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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.
@Wilberforce
@ManoBiletsky
Yes upload the .bin files with esptool - like you did for the initial firmware.
The block depends on which esp8266 board you have - just do what you did last time...
As far as code changes - you will need to initialize the spi to however you have wired up the sd card.