The invention relates to the technical field of
Internet of Things sensing equipment communication, in particular to a method for transmitting a
Modbus RTU protocol in a
wide area network, which is applied to a network in which a slave
station is connected with a
master station through a communication module, and comprises the steps that the communication module generates a self-defined registration message and sends the registration message to the
master station, and the registration message comprises setting information of the communication module; the communication module is connected with a managed slave
station address; after receiving the registration message, the
master station records the setting information of the communication module and the address of the slave
station connected and managed by the communication module, and establishes a link; and the master station and the slave station carry out transmission and interaction of the
Modbus RTU protocol through the established link. According to the method, the
Modbus RTU protocol is transmitted in the
wide area network, the whole process is not limited by the fact that the slave station must have a fixed
IP address, the protocol conversion process and a conversion module are omitted, the monitoring function cost of
the Internet of Things sensing equipment is reduced, and the monitoring efficiency is improved.