Add submission # 4214

#4214

Author: ArduinoBot

registry.txt

@@ -6874,3 +6874,4 @@ https://github.com/Howard-Z/UCLA-SMV-CAN.git|Contributed|SMV_CAN_Bus
 https://github.com/bonezegei/Bonezegei_Printf.git|Contributed|Bonezegei_Printf
 https://github.com/Erqos/EQSP32.git|Contributed|EQSP32
 https://github.com/I-AM-ENGINEER/MT6701-arduino.git|Contributed|MT6701-arduino
+https://github.com/yuuu/M5StampC3LED.git|Contributed|M5StampC3LED