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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@jhfoo
The warning on the last line is the red herring. My nodemcu uses the ESP-12 model and I should be loading the firmware with this string:
esptool.py --port COM3 --baud 460800 write_flash --flash_freq 80m --flash_mode qio --flash_size 32m 0x0000 "boot_v1.4(b1).bin" 0x1000 espruino_esp8266_user1.bin 0x37E000 blank.bin
Thanks SpenceKonde for your confirmation on IRC