From 96fc4933dc4467c319ebfc538f9eccdfaa5816af Mon Sep 17 00:00:00 2001
From: Christofer Dutz <cdutz@apache.org>
Date: Wed, 18 Sep 2024 15:20:17 +0200
Subject: [PATCH] fix: Fixed an issue with calculating the endingAddress of a
 coil-response.

---
 .../plc4x/java/modbus/base/optimizer/ModbusOptimizer.java       | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plc4j/drivers/modbus/src/main/java/org/apache/plc4x/java/modbus/base/optimizer/ModbusOptimizer.java b/plc4j/drivers/modbus/src/main/java/org/apache/plc4x/java/modbus/base/optimizer/ModbusOptimizer.java
index f4f1ff1e382..e932756437b 100644
--- a/plc4j/drivers/modbus/src/main/java/org/apache/plc4x/java/modbus/base/optimizer/ModbusOptimizer.java
+++ b/plc4j/drivers/modbus/src/main/java/org/apache/plc4x/java/modbus/base/optimizer/ModbusOptimizer.java
@@ -348,7 +348,7 @@ protected static class Response {
         public Response(int startingAddress, byte[] responseData) {
             this.startingAddress = startingAddress;
             this.responseData = responseData;
-            this.endingAddressCoil = responseData.length * 8;
+            this.endingAddressCoil = startingAddress + responseData.length * 8;
             // In general a "Celil(responseData.length / 2)" would have been more correct,
             // but the data returned from the device should already be an even number.
             this.endingAddressRegister = startingAddress + (responseData.length / 2);