Arduino IDE 1.8.1 error compiling anything for esp32

[hicotton02]

followed the directions (today) here:
https://github.com/espressif/arduino-esp32/blob/master/doc/windows.md

and tried to verify/compile a range of basic sketches. all throw the same error. I am using the ESP32 Thing by sparkfun.

One variance is that I had to manually install the requests module for python before i could run python get.py

Error:
Arduino: 1.8.1 (Windows 10), Board: "ESP32 Dev Module, 80MHz, 921600"

C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -hardware C:\Users\skaz\Documents\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\skaz\Documents\Arduino\libraries -fqbn=espressif:esp32:esp32:FlashFreq=80,UploadSpeed=921600 -ide-version=10801 -build-path C:\Users\skaz\AppData\Local\Temp\arduino_build_893527 -warnings=none -prefs=build.warn_data_percentage=75 -verbose C:\Users\skaz\Documents\Arduino\Brewing_Controller\Brewing_Controller.ino
C:\Program Files (x86)\Arduino\arduino-builder -compile -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -hardware C:\Users\skaz\Documents\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\skaz\Documents\Arduino\libraries -fqbn=espressif:esp32:esp32:FlashFreq=80,UploadSpeed=921600 -ide-version=10801 -build-path C:\Users\skaz\AppData\Local\Temp\arduino_build_893527 -warnings=none -prefs=build.warn_data_percentage=75 -verbose C:\Users\skaz\Documents\Arduino\Brewing_Controller\Brewing_Controller.ino
Using board 'esp32' from platform in folder: C:\Users\skaz\Documents\Arduino\hardware\espressif\esp32
Using core 'esp32' from platform in folder: C:\Users\skaz\Documents\Arduino\hardware\espressif\esp32
Detecting libraries used...
"C:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/xtensa-esp32-elf/bin/xtensa-esp32-elf-g++" -DESP_PLATFORM -DMBEDTLS_CONFIG_FILE='"mbedtls/esp_config.h"' -DHAVE_CONFIG_H "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/config" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/bt" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/driver" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/esp32" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/ethernet" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/fatfs" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/freertos" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/log" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/mdns" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/vfs" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/ulp" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/newlib" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/nvs_flash" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/spi_flash" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/sdmmc" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/openssl" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/app_update" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/tcpip_adapter" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/xtensa-debug-module" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/newlib" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/coap" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/wpa_supplicant" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/expat" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/json" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/mbedtls" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/nghttp" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/lwip" -std=gnu++11 -fno-exceptions -fno-rtti -Os -g3 -Wpointer-arith -ffunction-sections -fdata-sections -fstrict-volatile-bitfields -mlongcalls -nostdlib -w -Wno-error=unused-function -Wno-error=unused-but-set-variable -Wno-error=unused-variable -Wno-error=deprecated-declarations -Wno-unused-parameter -Wno-sign-compare -fno-rtti -c -w -x c++ -E -CC -DF_CPU=240000000L -DARDUINO=10801 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 -DESP32 "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32\cores\esp32" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32\variants\esp32" "C:\Users\skaz\AppData\Local\Temp\arduino_build_893527\sketch\Brewing_Controller.ino.cpp" -o "nul"
Generating function prototypes...
"C:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/xtensa-esp32-elf/bin/xtensa-esp32-elf-g++" -DESP_PLATFORM -DMBEDTLS_CONFIG_FILE='"mbedtls/esp_config.h"' -DHAVE_CONFIG_H "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/config" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/bt" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/driver" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/esp32" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/ethernet" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/fatfs" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/freertos" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/log" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/mdns" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/vfs" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/ulp" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/newlib" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/nvs_flash" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/spi_flash" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/sdmmc" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/openssl" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/app_update" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/tcpip_adapter" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/xtensa-debug-module" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/newlib" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/coap" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/wpa_supplicant" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/expat" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/json" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/mbedtls" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/nghttp" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/lwip" -std=gnu++11 -fno-exceptions -fno-rtti -Os -g3 -Wpointer-arith -ffunction-sections -fdata-sections -fstrict-volatile-bitfields -mlongcalls -nostdlib -w -Wno-error=unused-function -Wno-error=unused-but-set-variable -Wno-error=unused-variable -Wno-error=deprecated-declarations -Wno-unused-parameter -Wno-sign-compare -fno-rtti -c -w -x c++ -E -CC -DF_CPU=240000000L -DARDUINO=10801 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 -DESP32 "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32\cores\esp32" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32\variants\esp32" "C:\Users\skaz\AppData\Local\Temp\arduino_build_893527\sketch\Brewing_Controller.ino.cpp" -o "C:\Users\skaz\AppData\Local\Temp\arduino_build_893527\preproc\ctags_target_for_gcc_minus_e.cpp"
exit status -1073741515
Error compiling for board ESP32 Dev Module.

