Bidirectional communication device based on dual-mode wireless to RS485 bus

The utility model discloses a bidirectional communication device based on a dual-mode wireless to RS485 bus, which belongs to the technical field of communication equipment and comprises a power supply module, an output end of the power supply module is connected with a switch, an output end of the switch is connected with a voltage reduction and stabilization module, and an output end of the voltage reduction and stabilization module is respectively connected with an RS485 module and a single chip microcomputer. The single-chip microcomputer integrates low-power-consumption Bluetooth and WI-FI, after the single-chip microcomputer is connected with the MAX13085 chip of the RS485 module, received RS485 data can be sent to a serial port tool APP of a mobile phone through the Bluetooth or the WI-FI, in a short-distance data communication scene, the Bluetooth can be selected to communicate with the RS485 module, and in a long-distance data communication scene, the RS485 module can be selected to communicate with