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/*
very fast ~~picket~~ physical transport
rip nautilus
long live the vfpt
thoughtless browser <-> serialport bridge
*/
// run at eval
var os = require('os');
var ifaces = os.networkInterfaces();
Object.keys(ifaces).forEach(function(ifname) {
var alias = 0;
ifaces[ifname].forEach(function(iface) {
if ('IPv4' !== iface.family || iface.internal !== false) {
// skip over internal (i.e. 127.0.0.1) and non-ipv4 addresses
return;
}
if (alias >= 1) {
// this single interface has multiple ipv4 addresses
console.log(ifname + ':' + alias, iface.address);
} else {
// this interface has only one ipv4 adress
console.log(ifname, iface.address);
}
++alias;
});
});
// COBS https://github.com/tcr/node-cobs
function encode (buf, zeroBack) {
var dest = [0];
// vfpt starts @ 1,
var code_ptr = 0;
var code = 0x01;
function finish (incllast) {
dest[code_ptr] = code;
code_ptr = dest.length;
incllast !== false && dest.push(0x00);
code = 0x01;
}
for (var i = 0; i < buf.length; i++) {
if (buf[i] == 0) {
finish();
} else {
dest.push(buf[i]);
code += 1;
if (code == 0xFF) {
finish();
}
}
}
finish(false);
if (zeroBack) {
dest.push(0x00);
}
return new Buffer.from(dest);
}
function decode (buf)
{
var dest = [];
for (var i = 0; i < buf.length; ) {
var code = buf[i++];
for (var j = 1; j < code; j++) {
dest.push(buf[i++]);
}
if (code < 0xFF && i < buf.length) {
dest.push(0);
}
}
return new Buffer.from(dest)
}
// wss, serport, etc
const WebSocketServer = require('ws').Server
const cobs = require('./cobs.js')
const SerialPort = require('serialport')
const Delimiter = require('@serialport/parser-delimiter')
let wsport = 2042
let WS = null
let pid = '8022'
let serport = null
let comname = ''
WSS = new WebSocketServer({
port: wsport
})
WSS.on('connection', ((ws) => {
console.log("ws connects")
WS = ws
WS.on('message', (buf) => {
// this should be a buffer
//console.log('WS receives: ', buf.length)
// no additional cases yet, just
if(serport){
let op = encode(buf, true)
//console.log("cobs -> ", op.length)
serport.write(op, 'utf8')
}
/*
switch(message[0]){
case 0:
// normal shit, cobs it onto the serial port
console.log("cobs", encode(message, true))
break;
case 252:
// the reset key
break;
default:
// an error state
console.log("ERR strange bytes at the VFPT, wyd?")
break;
}
*/
// we dont' want to do anything here, just wrip the buffer -> cobs
})
WS.on('end', () => {
this.log('WS CLOSED');
status.set('closed')
})
}))
let findSerialPort = () => {
let found = false
SerialPort.list((err, ports) => {
ports.forEach((serialport) => {
if (serialport.productId === pid) {
comname = serialport.comName
console.log(`found port at ${comname}, opening`)
openPort()
}
})
})
}
let openPort = () => {
serport = new SerialPort(comname, {
baudRate: 3000000
})
serport.on('open', () => {
serport.on('error', (err) => {
console.log('port error', err)
})
const parser = serport.pipe(new Delimiter({delimiter: [0]}))
parser.on('data', (buf) => {
// serialport doesn't guarantee packet sized events
//console.log('serport receives: ', buf)
let op = decode(buf)
if(op[0] === 252){
console.log('LLM: ', buf.toString('utf8'))
} else {
//console.log('<- de-cobs: ', op.length)
if(WS){
WS.send(op)
}
}
})
})
}
findSerialPort()
let reminders = () => {
setImmediate(reminders)
}
reminders()