Add submission # 6667

#6667

Author: ArduinoBot

registry.txt

@@ -8272,3 +8272,4 @@ https://github.com/GyverLibs/GyverPing.git|Contributed|GyverPing
 https://github.com/dayatkun01/ClearDS1302.git|Contributed|ClearDS1302
 https://github.com/ennio64/CL57R-Stepper-Driver-Arduino-Library.git|Contributed|CL57RStepper
 https://github.com/senex-code/CarBase.git|Contributed|CarBase
+https://github.com/m5stack/M5Unit-Step16.git|Contributed|M5UnitStep16