Half-duplex RS232-RS485 automatic conversion circuit and communication equipment

The utility model provides a half-duplex RS232-RS485 automatic conversion circuit and a communication device. The circuit comprises an RS232 level conversion module, an RS485 level conversion module and a transceiving conversion level generation module, the RS232 level conversion module is in communication connection with the RS485 level conversion module; wherein the RS232 level conversion moduleis used for converting RS232 level into TTL level and transmitting the TTL level to the RS485 level conversion module, and the RS485 level conversion module is used for converting the received TTL level conversion module into RS485 differential level; the transceiving conversion level generation module is connected with the output end of the RS232 level conversion module, is used for generating atransceiving control level according to the received TTL level signal and sending the transceiving control level to the RS485 level conversion module, and is used for controlling transceiving conversion of the RS485 level con