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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
Why you think lower serial baud rate saves power? I'd guess the opposite as the communication takes longer so less time to sleep for nrf52 chip. Also the serial itself draws some power when enabled so Serial.unsetup() with setTimeout timed to wake up just before next NMEA sequence comes + Serial1.setup() may save some insignificant power (0.5-1mA). GPS draws much more (10-25mA?)