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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.
@Nadnerb
The problem with this approach is that the data is a 30kB hex file, its not something I can easily type into the console on the Web IDE. However I think I may have found a solution, by uploading this data with the firmware hex file I could write it to the Espruino's flash directly.
I can then use the nRF toolbox app to write this modified firmware to the nRF chip.