Add submission # 7254

#7254

Author: ArduinoBot

registry.txt

@@ -8588,3 +8588,4 @@ https://github.com/MTD2A/MTD2A.git|Contributed|MTD2A
 https://github.com/asimzulfiqar/esp_cron.git|Contributed|esp_cron
 https://github.com/BojanJurca/Lightweight-Standard-Template-Library-STL-for-Arduino.git|Contributed|LightweightSTL
 https://github.com/DFRobot/DFRobot_LoRaWAN_ESP32S3.git|Contributed|DFRobot_LoRaWAN_ESP32S3
+https://github.com/marcoratto/DMFLib-Arduino.git|Contributed|DMFLib