Modbus: mimic mbmd

util/modbus/log.go

@@ -2,6 +2,7 @@ package modbus
 
 import (
 	"sync"
+	"time"
 
 	"github.com/grid-x/modbus"
 	"github.com/volkszaehler/mbmd/meters"
@@ -16,7 +17,12 @@ func (l *logger) WithLogger(logger modbus.Logger, fun func() ([]byte, error)) ([
 	l.mu.Lock()
 	defer l.mu.Unlock()
 
-	l.logger = logger
+	if l.logger != logger {
+		// small delay when switching logger/ slave id to mimic mbmd behavior
+		time.Sleep(10 * time.Millisecond)
+		l.logger = logger
+	}
+
 	return fun()
 }