Hi, Rudi! Thanks for comprehensive reply :) your output to the app folder looks good. so only the bin files are missed.. first, have you test a simple arduino board with your arduino ide installation? can you compile, can you upload to a arduino board ? example simly blinky... check: compile ok chec...

I have shown all the output errors from arduino. There isn't 'C:\\Users\\alser\\AppData\\Local\\Temp\\build6568377402732073801.tmp/esp32blink3.cpp.elf.0x04000.bin' file in 'C:\\Users\\alser\\AppData\\Local\\Temp\\build6568377402732073801.tmp/' directory. There are esp32blink3.cpp , esp32blink3.cpp.d...

Now I can compile blink.ino . Thanks a lot. But when I try to uplod I see: Global variables use 49 044 bytes (59%) of dynamic memory, leaving 32 876 bytes for local variables. Maximum is 81 920 bytes. Connecting... Erasing flash... Erase size 1800 num_blocks 6 offset 0 FLASH_BEGIN failed, applying E...

I created Espressif folder and moved ESP31B directory to it as you recommend. Restarted Arduino. Nothing changed
Maybe I shoud install another copy of Arduino (without ESP8266) and repeat your recomendation? Is it possible to have insalled two copy of Arduino?

I am interested in Arduino Environment too. I have ESP31B module. It works. I have Arduino 1.6.5 and https://github.com/esp8266/Arduino installed on my Windows 64bit OS. It works too. I have Windows 64 Toolchain: http://static.ficeto.com/xtensa-esp108-elf-cygwin64.zip , https://cygwin.com/setup-x86_...