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README.md

Use firmware 1.5.1 ONLY: https://github.com/nodemcu/nodemcu-firmware/issues/719

OSX ESP firmware build notes

error: unknown type name 'ptrdiff_t' when installing pass-2 core C compiler.

Solution: https://github.com/pfalcon/esp-open-sdk/issues/45 delete define/endef statements

Relevant output

Xtensa toolchain is built, to use it:

export PATH=/Users/aria/code/espbuild/esp-open-sdk/xtensa-lx106-elf/bin:$PATH

Espressif ESP8266 SDK is installed. Toolchain contains only Open Source components To link external proprietary libraries add:

xtensa-lx106-elf-gcc -I/Users/aria/code/espbuild/esp-open-sdk/sdk/include -L/Users/aria/code/espbuild/esp-open-sdk/sdk/lib

Flashing

/Users/aria/code/espbuild/esp-open-sdk/esptool

python esptool.py -p /dev/tty.SLAB_USBtoUART write_flash 0x00 /opt/Espressif/nodemcu-firmware/bin/0x00000.bin etc

other notes

Building with default modules + debug causes luatool to fail with 'stdin:1: attempt to call field 'open' (a nil value)' since it seems file.open isn't defined. Rebuilt with fewer modules + debug and file upload seems to work fine. Did the build... just run out of space and truncate the image?