Ethernet double-frequency wifi and three-in-one serial port conversion function module

Abstract

The utility model discloses an Ethernet dual-frequency WIFI and three-in-one serial port function module, which comprises a serial port function module, an Ethernet module, a control module, a data compression module, a dual-frequency WIFI communication module and a local area network communication module are arranged in the serial port function module, and the Ethernet module, the dual-frequency WIFI communication module and the local area network communication module are all connected with the control module. The Ethernet module comprises a capacitor C2, a capacitor C3 and a relay J2, and the control module comprises a relay J6, a resistor R15, a gas discharge tube D11, a gas discharge tube D12, a gas discharge tube D13, a resistor R12, a resistor R13, a resistor R14, a resistor R16, a capacitor C4, an inductor L1, a capacitor C5 and a capacitor C6. The integrated circuit board is integrated on the same circuit board and can be configured on the display screen, so that the operation is more convenient and reliable, the operation threshold of technicians is reduced, and the use requirements of people are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to serial port WIFI module technical field, concretely is ethernet double -frenquency wifi and three in one conversion serial port function module. BACKGROUND

[0002] Serial port WIFI module supports multiple configuration modes, including using configuration management program based on serial port connection, using IE browser program based on network connection and the like, which enables users to select appropriate configuration mode according to actual demand, improves flexibility and convenience of use, the module supports TCP / UDP / ICMP / DHCP / DNS / HTTP and the like multiple network protocols, can satisfy data transmission demand under different scenes, enhances its versatility and applicability, serial port WIFI module supports automatic and working command mode, can automatically switch mode according to different working demand, improves intelligent level of module and user experience, module built-in WEB server, and users can configure and manage through browser, simplifies operation process, improves the convenience of maintenance, serial port WIFI module supports WEP64 / WEP128 / WPA-PSK / WPA2-PSK and the like multiple security mechanisms, ensures the security of data transmission, prevents illegal intrusion and data leakage.

[0003] However, the traditional serial port WIFI module has the following shortcomings:

[0004] At present, only wifi2.4G with wire, or wifi2.4G and 5.8G exist in the market, and the present scheme realizes three functions at the same time, which cannot meet the selection demand of customers. INVENTION CONTENT

[0005] The utility model aims at providing ethernet double -frenquency wifi and three in one conversion serial port function module to solve the problem that only wifi2.4G with wire, or wifi2.4G and 5.8G exist in the market at present, and the present scheme realizes three functions at the same time, which cannot meet the selection demand of customers.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: Ethernet double -frequency wifi and three in one conversion serial port function module, including serial port function module, it is equipped with Ethernet module, control module, data compression module, double -frequency WIFI communication module and local area network communication module in the serial port function module, Ethernet module, double -frequency WIFI communication module and local area network communication module all are connected with control module, the Ethernet module includes capacitor C2, capacitor C3 and relay J2, the control module includes gas discharge tube D11, gas discharge tube D12, gas discharge tube D13, resistance R12, resistance R13, resistance R14, resistance R16, capacitor C4, inductance L1, capacitor C5, capacitor C6, capacitor C7, capacitor C8, chip U2 and antenna ANT1, the double -frequency WIFI communication module includes chip U3, chip U4, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, resistance R17, gas discharge tube D2, gas discharge tube D3, gas discharge tube D4, gas discharge tube D5, gas discharge tube D6, gas discharge tube D7, gas discharge tube D8, gas discharge tube D9, resistance R11, resistance R10 and resistance R9.

[0007] Preferably, the 10 end foot of the relay J2, one end of the capacitor C2 and one end of the capacitor C3 are all grounded, the 14 end foot of the relay J2, the 11 end foot of the relay J2, the 15 end foot of the relay J2, the other end of the capacitor C2 and the other end of the capacitor C3 are all connected with 3.3V, the 8 end foot of the relay J2 is connected with MCU TXD, the 9 end foot of the relay J2 is connected with MCU RXD, and the 5 end foot of the relay J2 is connected with YIEN.

[0008] Preferably, the 3 end foot of the chip U2 is connected with one end of the gas discharge tube D12, the other end of the gas discharge tube D12 is connected with one end of the resistance R13, the 4 end foot of the chip U2 is connected with one end of the gas discharge tube D11, the other end of the gas discharge tube D11 is connected with one end of the resistance R12, the 31 end foot of the chip U2 is connected with one end of the resistance R16, the other end of the resistance R16 is connected with one end of the capacitor C4, the other end of the capacitor C4 is connected with one end of the inductance L1 and the 1 end foot of the antenna ANT1 respectively, the 24 end foot of the chip U2 is connected with SOP1, the 25 end foot of the chip U2 is connected with SOP2, the 34 end foot of the chip U2 is connected with SOP0, the 36 end foot of the chip U2 is connected with WIEN, the 46 end foot of the chip U2 is connected with TXD, and the 47 end foot of the chip U2 is connected with RXD.

