From 07d74ee692206930c39d87e9f679236dd18ba730 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bla=C5=BE=20Kristan?= <blaz@kristan-sp.si>
Date: Wed, 7 Jul 2021 10:18:00 +0200
Subject: [PATCH] Default button pin allocation on 1st boot.

---
 wled00/cfg.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/wled00/cfg.cpp b/wled00/cfg.cpp
index 36f7169c..4d6c2329 100644
--- a/wled00/cfg.cpp
+++ b/wled00/cfg.cpp
@@ -169,14 +169,17 @@ bool deserializeConfig(JsonObject doc, bool fromFS) {
     }
   } else {
     // new install/missing configuration (button 0 has defaults)
-    if (fromFS)
-      for (uint8_t s=1; s<WLED_MAX_BUTTONS; s++) {
+    if (fromFS) {
+      uint8_t s=0;
+      if (pinManager.allocatePin(btnPin[0])) s++; // do not clear button 0 if pin successfully allocated
+      for (; s<WLED_MAX_BUTTONS; s++) {
         btnPin[s]           = -1;
         buttonType[s]       = BTN_TYPE_NONE;
         macroButton[s]      = 0;
         macroLongPress[s]   = 0;
         macroDoublePress[s] = 0;
       }
+    }
   }
   CJSON(touchThreshold,btn_obj[F("tt")]);
   CJSON(buttonPublishMqtt,btn_obj["mqtt"]);