add zap for default logger

cmd/start.go

@@ -16,8 +16,6 @@ limitations under the License.
 package cmd
 
 import (
-	"fmt"
-	"log"
 	"os"
 	"os/signal"
 	"syscall"
@@ -70,8 +68,7 @@ func start() {
 	// and then notify the program that it can finish.
 	go func() {
 		sig := <-sigs
-		fmt.Println()
-		fmt.Println(sig)
+		l.Info(sig)
 		utils.ServerRunning = false
 		utils.StopSocketServer()
 		done <- true
@@ -80,27 +77,27 @@ func start() {
 	// The program will wait here until it gets the
 	// expected signal (as indicated by the goroutine
 	// above sending a value on `done`) and then exit.
-	fmt.Println("awaiting signal")
+	l.Info("awaiting signal")
 	_ = utils.InitDb(dbFile, dbInit)
 	go utils.Listen(socketAddress)
 	for utils.ServerRunning {
 		if !utils.IsPortOpen() {
-			log.Println("try to open port")
+			l.Info("try to open port")
 			err := utils.OpenPort(device, baudrate, bytesize, stopbits)
 			if err != nil {
-				log.Fatal("error in open serial port ", err)
+				l.Fatal("error in open serial port ", err)
 			}
-			log.Println("starting read")
+			l.Info("starting read")
 		}
 		buffer, count := utils.ReadPort()
 		if count > 0 {
 			if lograw {
-				log.Print(string(buffer))
+				l.Error(string(buffer))
 			}
 			utils.Append(buffer)
 		}
 	}
 	<-done
-	fmt.Println("exiting")
+	l.Info("exiting")
 
 }