Report new issues at: <https://github.com/espressif/esptool/issues/new>
.SH COPYRIGHT
Copyright \(co 2014-2016 Fredrik Ahlberg, Angus Gratton, 
Espressif Systems (Shanghai) PTE LTD, other contributors as noted.
License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
.SH "SEE ALSO"
.PP
.BR esptool (1),
.BR espefuse (1),
.BR espsecure (1)