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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.
@Alexander
The esp8266 has two UARTS. UART0 (Serial1) uses gpio1 for TX and gpio3 for RX and is used by the Espruino JavaScript console. It can be used for other things once the Espruino console is moved to another device. For instance calling LoopbackA.setConsole() will move the console to 'loopback' (where is can be accessed using LoopbackB), and will free up Serial1 for use like any normal Espruino Serial port.
And no problems.