Log tessel2 boot in a sane way.

t2_log_boot.js

// Because "hit enter as fast as you can"

/*
  1. Requires serialport module (npm install serialport)
  2. Run with node (node t2_log_boot.js)
  3. Plug in tessel2.
*/

/* Figure out what port your tessel2 is plugged into and update the SERIAL_PORT variable. */
const SERIAL_PORT = '/dev/cu.usbmodem1412';


const SerialPort = require("serialport");
const port = new SerialPort(SERIAL_PORT, { autoOpen: false, parser: SerialPort.parsers.readline('\n') });
port.on('open', function() {
  console.log(`Connected to ${SERIAL_PORT}`);
});
port.on('error', function(err) {
  console.log('ERROR: ' + err.message);
});
port.on('disconnect', function(err) {
  console.log('DISCONNECT: ' + err.message);
});
port.on('close', function() {
  console.log('CONNECTION CLOSED');
  retry();
});
port.on('data', function(data) {
  console.log(data)
});

function retry(){
  setTimeout(start, 250);
}
function start() {
  port.open(function (err) {
    if (err) {
      console.log('OPEN ERROR: ' + err.message);
      return retry();
    }
  });
}
start();