Add submission # 6340

#6340

Author: ArduinoBot

registry.txt

@@ -8155,3 +8155,4 @@ https://github.com/adafruit/Adafruit_STSPIN.git|Recommended|Adafruit STSPIN
 https://github.com/ruiseixasm/JsonTalkie.git|Contributed|JsonTalkie
 https://github.com/sciosense/ens190-arduino.git|Contributed|ScioSense_ENS190
 https://github.com/depben/PT7C4339-RTC.git|Contributed|PT7C4339-RTC
+https://github.com/RCduino/RCduino.git|Contributed|RCduino