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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.
@TomWS
I purchased an MDBT42Q Espruino board, but I believe the board has some failed solder joints - it randomly lights up the red LED if I move the board slightly and I'm getting random results from basic code running on it.
I want to compare with an MDBT42Q Breakout board I have, but to load the identical software, I need to know which DFU bootloader the original has. I have the nRF52 SDK (version 15.2.0) and J-Link so loading the Softdevice and app is not a problem. However, the SDK has three different DFU bootloaders and I don't know which one the board requires.