Add submission # 2506

#2506

Author: ArduinoBot

registry.txt

@@ -5697,3 +5697,4 @@ https://github.com/fredlarochelle/RunningStats.git|Contributed|RunningStats
 https://github.com/triqadafi/TQDF_WatchOS.git|Contributed|TQDF_WatchOS
 https://github.com/Justin-Pl/PCA9685_LED_DRIVER.git|Contributed|PCA9685_LED_DRIVER
 https://github.com/thingsboard/pubsubclient.git|Contributed|TBPubSubClient
+https://github.com/congtrol/remote-signal-arduino.git|Contributed|RemoteSignal