testGPS.js

"use strict";

/**
 * Nov 2020, problem reading the serial ports...
 * See the README.md for workaround.
 */
console.log('To stop: Ctrl-C, or enter "quit" + [return] here in the console');
console.log("Usage: node " + __filename + " [raw]|fmt|auto");

global.displayMode = "raw";

if (process.argv.length > 2) {
  if (process.argv[2] === 'fmt') {
    global.displayMode = "fmt";
  } else if (process.argv[2] === 'auto') {
    global.displayMode = "auto";
  }
}

let util = require('util');
let GPS = require('./SerialReader.js').NMEA;

// let serialPort = '/dev/tty.usbserial'; // On Mac
let serialPort = '/dev/ttyS80'; // On Linux (including Raspberry)
let gps = new GPS(serialPort, 4800);
// var gps = new GPS();

if (global.displayMode === 'fmt') {
  gps.onPosition = function(pos) {
    console.log("Position:", pos);
  };
  gps.onTime = function(epoch) {
    console.log("Time: " + new Date(epoch));
  };
}
let exit = () => {
  gps.exit();
  process.stdin.pause();
};

process.on('SIGINT', exit); // Ctrl C
process.stdin.resume();
process.stdin.setEncoding('utf8');

process.stdin.on('data', function (text) {
//console.log('received data:', util.inspect(text));
  if (text.startsWith('quit')) {
    done();
  }
});

let done = () => {
  console.log("Bye now!");
  exit();
  process.exit();
};