Aprs checkin via Yo and hook.io

aprs_hook.js

// This is designed to run on hook.io but you could probably customize it

module['exports'] = function yo_aprs (hook) {

var request = require('request');
//var numeral = require('numeral');
  
// IF you want to use this, change this
if ( hook.params["username"] != "KEISISQRL" ) {
  console.log("bad user");
  hook.res.end("nah go away");
  return false;
}
  


var yo_location = hook.params["location"];
  
if ( !yo_location ) {
  console.log("no loc");
  hook.res.end("no location");
  return false;
}
  
console.log(yo_location);
// change this
var callsign = "N0NE";

var ssid = 10;
// and this
var passcode = -1;

var symbol = ["/","$"];

var login_line = "user " + callsign + "-YO pass " + passcode + " vers YoPRS 0.42";

var yo_latlong = yo_location.split(';');
  
var yo_lat_f = parseFloat(yo_latlong[0]);
 
var yo_long_f = parseFloat(yo_latlong[1]);
  
var lat_dir, long_dir;
  
//Set direction and get abs
if (yo_lat_f < 0) {
    lat_dir = "S";
}else{
    lat_dir = "N";
}

yo_lat_f = Math.abs(yo_lat_f);

if (yo_long_f < 0) {
    long_dir = "W";
}else{
    long_dir = "E";
}

yo_long_f = Math.abs(yo_long_f);

var yo_lat_deg = Math.floor(yo_lat_f);

var yo_long_deg = Math.floor(yo_long_f);

var yo_lat = (yo_lat_deg * 100 + (yo_lat_f % 1 * 60)).toFixed(2);

var yo_long = (yo_long_deg * 100 + (yo_long_f % 1 * 60)).toFixed(2);

var lat_pad = "", long_pad = "", lat_after = "", long_after = "";

// Set needed padding (I hate Javascript, where's my damn sprintf)

if (yo_lat < 1000) {
    lat_pad = "0";
}

if (yo_long < 1000) {
    long_pad = "00";
} else if (yo_long < 10000) {
    long_pad = "0";
}
  
if (yo_lat % 1 == 0) {
  lat_after = ".00";
}else if (yo_lat % .1 == 0) {
  lat_after = "0";
}
 
if (yo_long % 1 == 0) {
  long_after = ".00";
}else if (yo_long % .1 == 0) {
  long_after = "0";
}  

// Format the AX.25 packet

// var ax25 = callsign + "-" + ssid + ">APX042,TCPIP*:!" + numeral(yo_lat).format("0000.00") + lat_dir + symbol[0] + numeral(yo_long).format("00000.00") + long_dir + symbol[1] + " checkin via Yo";
var ax25 = callsign + "-" + ssid + ">APX042,TCPIP*:!" + lat_pad + yo_lat + lat_after + lat_dir + symbol[0] + long_pad + yo_long + long_after + long_dir + symbol[1] + " checkin via Yo";


  
var to_send = login_line + "\n" + ax25;

// send the thing to the thing
request({
  method: 'POST',
  uri: 'http://srvr.aprs-is.net:8080/',
  headers: {
    'Accept-Type': 'text/plain',
    'Content-Type': 'application/octet-stream',
    'Content-Length': to_send.length
  },
  body: to_send},
       function (e,r,b) { console.log("request done"); hook.res.end("cool"); });

// Ultimately unnecessary but y'know nice for debugging I thought
console.log("Submitted: " + to_send);
};

The string you call ax25 is more commonly known as tnc2 format. AX.25 is the format used to modulate the data over FM.