[hoopsurfer]

+1
Arduino: 1.8.1 (Windows Store 1.8.1.0) (Windows 10), Board: "ESP32 Dev Module, 80MHz, 921600"
...
exit status -1073741515
Error compiling for board ESP32 Dev Module.

[me-no-dev]

please rerun tools/get.py to get an updated toolchain. And please report if that fixed it :)

[hicotton02]

reran the command and same error.

[hicotton02]

took it a step further and deleted everything reran whole setup:

`$ mkdir -p ~/Documents/Arduino/hardware/espressif && \

cd ~/Documents/Arduino/hardware/espressif &&
git clone https://github.com/espressif/arduino-esp32.git esp32 &&
cd esp32/tools/ &&
python get.py
Cloning into 'esp32'...
remote: Counting objects: 2529, done.
remote: Compressing objects: 100% (195/195), done.
remote: Total 2529 (delta 22), reused 0 (delta 0), pack-reused 2315
Receiving objects: 100% (2529/2529), 49.21 MiB | 15.67 MiB/s, done.
Resolving deltas: 100% (937/937), done.
Checking out files: 100% (884/884), done.
Platform: i686-mingw32
Downloading xtensa-esp32-elf-win32-1.22.0-61-gab8375a-5.2.0.zip
Done
Extracting dist/xtensa-esp32-elf-win32-1.22.0-61-gab8375a-5.2.0.zip`

Error:

`Arduino: 1.8.1 (Windows 10), Board: "ESP32 Dev Module, 80MHz, 921600"

C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -hardware C:\Users\skaz\Documents\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\skaz\Documents\Arduino\libraries -fqbn=espressif:esp32:esp32:FlashFreq=80,UploadSpeed=921600 -ide-version=10801 -build-path C:\Users\skaz\AppData\Local\Temp\arduino_build_534755 -warnings=none -prefs=build.warn_data_percentage=75 -verbose C:\Users\skaz\Documents\Arduino\Brewing_Controller\Brewing_Controller.ino
C:\Program Files (x86)\Arduino\arduino-builder -compile -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -hardware C:\Users\skaz\Documents\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\skaz\Documents\Arduino\libraries -fqbn=espressif:esp32:esp32:FlashFreq=80,UploadSpeed=921600 -ide-version=10801 -build-path C:\Users\skaz\AppData\Local\Temp\arduino_build_534755 -warnings=none -prefs=build.warn_data_percentage=75 -verbose C:\Users\skaz\Documents\Arduino\Brewing_Controller\Brewing_Controller.ino
Using board 'esp32' from platform in folder: C:\Users\skaz\Documents\Arduino\hardware\espressif\esp32
Using core 'esp32' from platform in folder: C:\Users\skaz\Documents\Arduino\hardware\espressif\esp32
Detecting libraries used...
"C:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/xtensa-esp32-elf/bin/xtensa-esp32-elf-g++" -DESP_PLATFORM -DMBEDTLS_CONFIG_FILE='"mbedtls/esp_config.h"' -DHAVE_CONFIG_H "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/config" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/bt" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/driver" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/esp32" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/ethernet" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/fatfs" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/freertos" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/log" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/mdns" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/vfs" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/ulp" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/newlib" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/nvs_flash" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/spi_flash" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/sdmmc" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/openssl" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/app_update" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/tcpip_adapter" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/xtensa-debug-module" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/newlib" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/coap" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/wpa_supplicant" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/expat" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/json" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/mbedtls" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/nghttp" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/lwip" -std=gnu++11 -fno-exceptions -fno-rtti -Os -g3 -Wpointer-arith -ffunction-sections -fdata-sections -fstrict-volatile-bitfields -mlongcalls -nostdlib -w -Wno-error=unused-function -Wno-error=unused-but-set-variable -Wno-error=unused-variable -Wno-error=deprecated-declarations -Wno-unused-parameter -Wno-sign-compare -fno-rtti -c -w -x c++ -E -CC -DF_CPU=240000000L -DARDUINO=10801 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 -DESP32 "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32\cores\esp32" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32\variants\esp32" "C:\Users\skaz\AppData\Local\Temp\arduino_build_534755\sketch\Brewing_Controller.ino.cpp" -o "nul"
Generating function prototypes...
"C:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/xtensa-esp32-elf/bin/xtensa-esp32-elf-g++" -DESP_PLATFORM -DMBEDTLS_CONFIG_FILE='"mbedtls/esp_config.h"' -DHAVE_CONFIG_H "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/config" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/bt" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/driver" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/esp32" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/ethernet" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/fatfs" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/freertos" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/log" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/mdns" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/vfs" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/ulp" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/newlib" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/nvs_flash" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/spi_flash" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/sdmmc" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/openssl" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/app_update" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/tcpip_adapter" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/xtensa-debug-module" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/newlib" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/coap" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/wpa_supplicant" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/expat" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/json" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/mbedtls" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/nghttp" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32/tools/sdk/include/lwip" -std=gnu++11 -fno-exceptions -fno-rtti -Os -g3 -Wpointer-arith -ffunction-sections -fdata-sections -fstrict-volatile-bitfields -mlongcalls -nostdlib -w -Wno-error=unused-function -Wno-error=unused-but-set-variable -Wno-error=unused-variable -Wno-error=deprecated-declarations -Wno-unused-parameter -Wno-sign-compare -fno-rtti -c -w -x c++ -E -CC -DF_CPU=240000000L -DARDUINO=10801 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 -DESP32 "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32\cores\esp32" "-IC:\Users\skaz\Documents\Arduino\hardware\espressif\esp32\variants\esp32" "C:\Users\skaz\AppData\Local\Temp\arduino_build_534755\sketch\Brewing_Controller.ino.cpp" -o "C:\Users\skaz\AppData\Local\Temp\arduino_build_534755\preproc\ctags_target_for_gcc_minus_e.cpp"
exit status -1073741515
Error compiling for board ESP32 Dev Module.`

