esptool-ck

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esptool is a tool to allow the creation of firmware files suitable for the ESP8266 chip, and flashing those file to the chip.

esptool runs on Windows, Linux and Mac OS X.

It can read a code file in the ELF format that the compilers produce. From there it is possible to extract various sections that are present in these files, to either directly dump a section to a file or to assemble a firmware file comprised of several segments.

While the codebase implements many functions, only a few are used by the program currently. The program interprets the arguments given on the commandline, and in the order they are given.

The following commands are currently available:

-eo Opens an ELF object file, parses it and caches some of the information found therein. Only works if there is no ELF file currently opened.

-d

-ec Closes the currently opened ELF file

-bo Prepares an firmware file in the format that is understood by the ESP chip. Only works if an ELF file is opened, and if no firmware file is prepared yet. The result of the operations done on there firmware image are saved when the it is finally closed.

-bs

-bc Closes the firmware image and saves the result as file to disk.

-v Increase verbosity level of the tool Add more v's to increase it more, e.g. -vv, -vvv.

-q Disable most of the output.

-cp Select the serial port device to use for communicating with the ESP. Default is /dev/ttyUSB0 on Linux, COM1 on Windows, /dev/tty.usbserial on Mac OS X.

-cd Select the reset method to use for resetting the board. Currently supported methods are:

    none            No DTR/RTS manipulation

    ck              RTS controls RESET or CH_PD, DTR controls GPIO0

    wifio           DTR controls GPIO0 via PNP transistor and RESET
                    via a capacitor

-cb Select the baudrate to use, default is 115200

-ca