Push a message to all devices in all client apps of the associated project

var message = {
  alert: "hello from FH"
}, options = {
    broadcast: true
};

$fh.push(message, options,
  function (err, res) {
    if (err) {
      console.log(err.toString());
    } else {
      console.log("status : " + res.status);
    }
  });

Push a message for specific deviceType in a specific client app

var message = {
  alert: "hello from FH"
},
  options = {
    apps: ["3uzl1ebi6utciy56majgqlj8"], // list of App IDs
    criteria: {
      deviceType: "android"
    }
  };
$fh.push(message, options,
  function (err, res) {
    if (err) {
      console.log(err.toString());
    } else {
      console.log("status : " + res.status);
    }
  });