Add submission # 6538

#6538

Author: ArduinoBot

registry.txt

@@ -8276,3 +8276,4 @@ https://github.com/dejwk/roo_quantity.git|Contributed|roo_quantity
 https://github.com/dejwk/roo_threads.git|Contributed|roo_threads
 https://github.com/faisalill/BMP390.git|Contributed|BMP390
 https://github.com/RacoonX65/CalibrationLib.git|Contributed|CalibrationLib
+https://github.com/phuongnamzz/HLK-LD2410S.git|Contributed|HLK-LD2410S