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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.
@migsanvi
@Gordon thanks for answering so quickly.
I am developing a project that will be connected by BLE continuously. That's why I need additional power to the CR2032. I will opt for MDBT42Q breakout board.