Replace UrlEncode library with local implementation.

include/UrlEncode.h

@@ -0,0 +1,34 @@
+//+--------------------------------------------------------------------------
+//
+// File:        UrlEncode.h
+//
+// NightDriverStrip - (c) 2026 Plummer's Software LLC.  All Rights Reserved.
+//
+// This file is part of the NightDriver software project.
+//
+//    NightDriver is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU General Public License as published by
+//    the Free Software Foundation, either version 3 of the License, or
+//    (at your option) any later version.
+//
+//    NightDriver is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//    GNU General Public License for more details.
+//
+//    You should have received a copy of the GNU General Public License
+//    along with Nightdriver.  It is normally found in copying.txt
+//    If not, see <https://www.gnu.org/licenses/>.
+//
+// Description:
+//
+//   Helper to URL-encode strings for API calls.
+//   Implemenation provides RFC 1738 style percent-encoding.
+//
+//---------------------------------------------------------------------------
+
+#pragma once
+
+#include <Arduino.h>
+
+String urlEncode(const String& str);

include/effects/matrix/PatternStocks.h

@@ -39,7 +39,6 @@
 #include <gfxfont.h>                // Adafruit GFX font structs
 #include <string.h>
 #include <HTTPClient.h>
-#include <UrlEncode.h>
 #include <ledstripeffect.h>
 #include <ArduinoJson.h>
 #include "systemcontainer.h"

include/effects/matrix/PatternSubscribers.h

@@ -33,7 +33,6 @@
 #ifndef PatternSub_H
 #define PatternSub_H
 
-#include <UrlEncode.h>
 #include "systemcontainer.h"
 
 extern const GFXfont Apple5x7 PROGMEM;

include/effects/matrix/PatternWeather.h

@@ -604,4 +604,4 @@ class PatternWeather : public EffectWithId<PatternWeather>
     }
 };
 
-#endif
+#endif

platformio.ini

@@ -58,7 +58,6 @@ lib_deps        = crankyoldgit/IRremoteESP8266  @ ^2.8.6
                   esp32async/ESPAsyncWebServer  @ ^3.7.10
                   bblanchon/ArduinoJson         @ ^7.4.2
                   https://github.com/PlummersSoftwareLLC/RemoteDebug
-                  plageoj/UrlEncode    @ ^1.0.1
 
 ; This partition table is the default and fits everything in 4M of flash without OTA.
 board_build.partitions = config/partitions_custom_noota.csv

src/deviceconfig.cpp

@@ -107,6 +107,7 @@ bool DeviceConfig::SetTimeZone(const String& newTimeZone, bool skipWrite)
 
 DeviceConfig::ValidateResponse DeviceConfig::ValidateOpenWeatherAPIKey(const String &newOpenWeatherAPIKey)
 {
+#if ENABLE_WIFI
     HTTPClient http;
 
     String url = "http://api.openweathermap.org/data/2.5/weather?lat=0&lon=0&appid=" + urlEncode(newOpenWeatherAPIKey);
@@ -141,6 +142,9 @@ DeviceConfig::ValidateResponse DeviceConfig::ValidateOpenWeatherAPIKey(const Str
             return { false, "Unable to validate" };
         }
     }
+#else
+    return { true, "" };
+#endif
 }
 
 void DeviceConfig::SetColorSettings(const CRGB& newGlobalColor, const CRGB& newSecondColor)

src/network.cpp

@@ -51,8 +51,36 @@ DRAM_ATTR bool NTPTimeClient::_bClockSet = false;
 DRAM_ATTR std::mutex NTPTimeClient::_clockMutex;                                    // Clock guard mutex for SNTP client
 
 
-
 #if ENABLE_WIFI
+
+String urlEncode(const String& str)
+{
+    String encodedString = "";
+    char c;
+    char code0;
+    char code1;
+    for (int i = 0; i < str.length(); i++) {
+        c = str.charAt(i);
+        if (isalnum(c)) {
+            encodedString += c;
+        } else {
+            code1 = (c & 0xf) + '0';
+            if ((c & 0xf) > 9) {
+                code1 = (c & 0xf) - 10 + 'A';
+            }
+            c = (c >> 4) & 0xf;
+            code0 = c + '0';
+            if (c > 9) {
+                code0 = c - 10 + 'A';
+            }
+            encodedString += '%';
+            encodedString += code0;
+            encodedString += code1;
+        }
+    }
+    return encodedString;
+}
+
 void DoStatsCommand()
 {
     auto& bufferManager = g_ptrSystem->BufferManagers()[0];