Add submission # 4990

#4990

Author: ArduinoBot

registry.txt

@@ -7370,3 +7370,4 @@ https://github.com/EduKits/ColourKit.git|Contributed|ColourKit
 https://github.com/microbotsio/CodeCell.git|Contributed|CodeCell
 https://github.com/DannyRavi/AD7747.git|Contributed|AD7747
 https://github.com/avandalen/avdweb_CodeDebugScope.git|Contributed|CodeDebugScope
+https://github.com/LeeLeahy2/R4A_ESP32.git|Contributed|R4A_ESP32