[0009] Preferably, 37 pin of the chip U2, 40 pin of the chip U2, one end of the capacitor C5, one end of the capacitor C6, one end of the capacitor C7, one end of the capacitor C8, the other end of the resistor R12, the other end of the resistor R13 and the other end of the resistor R14 are connected with 3.3V, 1 pin of the chip U2, 2 pin of the chip U2, 16 pin of the chip U2, 26 pin of the chip U2, 27 pin of the chip U2, 28 pin of the chip U2, 29 pin of the chip U2, 30 pin of the chip U2, the other end of the inductor L1, 3 pin of the antenna ANT1, 2 pin of the antenna ANT1, 32 pin of the chip U2, 38 pin of the chip U2, 43 pin of the chip U2, 55 pin of the chip U2, 56 pin of the chip U2, 57 pin of the chip U2, 58 pin of the chip U2, 59 pin of the chip U2, 60 pin of the chip U2, 61 pin of the chip U2, 62 pin of the chip U2, 63 pin of the chip U2, the other end of the capacitor C5, the other end of the capacitor C6, the other end of the capacitor C7 and the other end of the capacitor C8 are grounded.

[0010] Preferably, the data compression module comprises the relay J6 and the resistor R15, 1 pin, 3 pin and 5 pin of the relay J6 are connected with one end of the resistor R15, the other end of the resistor R15 is connected with 3.3V, 7 pin of the relay J6 is connected with TXD, 9 pin of the relay J6 is connected with RXD, 2 pin of the relay J6 is connected with SOP0, 4 pin of the relay J6 is connected with SOP1, 6 pin of the relay J6 is connected with SOP2, 8 pin of the relay J6 is connected with MCURXD, 10 pin of the relay J6 is connected with MCUTXD.

[0011] Preferably, the 1 end pin of the chip U3 is connected with one end of the resistor R10, the 2 end pin of the chip U3 is connected with one end of the gas discharge tube D2, the other end of the gas discharge tube D2 is connected with IN10, the 3 end pin of the chip U3 is connected with one end of the resistor R11, the 4 end pin of the chip U3 is connected with one end of the gas discharge tube D4, the other end of the gas discharge tube D4 is connected with IN11, the 5 end pin of the chip U3 is connected with one end of the resistor R12, the 6 end pin of the chip U3 is connected with one end of the gas discharge tube D4, the other end of the gas discharge tube D4 is connected with IN12, the 7 end pin of the chip U3 is connected with one end of the resistor R13, the 8 end pin of the chip U3 is connected with one end of the gas discharge tube D5, the other end of the gas discharge tube D5 is connected with IN13, the 1 end pin of the chip U4 is connected with one end of the resistor R14, the 2 end pin of the chip U4 is connected with one end of the gas discharge tube D6, the other end of the gas discharge tube D6 is connected with IN14, the 3 end pin of the chip U4 is connected with one end of the resistor R15, the 4 end pin of the chip U4 is connected with one end of the gas discharge tube D7, the other end of the gas discharge tube D7 is connected with IN15, the 5 end pin of the chip U4 is connected with one end of the resistor R16, the 6 end pin of the chip U4 is connected with one end of the gas discharge tube D8, the other end of the gas discharge tube D8 is connected with IN16, the 7 end pin of the chip U4 is connected with one end of the resistor R17, the 8 end pin of the chip U4 is connected with one end of the gas discharge tube D9, the other end of the gas discharge tube D9 is connected with IN17, the 16 end pin of the chip U3 is connected with one end of the resistor R11, the 14 end pin of the chip U3 is connected with one end of the resistor R10, the 12 end pin of the chip U3 is connected with one end of the resistor R9, the other end of the resistor R11, the other end of the resistor R10 and the other end of the resistor R9 are all connected with 3.3V.

