Soy nuevo en el script de hueso, estoy tratando de abrir el puerto USB en serie pero recibo un error, aquí he pegado mi código, verifique y verifique el código, donde estoy cometiendo errores.

 var b = require('bonescript'); var port1='/dev/ttyUSB0'; var port2='/dev/ttyUSB2'; var options={ baudrate: 9600, parity: 'even', // parser: b.serialParsers.readline("\n") }; console.log(b.serialOpen(port1, options, onSerial1));// open port 1 console.log(b.serialOpen(port2, options, onSerial2));//open port 2 b.serialWrite(port1,'A');//start letter bouncing function onSerial1(x){ if (x.event == 'data') { console.log(x.data); var char =x.data;//get letter if(char=='Z') char='A';// reset or incremet else char++; b.serialWrite(port2,char); } } function onSerial2(x){ if (x.event == 'data') { console.log(x.data); var char =x.data; if(char=='Z') char='A'; else char+=1; b.serialWrite(port1,char); } } And I am getting error as follow

 /usr/local/lib/node_modules/bonescript/src/serial.js:16 if (m.ports[args.port].path) path = m.ports[args.port].path; ^ TypeError: Cannot read property 'path' of undefined at Object.m.doOpen (/usr/local/lib/node_modules/bonescript/src/serial.js:16:28) Waiting for the debugger to disconnect...