LCD Fix

ModulosDSP_101.ino

@@ -695,13 +695,14 @@ static void handleOtaStream() {
 //=============================================================
 void setup() {
   Wire.begin(I2C_SDA, I2C_SCL);
-  Wire.setClock(400000);
+  Wire.setClock(100000);  // PCF8574 backpacks are often 100 kHz only — use safe speed for LCD init
 
   statusLed.begin();
   statusLed.setBrightness(NEOPIXEL_BRIGHT);
   statusLed.show();
 
   s_lcdOk = (lcd.begin(20, 4) == 0);
+  Wire.setClock(400000);  // restore for DSP / EEPROM
   if (s_lcdOk) {
     lcd.display(); lcd.backlight();
     lcd.setCursor(2, 0); lcd.print("Modulos AudioDSP"); delay(1000);