Add submission # 5894

#5894

Author: ArduinoBot

registry.txt

@@ -7863,3 +7863,5 @@ https://github.com/johnosbb/hx1838decoder.git|Contributed|hx1838decoder
 https://github.com/a-saab/PrayerTimes.git|Contributed|PrayerTimes
 https://github.com/RyLeeHarrison/EventEmitter.git|Contributed|EventEmitter
 https://github.com/janscience/MicroConfig.git|Contributed|MicroConfig
+https://github.com/CMB27/ModbusTCPComm.git|Contributed|ModbusTCPComm
+https://github.com/CMB27/ModbusTCPSlave.git|Contributed|ModbusTCPSlave