From 63e7c6954ec51b77ce39f18be8062608c11192a9 Mon Sep 17 00:00:00 2001
From: bmalinowsky <bmalinowsky@github.com>
Date: Thu, 25 Apr 2024 20:51:36 +0200
Subject: [PATCH] Set/get EMI type is only mandatory if > 1 EMI types are
 supported

---
 src/io/calimero/link/KNXNetworkMonitorUsb.java | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/io/calimero/link/KNXNetworkMonitorUsb.java b/src/io/calimero/link/KNXNetworkMonitorUsb.java
index 018ab436..6f55074f 100644
--- a/src/io/calimero/link/KNXNetworkMonitorUsb.java
+++ b/src/io/calimero/link/KNXNetworkMonitorUsb.java
@@ -177,8 +177,13 @@ private boolean trySetActiveEmi(final UsbConnection.EmiType active)
 		throws KNXPortClosedException, KNXTimeoutException, InterruptedException
 	{
 		if (emiTypes.contains(active)) {
-			conn.setActiveEmiType(active);
-			activeEmi = conn.activeEmiType();
+			// set & get/response of EMI type is only mandatory if > 1 EMI types are supported
+			if (emiTypes.size() > 1) {
+				conn.setActiveEmiType(active);
+				activeEmi = conn.activeEmiType();
+			}
+			else
+				activeEmi = active;
 			return activeEmi == active;
 		}
 		return false;