I just finished adding a new simple feature to control the away status for a structure to my unofficial-nest-api published on GitHub and available as a node package (npm).

Usage is simple as calling setAway or setHome on the nest instance after authentication and a successful status has been returned (see commented calls below).

[javascript]
if (username && password) {
username = trimQuotes(username);
password = trimQuotes(password);
nest.login(username, password, function (data) {
if (!data) {
console.log(‘Login failed.’);
process.exit(1);
return;
}
console.log(‘Logged in.’);
nest.fetchStatus(function (data) {
for (var deviceId in data.device) {
if (data.device.hasOwnProperty(deviceId)) {
var device = data.shared[deviceId];
console.log(util.format("%s [%s], Current temperature = %d F target=%d",
device.name, deviceId,
nest.ctof(device.current_temperature),
nest.ctof(device.target_temperature)));
}
}
subscribe();
//nest.setAway();
//nest.setHome();
});
});
}
[/javascript]