Fix LCD init not checked

ModulosDSP_101.ino

@@ -77,6 +77,7 @@ WebServer  httpServer(80);
 #include "index_html.h"
 
 hd44780_I2Cexp lcd;
+static bool s_lcdOk = false;
 
 //=============================================================
 // NeoPixel status LED (Waveshare ESP32-S3 Zero, GPIO 21)
@@ -320,8 +321,10 @@ static void printWifiInfo()
   Serial.print("MAC: ");     Serial.println(WiFi.macAddress());
   Serial.println("Modulos AudioDSP");
   Serial.println(version);
-  lcd.setCursor(4, 3);
-  lcd.print(WiFi.localIP());
+  if (s_lcdOk) {
+    lcd.setCursor(4, 3);
+    lcd.print(WiFi.localIP());
+  }
 }
 
 //=============================================================
@@ -450,9 +453,14 @@ void setup() {
   statusLed.setBrightness(NEOPIXEL_BRIGHT);
   statusLed.show();
 
-  lcd.begin(20, 4); lcd.display(); lcd.backlight();
-  lcd.setCursor(2, 0); lcd.print("Modulos AudioDSP"); delay(1000);
-  lcd.setCursor(5, 1); lcd.print("Booting..."); delay(1000);
+  s_lcdOk = (lcd.begin(20, 4) == 0);
+  if (s_lcdOk) {
+    lcd.display(); lcd.backlight();
+    lcd.setCursor(2, 0); lcd.print("Modulos AudioDSP"); delay(1000);
+    lcd.setCursor(5, 1); lcd.print("Booting..."); delay(1000);
+  } else {
+    Serial.println("LCD not found - continuing without display");
+  }
 
   Serial.begin(115200); delay(1500);
   Serial.println(); Serial.println("Booting...");
@@ -474,7 +482,7 @@ void setup() {
   File root = LittleFS.open("/"); File f = root.openNextFile();
   while (f) { Serial.print("LittleFS: "); Serial.println(f.name()); f = root.openNextFile(); }
 
-  lcd.setCursor(3, 2); lcd.print("File System OK"); delay(1000);
+  if (s_lcdOk) { lcd.setCursor(3, 2); lcd.print("File System OK"); delay(1000); }
 
   tcpServer.begin();
   httpServer.on("/", HTTP_GET, handleRoot);
@@ -488,10 +496,12 @@ void setup() {
   });
   httpServer.begin();
 
-  lcd.setCursor(4, 3); lcd.print("System Ready"); delay(1000);
-  lcd.clear();
-  lcd.setCursor(2, 0); lcd.print("Modulos AudioDSP");
-  lcd.setCursor(3, 1); lcd.print(version); delay(500);
+  if (s_lcdOk) {
+    lcd.setCursor(4, 3); lcd.print("System Ready"); delay(1000);
+    lcd.clear();
+    lcd.setCursor(2, 0); lcd.print("Modulos AudioDSP");
+    lcd.setCursor(3, 1); lcd.print(version); delay(500);
+  }
 
   printWifiInfo();
   Serial.print("HTTP uploader: http://"); Serial.print(WiFi.localIP()); Serial.println("/");
@@ -713,7 +723,7 @@ static void maintainWifi()
   if (WiFi.status() != WL_CONNECTED) {
     if (!s_wifiLost) {
       Serial.println("WiFi lost");
-      lcd.setCursor(0, 3); lcd.print("WiFi lost...        ");
+      if (s_lcdOk) { lcd.setCursor(0, 3); lcd.print("WiFi lost...        "); }
       s_wifiLost = true;
     }
     WiFi.reconnect();