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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.
@DrAzzy
Looks like it's outputting at RS232 levels - though I'm surprised the TX is at ground, i'd expect it to be at the same level as the RX when idle...
You need something like a MAX232 or equivilent to shift the voltage back into the range that can be safely interfaced with the Espruino.
Hopefully nothing was permanently damaged by hooking it up directly.