Add dump memory (#336)

lib/BleFingerprint/GUI.cpp

@@ -149,7 +149,7 @@ void GUI::begin()
         sprite.createSprite(M5.Lcd.width(), M5.Lcd.height());
         sprite.setSwapBytes(true);
 #elif defined M5ATOM
-        M5.begin(false, false, true);
+        M5.begin(false, false, false);
         M5.dis.drawpix(0, CRGB(64, 0, 0));
 #endif
         init = true;

src/main.cpp

@@ -311,6 +311,10 @@ void onMqttMessage(char *topic, char *payload, AsyncMqttClientMessageProperties
     {
         ESP.restart();
     }
+    else if (command == "dump_memory")
+    {
+        heap_caps_dump_all();
+    }
 
     fingerprints.setParams(refRssi, forgetMs, skipDistance, skipMs, maxDistance, include, exclude, query);
 }