From f10f3d530595a99286ebcb088559507c58e28f56 Mon Sep 17 00:00:00 2001
From: MichaelDvP <github@mdvp.de>
Date: Mon, 4 Aug 2025 10:15:59 +0200
Subject: [PATCH] esp32: some pins have no internal pullup

---
 lib/PButton/PButon.cpp | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/lib/PButton/PButon.cpp b/lib/PButton/PButon.cpp
index 00c9c7058..8324b7728 100644
--- a/lib/PButton/PButon.cpp
+++ b/lib/PButton/PButon.cpp
@@ -54,7 +54,15 @@ bool PButton::init(uint8_t pin, bool pullMode) {
     pullMode_ = pullMode; // 1=HIGH (pullup) 0=LOW (pulldown)
 
 #if defined(ESP32)
+#if CONFIG_IDF_TARGET_ESP32
+    if (pin_ == 34 || pin_ == 35 || pin_ == 36 || pin_ == 39) {
+        pinMode(pin_, INPUT);
+    } else {
+        pinMode(pin_, pullMode ? INPUT_PULLUP : INPUT_PULLDOWN);
+    }
+#else
     pinMode(pin_, pullMode ? INPUT_PULLUP : INPUT_PULLDOWN);
+#endif
 #else // esp8266 and standalone
     pinMode(pin_, pullMode ? INPUT_PULLUP : INPUT);
 #endif
@@ -93,7 +101,15 @@ bool PButton::check(void) {
 
     // make sure the pin is still input
 #if defined(ESP32)
+#if CONFIG_IDF_TARGET_ESP32
+    if (pin_ == 34 || pin_ == 35 || pin_ == 36 || pin_ == 39) {
+        pinMode(pin_, INPUT);
+    } else {
+        pinMode(pin_, pullMode_ ? INPUT_PULLUP : INPUT_PULLDOWN);
+    }
+#else
     pinMode(pin_, pullMode_ ? INPUT_PULLUP : INPUT_PULLDOWN);
+#endif
 #else // esp8266 and standalone
     pinMode(pin_, pullMode_ ? INPUT_PULLUP : INPUT);
 #endif