free GPIO17 on "ESP32-D0WDR2-V3" (WLED-MM way)

this is a new "package" with on-chip PSRAM. Only gpio16 is reserved for PSRAM on this chip.

Author: softhack007

wled00/pin_manager.cpp

@@ -144,7 +144,8 @@ String PinManagerClass::getPinSpecialText(int gpio) {  // special purpose PIN in
       //if (gpio == 15) return (F("(strapping pin - MTDO)"));
       //if (gpio > 11 && gpio < 16) return (F("(optional) JTAG debug probe"));
       #if defined(BOARD_HAS_PSRAM)
-        if (gpio == 16 || gpio == 17) return (F("(reserved) PSRAM"));
+        if (gpio == 16) return (F("(reserved) PSRAM"));
+        if ((gpio == 17) && (strncmp_P(PSTR("ESP32-D0WDR2-V3"), ESP.getChipModel(), 15) != 0) ) return (F("(reserved) PSRAM"));
       #endif
       #if defined(ARDUINO_TTGO_T7_V14_Mini32) || defined(ARDUINO_LOLIN_D32_PRO) || defined(ARDUINO_ADAFRUIT_FEATHER_ESP32_V2)
         if (gpio == 35) return (F("(reserved) _VBAT voltage monitoring"));  // WLEDMM experimental
@@ -766,7 +767,8 @@ bool PinManagerClass::isPinOk(byte gpio, bool output) const
       // for classic ESP32 (non-mini) modules, these are the SPI flash pins
       if (gpio > 5 && gpio < 12) return false;      //SPI flash pins
     }
-    //WLEDMM gpio 16/17 (PSRAM or SPI FLASH) are handled differently
+    // WLEDMM gpio 16/17 (PSRAM or SPI FLASH) are handled differently !
+    //
     // if (((strncmp_P(PSTR("ESP32-PICO"), ESP.getChipModel(), 10) == 0) ||
     //     (strncmp_P(PSTR("ESP32-U4WDH"), ESP.getChipModel(), 11) == 0))
     //    && (gpio == 16 || gpio == 17)) return false; // PICO-D4/U4WDH: gpio16+17 are in use for onboard SPI FLASH

wled00/wled.cpp

@@ -668,8 +668,15 @@ void WLED::setup()
   //pinManager.allocateMultiplePins(pins, sizeof(pins)/sizeof(managed_pin_type), PinOwner::SPI_RAM);
   #else
   // GPIO16/GPIO17 reserved for SPI RAM
-  managed_pin_type pins[] = { {16, true}, {17, true} };
-  pinManager.allocateMultiplePins(pins, sizeof(pins)/sizeof(managed_pin_type), PinOwner::SPI_RAM);
+  if (strncmp_P(PSTR("ESP32-D0WDR2-V3"), ESP.getChipModel(), 15) == 0) {
+    // ESP32-D0WDR2-V3 keeps gpio17 available
+    managed_pin_type pins[] = { {16, true} };
+    pinManager.allocateMultiplePins(pins, sizeof(pins)/sizeof(managed_pin_type), PinOwner::SPI_RAM);
+  } else {
+    managed_pin_type pins[] = { {16, true}, {17, true} };
+    pinManager.allocateMultiplePins(pins, sizeof(pins)/sizeof(managed_pin_type), PinOwner::SPI_RAM);
+  }
+
   #endif
   #if defined(BOARD_HAS_PSRAM) && (defined(WLED_USE_PSRAM) || defined(WLED_USE_PSRAM_JSON))       // WLEDMM
   if (psramFound()) {

wled00/xml.cpp

@@ -232,8 +232,12 @@ void appendGPIOinfo() {
   //Note: Using pin 3 (RX) disables Adalight / Serial JSON
 
   #if defined(ARDUINO_ARCH_ESP32) && defined(BOARD_HAS_PSRAM)
-    #if !defined(CONFIG_IDF_TARGET_ESP32S2) && !defined(CONFIG_IDF_TARGET_ESP32S3) && !defined(CONFIG_IDF_TARGET_ESP32C3)
-    if (psramFound()) oappend(SET_F(",16,17")); // GPIO16 & GPIO17 reserved for SPI RAM on ESP32 (not on S2, S3 or C3)
+    #if defined(CONFIG_IDF_TARGET_ESP32) // classic esp32
+    if (strncmp_P(PSTR("ESP32-D0WDR2-V3"), ESP.getChipModel(), 15) == 0) {
+      if (psramFound()) oappend(SET_F(",16")); // GPIO16 reserved for SPI RAM on ESP32-D0WDR2-V3
+    } else {
+      if (psramFound()) oappend(SET_F(",16,17")); // GPIO16 & GPIO17 reserved for SPI RAM on ESP32 (not on S2, S3 or C3)
+    }
     #elif defined(CONFIG_IDF_TARGET_ESP32S3)
     if (psramFound()) oappend(SET_F(",33,34,35,36,37")); // in use for "octal" PSRAM or "octal" FLASH -seems that octal PSRAM is very common on S3.
     #endif