It is used for the conversion of various protocols to LoRa of RS485 communication bus, and supports the conversion of 2 general (switch/analog) inputs and 2 relay outputs or 2 analog outputs to LoRa, which can support field function block programming, realize the data and local IO port after protocol conversion, and carry out the addition and subtraction of analog and switching quantities, PID adjustment, and field logic programming of switching input/output state machines.