Allow disable internal pull-up resistors.

Fixes #2896 and #2899

wled00/cfg.cpp

@@ -192,6 +192,9 @@ bool deserializeConfig(JsonObject doc, bool fromFS) {
 
   // read multiple button configuration
   JsonObject btn_obj = hw["btn"];
+  int pull = -1; // trick for inverted setting
+  CJSON(pull, btn_obj[F("pull")]);
+  if (pull>=0) disablePullUp = pull;
   JsonArray hw_btn_ins = btn_obj[F("ins")];
   if (!hw_btn_ins.isNull()) {
     uint8_t s = 0;
@@ -200,11 +203,15 @@ bool deserializeConfig(JsonObject doc, bool fromFS) {
       int8_t pin = btn["pin"][0] | -1;
       if (pin > -1 && pinManager.allocatePin(pin, false, PinOwner::Button)) {
         btnPin[s] = pin;
-        #ifdef ESP32
-        pinMode(btnPin[s], buttonType[s]==BTN_TYPE_PUSH_ACT_HIGH ? INPUT_PULLDOWN : INPUT_PULLUP);
-        #else
-        pinMode(btnPin[s], INPUT_PULLUP);
-        #endif
+        if (disablePullUp) {
+          pinMode(btnPin[s], INPUT);
+        } else {
+          #ifdef ESP32
+          pinMode(btnPin[s], buttonType[s]==BTN_TYPE_PUSH_ACT_HIGH ? INPUT_PULLDOWN : INPUT_PULLUP);
+          #else
+          pinMode(btnPin[s], INPUT_PULLUP);
+          #endif
+        }
       } else {
         btnPin[s] = -1;
       }
@@ -735,6 +742,7 @@ void serializeConfig() {
   // button(s)
   JsonObject hw_btn = hw.createNestedObject("btn");
   hw_btn["max"] = WLED_MAX_BUTTONS; // just information about max number of buttons (not actually used)
+  hw_btn[F("pull")] = !disablePullUp;
   JsonArray hw_btn_ins = hw_btn.createNestedArray("ins");
 
   // configuration for all buttons

wled00/data/settings_leds.htm

@@ -617,6 +617,7 @@ Length: <input type="number" name="XC${i}" id="xc${i}" class="l" min="1" max="65
     </div>
     <hr class="sml">
     <div id="btns"></div>
+    Disable internal pull-up/down: <input type="checkbox" name="IP"><br>
     Touch threshold: <input type="number" class="s" min="0" max="100" name="TT" required><br>
     IR GPIO: <input type="number" min="-1" max="48" name="IR" onchange="UI()" class="xs"><select name="IT" onchange="UI()">
     <option value=0>Remote disabled</option>

wled00/set.cpp

@@ -161,6 +161,7 @@ void handleSettingsSet(AsyncWebServerRequest *request, byte subPage)
     }
     rlyMde = (bool)request->hasArg(F("RM"));
 
+    disablePullUp = (bool)request->hasArg(F("IP"));
     for (uint8_t i=0; i<WLED_MAX_BUTTONS; i++) {
       char bt[4] = "BT"; bt[2] = (i<10?48:55)+i; bt[3] = 0; // button pin (use A,B,C,... if WLED_MAX_BUTTONS>10)
       char be[4] = "BE"; be[2] = (i<10?48:55)+i; be[3] = 0; // button type (use A,B,C,... if WLED_MAX_BUTTONS>10)
@@ -168,11 +169,15 @@ void handleSettingsSet(AsyncWebServerRequest *request, byte subPage)
       if (pinManager.allocatePin(hw_btn_pin,false,PinOwner::Button)) {
         btnPin[i] = hw_btn_pin;
         buttonType[i] = request->arg(be).toInt();
-        #ifdef ESP32
-        pinMode(btnPin[i], buttonType[i]==BTN_TYPE_PUSH_ACT_HIGH ? INPUT_PULLDOWN : INPUT_PULLUP);
-        #else
-        pinMode(btnPin[i], INPUT_PULLUP);
-        #endif
+        if (disablePullUp) {
+          pinMode(btnPin[i], INPUT);
+        } else {
+          #ifdef ESP32
+          pinMode(btnPin[i], buttonType[i]==BTN_TYPE_PUSH_ACT_HIGH ? INPUT_PULLDOWN : INPUT_PULLUP);
+          #else
+          pinMode(btnPin[i], INPUT_PULLUP);
+          #endif
+        }
       } else {
         btnPin[i] = -1;
         buttonType[i] = BTN_TYPE_NONE;

wled00/wled.h

@@ -8,7 +8,7 @@
  */
 
 // version code in format yymmddb (b = daily build)
-#define VERSION 2211260
+#define VERSION 2211261
 
 //uncomment this if you have a "my_config.h" file you'd like to use
 //#define WLED_USE_MY_CONFIG
@@ -516,6 +516,7 @@ WLED_GLOBAL bool buttonPressedBefore[WLED_MAX_BUTTONS]        _INIT({false});
 WLED_GLOBAL bool buttonLongPressed[WLED_MAX_BUTTONS]          _INIT({false});
 WLED_GLOBAL unsigned long buttonPressedTime[WLED_MAX_BUTTONS] _INIT({0});
 WLED_GLOBAL unsigned long buttonWaitTime[WLED_MAX_BUTTONS]    _INIT({0});
+WLED_GLOBAL bool disablePullUp                                _INIT(false);
 WLED_GLOBAL byte touchThreshold                               _INIT(TOUCH_THRESHOLD);
 
 // notifications

wled00/xml.cpp

@@ -458,6 +458,7 @@ void getSettingsJS(byte subPage, char* dest)
       oappend(itoa(buttonType[i],nS,10));
       oappend(SET_F(");"));
     }
+    sappend('c',SET_F("IP"),disablePullUp);
     sappend('v',SET_F("TT"),touchThreshold);
     sappend('v',SET_F("IR"),irPin);
     sappend('v',SET_F("IT"),irEnabled);