susi-forge/src/gateway/backend/TemperatureController.js

SUSIs forge

var TemperatureController = {
    lastTemp: 0.0,
    notifyThreshold: 0.1,

    init: function(){
        var self = this;        
        susi.registerProcessor("demo::temperature::get", self.getTemp.bind(self));
        susi.registerConsumer("heartbeat::five",function(evt){
            susi.publish({
                topic: "demo::temperature::get"
            },function(res){
                log(JSON.stringify(res));
                var currentTemp = res.payload.temperature;
                if(currentTemp !== null && Math.abs(currentTemp-self.lastTemp) > self.notifyThreshold){
                    self.lastTemp = currentTemp;
                    susi.publish({
                        topic: "demo::temperature::update",
                        payload: {
                            temperature: currentTemp
                        }
                    });
                }
            });
        });
        log("Temperature-Controller init ready.");
    },

    getTemp: function(event){
        MainController.syscall('get-temperature',function(res){
            log(JSON.stringify(res));
            var stdout = res.payload.stdout;
            var arr = stdout.split("\r\n");
            var tempStr = arr[1];
            event.payload = {temperature: parseFloat(tempStr)};
            susi.ack(event);
        });
    }
};