I think it's micro:bit 2 most likely :) micro:bit 2 is an nRF52833
@Gordon started
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.
I think it's micro:bit 2 most likely :) micro:bit 2 is an nRF52833