From 660f2c6c421f3dbd9d1be29775d7da589fa76b88 Mon Sep 17 00:00:00 2001
From: andig <cpuidle@gmx.de>
Date: Tue, 13 Aug 2024 17:21:12 +0200
Subject: [PATCH] Modbus: mimic mbmd

---
 util/modbus/log.go | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/util/modbus/log.go b/util/modbus/log.go
index 589c2615a..08043e7cd 100644
--- a/util/modbus/log.go
+++ b/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()
 }