How to flash Espruino esp8266

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*** Flash Tool

Windows, Linux and MacOSX:

esptool.py - serial flash tool

https://github.com/themadinventor/esptool

Linux and MacOSX:

wififlash.sh - script to update flash espruino via wifi for 4MB esp8266 (e.g. esp-12)

./scripts/wiflash <esp8266 hostname or ip>:88 espruino_esp8266_user1.bin espruino_esp8266_user2.bin

*** Erase flash before updating to a new version

esptool.py --port [/dev/ttyUSB0|COM1] --baud 115200 erase_flash

espruino_<version>_esp8266

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*** To flash a 512KB esp8266 (e.g. esp-01) using the serial port use:

esptool.py --port [/dev/ttyUSB0|COM1] --baud 115200 write_flash \

--flash_freq 40m --flash_mode qio --flash_size 4m \

0x0000 "boot_v1.6.bin" 0x1000 espruino_esp8266_user1.bin \

0x7C000 esp_init_data_default.bin 0x7E000 blank.bin

For 1MB flash use 0xFC000/0xFE000 and for 2MB flash use 0x1FC000/0x1FE000 on the last line.

*** To flash a 4MB esp8266 (e.g. esp-12) using the serial port use:

esptool.py --port [/dev/ttyUSB0|COM1] --baud 115200 write_flash \

--flash_freq 80m --flash_mode qio --flash_size 32m \

0x0000 "boot_v1.6.bin" 0x1000 espruino_esp8266_user1.bin \

0x3FC000 esp_init_data_default.bin 0x3FE000 blank.bin

espruino_<version>_esp8266_4MB

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*** To flash a 4MB eps866 with Flash map 4MB:1024/1024 (BOARD=ESP8266_4MB)

esptool.py --port [/dev/ttyUSB0|COM1] --baud 460800 write_flash \

--flash_freq 80m --flash_mode qio --flash_size 4MB-c1 \

0x0000 "boot_v1.6.bin" 0x1000 espruino_esp8266_user1.bin \

0x3FC000 esp_init_data_default.bin 0x3FE000 blank.bin

Special hints for a broken device after flashing

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newer ESP01 like ESP01s have 1MB flash size

try different --flash_mode values like dio or dout

try to use a combined file to flash like

espruino_..._combined_512.bin or

espruino_..._combined_4096.bin