"Serial1.on('data', function (data) {......" not works for me, is works for any other ??

Wow, ok - sorry everyone (especially @MaBe for thinking this was just ESP8266 specific).

Thanks @Frida for pointing this out - it's the jsvConfigObject - we define stopbits/etc as JSV_INTEGER, which assumes 32 bits - so the code that scans the serial initialisation object writes past where it should.

I'll commit a fix for this in the next hour or so - and I'll check out the other config object uses in case there are other similar issues elsewhere.