gistfile1.js

app.post('/detect', function (req, res) {
    // ...

    if(alarmArmed){
        intrusion = 1;
        alarmArmed = false;
    }

    // ...
});

function dispatchInfos(){
    // ....

    currentSocket.emit('status', {
        // ...
        intrusion: intrusion
    });

    //...
    intrusion = 0;
}