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I've found a good solution to my problem. Just flash ESP8266 to standard ROM and put it into the garbage box. And then I've taken ESP-32 board and have no problem. Now I can make my first Espruino project. :)

Hi @Robin and @MaBe! I use Windows 8.1 based laptop.
I've downloaded firmware espruino_2v04_esp8266_4mb, runed command

esptool.py --port COM3 erase_flash

Success. Then I runed command:

esptool.py --port COM3 --baud 115200 write_flash --verify --flash_freq 40m --flash_mode qio --flash_size 4MB-c1 0x0000 "boot_v1.6.bin" 0x1000 espruino_esp8266_user1.bin 0x3FC000 esp_init_data_default.bin 0x37E000 blank.bin

According esptool everything is fine and flashing success and verifying is also success. After reset the board, i connected via putty and runed commands:

What does it means FLASH: 0? I can't use storage to put my own code? :(

Now I've tried to connect using WebIde and see the same error:

In settings => communication, Baud Rate is 115200.

I have the same problem and spent 2 days for solve it, but no results at all.
I tred

esptool.py --port COM3 --baud 115200 write_flash --flash_freq 80m --flash_size 4MB-c1 --flash_mode dio 0x0000 espruino_2v04_esp8266_4mb_combined_4096.­bin

and

esptool.py --port COM3 --baud 115200 write_flash --flash_freq 80m --flash_size 4MB --flash_mode dio 0x0000 espruino_2v04_esp8266_4mb_combined_4096.­bin

but have the same results.
Flashing Ok, Putty connection Ok, but WebIde connection is really bad. I have garbage text and error message :(

Board: 2AL3B-ESP-F (RoHS ESP-12N)
Baud rate was checked twice, I also tried to use ESP8266Flasher and FLASH_DOWNLOAD_TOOLS_V3.6.4 but the same result.