fix: sync and fetch temperatures

changes:
- add sync command to synchronize device sensor information with remote
  servers
- fix fetch functions to get temperatures

cmd/config/config.go

@@ -10,6 +10,7 @@ var configDir string
 var configCmd = &cobra.Command{
 	Use:   "config",
 	Short: "Manage Configuration",
+	Args:  cobra.ExactArgs(2),
 	Run: func(cmd *cobra.Command, args []string) {
 		if args[0] == "device.name" {
 			config.DeviceName(args[1], configDir)