Work more on Bluetti

examples/AdvMonitor/src/main.cpp

@@ -80,9 +80,11 @@ void setup() {
     bluetti.setDebug(true);   // prints discovered devices + decrypted payloads
     bluetti.setCallback(onBluettiAdv);
 
-    // CHANGE THESE: your device's BLE MAC and the 16-byte AES key (32 hex chars).
-    bluetti.addDevice("My Elite", "AA:BB:CC:DD:EE:FF",
-                      "112233445566778899aabbccddeeff00");
+    // AES key = line 3 of the BLUETTI key-export CSV (32 hex chars / 16 bytes).
+    // MAC left empty ("") so it matches the first Bluetti broadcaster it sees —
+    // set a real MAC here if more than one Bluetti is in range.
+    bluetti.addDevice("My Elite", "",
+                      "53afcd9aef4ff020f472686c00283ce5");
 
     Serial.printf("Configured %d device(s). Scanning advertisements...\n",
                   (int)bluetti.getDeviceCount());