Flashing

Generate a new Custom Build at:

https://nodemcu-build.com/

Mode is:

qio for most ESP8266 ESP-01/07 (512 kByte modules)
dio for most ESP32 and ESP8266 ESP-12 (>=4 MByte modules)

Erase & Write the new file to Flash:

esptool.py --port /dev/ttyUSB0 erase_flash
esptool.py --port /dev/ttyUSB0 write_flash -fm dio 0x00000 nodemcu-master-10-modules-2018-07-23-17-30-48-float.bin

References

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