gh-10 Background updates for data

enervent-ctrl-go/main.go

@@ -64,5 +64,6 @@ func main() {
 	log.Println("enervent-ctrl version", version)
 	pingvin = pingvinKL.New()
 	pingvin.Update()
+	go pingvin.Monitor(15)
 	listen()
 }

enervent-ctrl-go/pingvinKL/pingvinKL.go

@@ -272,6 +272,13 @@ func (p *PingvinKL) populateStatus() {
 	json.NewEncoder(log.Writer()).Encode(p.Status)
 }
 
+func (p *PingvinKL) Monitor(interval int) {
+	for {
+		time.Sleep(time.Duration(interval) * time.Second)
+		p.Update()
+	}
+}
+
 // create a PingvinKL struct, read coils and registers from CSVs
 func New() PingvinKL {
 	pingvin := PingvinKL{}