Add submission # 6802

#6802

Author: ArduinoBot

registry.txt

@@ -8298,3 +8298,4 @@ https://github.com/gavinlyonsrepo/ILI9341_LTSM.git|Contributed|ILI9341_LTSM
 https://github.com/CuiYao631/HomeSpan-zh.git|Contributed|HomeSpan-zh
 https://github.com/milad-nikpendar/initBuzzer.git|Contributed|initBuzzer
 https://github.com/milad-nikpendar/initGT911.git|Contributed|initGT911
+https://github.com/gvp-257/SendOnlySerial.git|Contributed|SendOnlySerial