From 54484e1a927bac112abcc8df0ebb260fca2b5c69 Mon Sep 17 00:00:00 2001
From: nanosonde <2073569+nanosonde@users.noreply.github.com>
Date: Tue, 26 Nov 2019 15:18:54 +0100
Subject: [PATCH] save work

---
 src/knx/usb_tunnel_interface.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/knx/usb_tunnel_interface.cpp b/src/knx/usb_tunnel_interface.cpp
index 47e8b42..b3b613e 100644
--- a/src/knx/usb_tunnel_interface.cpp
+++ b/src/knx/usb_tunnel_interface.cpp
@@ -324,14 +324,15 @@ void UsbTunnelInterface::handleHidReportRxQueue()
 
 void UsbTunnelInterface::handleBusAccessServerProtocol(ServiceIdType servId, const uint8_t* requestData, uint16_t packetLength)
 {
-	uint8_t respData[3];
+	uint8_t respData[3]; // max. 3 bytes are required for a response
 
 	switch (servId)
 	{
 		case DeviceFeatureGet: // Device Feature Get
 		{
 			FeatureIdType featureId = (FeatureIdType)requestData[0];
-			respData[0] = (uint8_t) featureId;
+			respData[0] = (uint8_t) featureId; // first byte in repsonse is the featureId itself again
+
 			switch (featureId)
 			{
 				case SupportedEmiType: // Supported EMI types