Add submission # 6864

#6864

Author: ArduinoBot

registry.txt

@@ -8331,3 +8331,4 @@ https://github.com/littlemanbuilds/ESP32_MCPWM.git|Contributed|ESP32_MCPWM
 https://github.com/7semi-solutions/7Semi-INA260-Current-Power-Voltage-Monitor-Arduino-Library.git|Contributed|7Semi INA260
 https://github.com/Mataas08/ToFFilter.git|Contributed|ToFFilter
 https://github.com/deepanshu-deshwal/SL001_Deepanshu.git|Contributed|SL001_Deepanshu
+https://github.com/milescb/PlantMonitor.git|Contributed|PlantMonitor