Wrong choice I think. You could have learnt what you need to know about MQTT and implemented the communications in half the time it must have taken to build that flow.
Installing and using MQTT is almost trivial and will give you a robust, efficient and well tested solution.
Spend an hour reading the hivemq guide then it takes literally ten minutes to install mosquitto, place a couple of MQTT nodes on the flow and go. Rather than continuing with a two year old thread, if you have any problems then start a new thread please.
