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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.
@BootySnorkeler
Hey what's up,
Will I hurt my MDBT42Q module by connecting a coin cell battery in parallel with a USB jack(or any other connector really, like a JST) for optional external power? Will it hurt the battery? I've attached a simple diagram to further clarify what I mean.
The coin cell is a 3V CR1225 cell and the external power connector will be a similar 3.3v power source.
EDIT: the external power connector will also handle data transfer through the RX/TX lines.
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