diff --git a/ESP8266/ESP8266.ino b/ESP8266/ESP8266.ino
index 8c1c497..1cda0c8 100644
--- a/ESP8266/ESP8266.ino
+++ b/ESP8266/ESP8266.ino
@@ -7,7 +7,7 @@
 // ================================================================
 //  OTA CONFIG
 // ================================================================
-#define FW_VERSION   9
+#define FW_VERSION   10
 #define GITEA_HOST   "https://git.nacho.myds.me"
 #define GITEA_OWNER  "Natxo"
 #define GITEA_REPO   "Arduino-Car"
@@ -57,47 +57,53 @@ static void checkOTA() {
     return;   // sin WiFi, arranque normal
   }
 
-  BearSSL::WiFiClientSecure client;
-  client.setInsecure();   // cert Let's Encrypt/autofirmado — OK para LAN privada
-  HTTPClient http;
-
   String base  = String(GITEA_HOST) + "/" + GITEA_OWNER + "/" + GITEA_REPO
                + "/raw/branch/" + GITEA_BRANCH + "/firmware/esp8266/";
   String token = "?token=" + String(GITEA_TOKEN);
 
-  http.begin(client, base + "version.txt" + token);
-  http.setTimeout(10000);
-  int code = http.GET();
-  String body;
-  if (code == HTTP_CODE_OK) body = http.getString();
-  http.end();
-
-  if (code == HTTP_CODE_OK) {
-    body.trim();
-    int remoteVer = body.toInt();
-    if (remoteVer > FW_VERSION) {
-      // 4 pitidos = ESP8266 actualizando
-      pinMode(buzzerPin, OUTPUT);
-      for (int i = 0; i < 4; i++) {
-        digitalWrite(buzzerPin, HIGH);
-        delay(150);
-        digitalWrite(buzzerPin, LOW);
-        delay(150);
-      }
-      delay(300);
-
-      // Fuerza pines de motor a LOW antes del flash para minimizar glitch de GPIO
-      analogWrite(ENA, 0); analogWrite(ENB, 0);
-      digitalWrite(IN1, LOW); digitalWrite(IN2, LOW);
-      digitalWrite(IN3, LOW); digitalWrite(IN4, LOW);
-
-      BearSSL::WiFiClientSecure updateClient;
-      updateClient.setInsecure();
-      ESPhttpUpdate.setFollowRedirects(HTTPC_STRICT_FOLLOW_REDIRECTS);
-      ESPhttpUpdate.rebootOnUpdate(true);
-      ESPhttpUpdate.update(updateClient, base + "firmware.bin" + token);
-      // Si llega aquí, el update falló — continúa arranque normal
+  // ── Bloque de scope: libera el cliente BearSSL antes de la descarga ──
+  // BearSSL ocupa ~20KB de heap. Si los dos clientes coexisten el heap
+  // se agota y ESPhttpUpdate falla silenciosamente.
+  int remoteVer = 0;
+  {
+    BearSSL::WiFiClientSecure client;
+    client.setInsecure();
+    client.setBufferSizes(512, 512);   // buffers mínimos — suficiente para la respuesta
+    HTTPClient http;
+    http.begin(client, base + "version.txt" + token);
+    http.setTimeout(10000);
+    int code = http.GET();
+    if (code == HTTP_CODE_OK) {
+      String body = http.getString();
+      body.trim();
+      remoteVer = body.toInt();
     }
+    http.end();
+  }  // ← client y http se destruyen aquí, ~20KB liberados
+
+  if (remoteVer > FW_VERSION) {
+    // 4 pitidos = ESP8266 actualizando
+    pinMode(buzzerPin, OUTPUT);
+    for (int i = 0; i < 4; i++) {
+      digitalWrite(buzzerPin, HIGH);
+      delay(150);
+      digitalWrite(buzzerPin, LOW);
+      delay(150);
+    }
+    delay(300);
+
+    // Fuerza pines de motor a LOW antes del flash para minimizar glitch de GPIO
+    analogWrite(ENA, 0); analogWrite(ENB, 0);
+    digitalWrite(IN1, LOW); digitalWrite(IN2, LOW);
+    digitalWrite(IN3, LOW); digitalWrite(IN4, LOW);
+
+    BearSSL::WiFiClientSecure updateClient;
+    updateClient.setInsecure();
+    updateClient.setBufferSizes(512, 512);   // reduce heap BearSSL durante descarga
+    ESPhttpUpdate.setFollowRedirects(HTTPC_STRICT_FOLLOW_REDIRECTS);
+    ESPhttpUpdate.rebootOnUpdate(true);
+    ESPhttpUpdate.update(updateClient, base + "firmware.bin" + token);
+    // Si llega aquí, el update falló — continúa arranque normal
   }
 
   WiFi.disconnect();
@@ -127,6 +133,11 @@ void waitForReady() {
           delay(50);
           while (Serial.available()) Serial.read();  // flush post-handshake
           espReady = true;
+          // 2 pitidos: conexión entre placas establecida
+          for (int i = 0; i < 2; i++) {
+            digitalWrite(buzzerPin, HIGH); delay(100);
+            digitalWrite(buzzerPin, LOW);  delay(100);
+          }
           return;
         }
         buf = "";
diff --git a/Esp32Cam/Esp32Cam.ino b/Esp32Cam/Esp32Cam.ino
index 6b63424..7f1760b 100644
--- a/Esp32Cam/Esp32Cam.ino
+++ b/Esp32Cam/Esp32Cam.ino
@@ -10,7 +10,7 @@
 // ================================================================
 //  OTA CONFIG
 // ================================================================
-#define FW_VERSION   9
+#define FW_VERSION   10
 #define GITEA_HOST   "https://git.nacho.myds.me"
 #define GITEA_OWNER  "Natxo"
 #define GITEA_REPO   "Arduino-Car"
diff --git a/firmware/esp32cam/firmware.bin b/firmware/esp32cam/firmware.bin
index 878e88c..77e9e99 100644
Binary files a/firmware/esp32cam/firmware.bin and b/firmware/esp32cam/firmware.bin differ
diff --git a/firmware/esp32cam/version.txt b/firmware/esp32cam/version.txt
index f11c82a..9a03714 100644
--- a/firmware/esp32cam/version.txt
+++ b/firmware/esp32cam/version.txt
@@ -1 +1 @@
-9
\ No newline at end of file
+10
\ No newline at end of file
diff --git a/firmware/esp8266/firmware.bin b/firmware/esp8266/firmware.bin
index 9757547..8c0b436 100644
Binary files a/firmware/esp8266/firmware.bin and b/firmware/esp8266/firmware.bin differ
diff --git a/firmware/esp8266/version.txt b/firmware/esp8266/version.txt
index f11c82a..9a03714 100644
--- a/firmware/esp8266/version.txt
+++ b/firmware/esp8266/version.txt
@@ -1 +1 @@
-9
\ No newline at end of file
+10
\ No newline at end of file