[hoopsurfer]

+1 Cleaned, Rebooted, Reran:
Cloning into 'esp32'...
remote: Counting objects: 2529, done.
remote: Compressing objects: 100% (195/195), done.
remote: Total 2529 (delta 22), reused 0 (delta 0), pack-reused 2315
Receiving objects: 100% (2529/2529), 49.21 MiB | 4.25 MiB/s, done.
Resolving deltas: 100% (937/937), done.
Checking out files: 100% (884/884), done.
Platform: i686-mingw32
Downloading xtensa-esp32-elf-win32-1.22.0-61-gab8375a-5.2.0.zip
Done
Extracting dist/xtensa-esp32-elf-win32-1.22.0-61-gab8375a-5.2.0.zip
...
exit status -1073741515
Error compiling for board ESP32 Dev Module.

[me-no-dev]

seems that I need to test this on Windows.. maybe the new toolchain or something. no issues on a Mac.

[hicotton02]

let me know if there is something i can help with. note all my installs are 64 bit. (Arduino, Python, etc)

[aaron-neal]

+1, just received the module and have the same error message. (Win 10, X64. Arduino 1.6.10 hourly Build)

[tolson2000]

Confirmed to work OK with Arduino 1.8.1 on Linux SuSE 13.2.

[me-no-dev]

you windows guys can try the old toolchain from here and please do report if working

[me-no-dev]

if it complains about missing impure_ptr, add this to your sketch:

void *operator new(size_t size)
{
    return malloc(size);
}

void *operator new[](size_t size)
{
    return malloc(size);
}

void operator delete(void * ptr)
{
    free(ptr);
}

void operator delete[](void * ptr)
{
    free(ptr);
}

extern "C" void __cxa_pure_virtual(void) __attribute__ ((__noreturn__));
extern "C" void __cxa_deleted_virtual(void) __attribute__ ((__noreturn__));

void __cxa_pure_virtual(void)
{
    abort();
}

void __cxa_deleted_virtual(void)
{
    abort();
}

[SpawnY0815]

Last two posts solves my problem on Windows 10 64bit, Arduino IDE 1.8.1 64bit and python 2.7.12 64bit

thx me-no-dev

[robertwatsonbath]

Older toolchain and and impure_ptr fix works for me too (Win 7 64bit, Arduino 1.8.0, python 2.7.12)
Thanks me-no-dev.

[hicotton02]

confirmed. with the impure_ptr fix.

[hoopsurfer]

+1 works with older toolchain and required impure_ptr fix. Also I had to hold button to download after 10 attempts. Seems esp_tool.py may be more touchy connecting to dev module than in the past.
Arduino: 1.8.1 (Windows Store 1.8.1.0) (Windows 10), Board: "ESP32 Dev Module, 80MHz, 921600", Python 2.7.13 (with added pip install requests)