From 12fb67cc63df03ddafedfd7759eaf0e51ac92abd Mon Sep 17 00:00:00 2001
From: Ing-Dom <dom@ing-dom.de>
Date: Wed, 17 Jul 2024 22:22:58 +0200
Subject: [PATCH] fix: only set pinMode of Prog button pin when pin is >= 0 and
 isr function is defined otherwise it is useless anyway and causes warnings.

---
 src/knx_facade.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/knx_facade.h b/src/knx_facade.h
index 75d8fdb..3f1c60b 100644
--- a/src/knx_facade.h
+++ b/src/knx_facade.h
@@ -286,10 +286,10 @@ template <class P, class B> class KnxFacade : private SaveRestore
             pinMode(ledPin(), OUTPUT);
 
         progLedOff();
-        pinMode(buttonPin(), INPUT_PULLUP);
-
+        
         if (_progButtonISRFuncPtr && _buttonPin >= 0)
         {
+            pinMode(buttonPin(), INPUT_PULLUP);
             // Workaround for https://github.com/arduino/ArduinoCore-samd/issues/587
             #if (ARDUINO_API_VERSION >= 10200)
                 attachInterrupt(_buttonPin, _progButtonISRFuncPtr, (PinStatus)CHANGE);