firmware: v17 — waitForReady restaurado, sin watchdog

ESP8266/ESP8266.ino

@@ -7,7 +7,7 @@
 // ================================================================
 //  OTA CONFIG
 // ================================================================
-#define FW_VERSION   16
+#define FW_VERSION   17
 #define GITEA_HOST   "https://git.nacho.myds.me"
 #define GITEA_OWNER  "Natxo"
 #define GITEA_REPO   "Arduino-Car"
@@ -110,6 +110,35 @@ static void checkOTA() {
   WiFi.mode(WIFI_OFF);   // apaga radio para ahorrar energía
 }
 
+void waitForReady() {
+  delay(300);
+  while (Serial.available()) Serial.read();
+  unsigned long timeout = millis() + 90000UL;
+  String buf = "";
+  while (millis() < timeout) {
+    while (Serial.available()) {
+      char c = Serial.read();
+      if (c == '\n') {
+        buf.trim();
+        if (buf == "GO") {
+          Serial.print("OK\n");
+          delay(50);
+          while (Serial.available()) Serial.read();
+          // 2 pitidos: conexión entre placas lista
+          for (int i = 0; i < 2; i++) {
+            digitalWrite(buzzerPin, HIGH); delay(180);
+            digitalWrite(buzzerPin, LOW);  delay(180);
+          }
+          return;
+        }
+        buf = "";
+      } else if (c != '\r' && buf.length() < 8) {
+        buf += c;
+      }
+    }
+    delay(10);
+  }
+}
 
 void setup() {
   // 1. Pines y parada inmediata
@@ -133,9 +162,8 @@ void setup() {
   servoX.write(posX);
   servoY.write(posY);
 
-  // 5. Esperar a que el ESP32-CAM termine de arrancar
-  unsigned long elapsed = millis();
-  if (elapsed < 15000) delay(15000 - elapsed);
+  // 5. Esperar "GO\n" del ESP32-CAM antes de procesar comandos
+  waitForReady();
 }
 
 void loop() {