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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.
@Gordon
Looks like you only have two wires? You'd need to connect RX, TX and GND - it's the same for most busses (Serial, SPI, I2C, OneWire, etc)...
Thanks for attaching the picture though - it makes finding problems a lot easier :)