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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.
@fanoush
It will switch to input mode, try with pin.getMode() to see after calling digitalRead.
Also there is now no explicit mode name to set it to be disconnected/floating again (e.g. like pin.mode("disconnected")). on nrf52 devices analogRead does that. In fact floating pins on nrf52 are reported as "analog" (even for pins 4-27 that cannot be used for analog reading) and pin.mode("analog") seems to set it floating/disconnected - at least on nrf52 platform.