Add submission # 2469

#2469

Author: ArduinoBot

registry.txt

@@ -5668,3 +5668,4 @@ https://github.com/Beirdo/Arduino-MultiWire.git|Contributed|MultiWire
 https://github.com/DinuraPasan/DOC_CAT.git|Contributed|DOC_CAT
 https://github.com/jcubuntu/us82.git|Contributed|uS82
 https://github.com/fatkhrus/TeslaCloud.git|Contributed|TeslaCloud
+https://github.com/kj7rrv/Telegraph.git|Contributed|Telegraph