Improved attempts, still need encyption

src/BluettiBLE.cpp

@@ -204,17 +204,17 @@ void BluettiBLE::onScanResult(BLEAdvertisedDevice advertisedDevice) {
     bool hasBluettiService = advertisedDevice.haveServiceUUID() &&
                              advertisedDevice.isAdvertisingService(BLUETTI_SERVICE_UUID);
 
+    std::string nm = advertisedDevice.getName();   // hold a copy (c_str() of a
+                                                   // temporary would dangle)
     if (debugEnabled) {
-        const char* nm = advertisedDevice.getName().c_str();
         Serial.printf("[BluettiBLE]   seen: name='%s' rssi=%d bluetti=%s%s\n",
-                      (nm && nm[0]) ? nm : "(no name)",
+                      nm.empty() ? "(no name)" : nm.c_str(),
                       advertisedDevice.getRSSI(),
                       hasBluettiService ? "yes" : "no",
-                      (strcmp(nm, want) == 0) ? "  <-- MATCHES" : "");
+                      (nm == want) ? "  <-- MATCHES" : "");
     }
 
-    if (hasBluettiService &&
-        strcmp(advertisedDevice.getName().c_str(), want) == 0) {
+    if (hasBluettiService && nm == want) {
         if (foundDevice) delete foundDevice;
         foundDevice = new BLEAdvertisedDevice(advertisedDevice);
         devices[activeIndex].device.rssi = advertisedDevice.getRSSI();