Charging pile main controller based on Internet of Things

The invention discloses a main controller for charging a charging pile based on the Internet of Things, and the main controller comprises a central control module, a power socket, a key, a display screen, a loudspeaker, an indicating lamp, an Ethernet interface, an RS485 interface, a debugging interface, and an antenna, wherein a CAN communication module is disposed between the central control module and the RS485 interface; and the CAN communication module is used for realizing signal transmission between the central control module and the RS485 interface. In the interface protection circuit,a fourth resistor and a fifth resistor are used for absorbing a surge current, a fourth capacitor and a sixth capacitor are used for absorbing a surge current for the second time, a fifth capacitor is used for filtering interference differential-mode signals, a common-mode inductor is used for filtering common-mode signals, and a second resistor, a third resistor and a seventh capacitor form an RC filter circuit. Interfe