suppress error logging when continuous

main.go

@@ -55,8 +55,24 @@ var (
 		Name:      "temp_nozzle",
 		Help:      "Temperature, in celsius, of the print nozzle",
 	})
+	errCount = 0
 )
 
+func errLog(err error) {
+	errCount++
+	// reset metrics
+	opsFlowFactor.Set(0)
+	opsPrintSpeed.Set(0)
+	opsZPosition.Set(0)
+	opsBed.Set(0)
+	opsNozzle.Set(0)
+	if errCount > 5 {
+		log.Printf("suppressing further error logging")
+		return
+	}
+	log.Printf("error retrieving telemetry: %v", err)
+}
+
 func recordMetrics(ctx context.Context, config Config) {
 	go func() {
 		for {
@@ -68,20 +84,21 @@ func recordMetrics(ctx context.Context, config Config) {
 				time.Sleep(time.Second * time.Duration(config.QueryInterval))
 				res, err := http.Get(config.QueryHostname + "/api/telemetry")
 				if err != nil {
-					log.Printf("error retrieving telemetry: %v", err)
+					errLog(err)
 					break
 				}
 				b, err := io.ReadAll(res.Body)
 				if err != nil {
-					log.Printf("error retrieving telemetry: %v", err)
+					errLog(err)
 					break
 				}
 				t := &Metrics{}
 				err = json.Unmarshal(b, t)
 				if err != nil {
-					log.Printf("error parsing telemetry: %v", err)
+					errLog(err)
 					break
 				}
+				errCount = 0
 				opsFlowFactor.Set(float64(t.FlowFactor))
 				opsPrintSpeed.Set(float64(t.PrintingSpeed))
 				opsZPosition.Set(t.ZPosition)