[0012] Preferably, the local network communication module comprises a relay J4, a chip U5, a local network CAN2, the 1 pin of the relay J4 is connected with the 18 pin of the chip U5, the 2 pin of the relay J4 is connected with the 17 pin of the chip U5, the 3 pin of the relay J4 is connected with the 16 pin of the chip U5, the 4 pin of the relay J4 is connected with the 15 pin of the chip U5, the 5 pin of the relay J4 is connected with the 14 pin of the chip U5, the 6 pin of the relay J4 is connected with the 13 pin of the chip U5, the 7 pin of the relay J4 is connected with the 12 pin of the chip U5, the 8 pin of the relay J4 is connected with the 11 pin of the chip U5, the 9 pin of the relay J4 is connected with the 10 pin of the chip U5, the 1 pin of the chip U5 is connected with the 4 pin of the local network CAN2, the 2 pin of the chip U5 is connected with the 8 pin of the local network CAN2, the 3 pin of the chip U5 is connected with the 12 pin of the local network CAN2, the 4 pin of the chip U5 is connected with the 20 pin of the local network CAN2, the 5 pin of the chip U5 is connected with the 22 pin of the local network CAN2, the 6 pin of the chip U5 is connected with the 24 pin of the local network CAN2, the 6 pin of the local network CAN2 is connected with WIEN, the 18 pin of the local network CAN2 is connected with YIEN, the 19 pin of the local network CAN2 is connected with OUT3, the 17 pin of the local network CAN2 is connected with OUT2, the 9 pin of the local network CAN2 is connected with OUT1, and the 9 pin of the chip U5 is grounded.

[0013] Compared with the prior art, the wireless wifi and Ethernet conversion serial port module are integrated on the same circuit board, and can be configured on the display screen, which is more convenient and reliable, reduces the operation threshold of technical personnel, and meets the use requirements of people. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the architecture schematic view of the serial port function module of the utility model;

[0015] Figure 2 It is the circuit diagram of the Ethernet module of the utility model;

[0016] Figure 3 It is the circuit diagram of the control module of the utility model;

[0017] Figure 4 It is the circuit diagram of the data compression module of the utility model;

[0018] Figure 5 It is the circuit diagram of the dual-frequency WIFI communication module of the utility model;

[0019] Figure 6The utility model discloses a circuit diagram of local area network communication module. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0021] Please refer to Figures 1-6 The utility model provides a serial port function module of three in one of ethernet double -frequency wifi, including serial port function module, be equipped with ethernet module, control module, data compression module, double -frequency WIFI communication module and local area network communication module in serial port function module, ethernet module, double -frequency WIFI communication module and local area network communication module all are connected with control module, ethernet module includes capacitor C2, capacitor C3 and relay J2, control module includes gas discharge tube D11, gas discharge tube D12, gas discharge tube D13, resistance R12, resistance R13, resistance R14, resistance R16, capacitor C4, inductance L1, capacitor C5, capacitor C6, capacitor C7, capacitor C8, chip U2 and antenna ANT1, double -frequency WIFI communication module includes chip U3, chip U4, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, resistance R17, gas discharge tube D2, gas discharge tube D3, gas discharge tube D4, gas discharge tube D5, gas discharge tube D6, gas discharge tube D7, gas discharge tube D8, gas discharge tube D9, resistance R11, resistance R10 and resistance R9.

[0022] The 10 end foot of relay J2, one end of capacitor C2 and one end of capacitor C3 all ground, the 14 end foot of relay J2, the 11 end foot of relay J2, the 15 end foot of relay J2, the other end of capacitor C2 and the other end of capacitor C3 all are connected with 3.3V, the 8 end foot of relay J2 is connected with MCU TXD, the 9 end foot of relay J2 is connected with MCU RXD, and the 5 end foot of relay J2 is connected with YIEN.

[0023] The 3 terminal pin of the chip U2 is connected with one end of the gas discharge tube D12, the other end of the gas discharge tube D12 is connected with one end of the resistor R13, the 4 terminal pin of the chip U2 is connected with one end of the gas discharge tube D11, the other end of the gas discharge tube D11 is connected with one end of the resistor R12, the 31 terminal pin of the chip U2 is connected with one end of the resistor R16, the other end of the resistor R16 is connected with one end of the capacitor C4, the other end of the capacitor C4 is connected with one end of the inductor L1 and the 1 terminal pin of the antenna ANT1 respectively, the 24 terminal pin of the chip U2 is connected with the SOP1, the 25 terminal pin of the chip U2 is connected with the SOP2, the 34 terminal pin of the chip U2 is connected with the SOP0, the 36 terminal pin of the chip U2 is connected with the WIEN, the 46 terminal pin of the chip U2 is connected with the TXD, and the 47 terminal pin of the chip U2 is connected with the RXD.

[0024] The 37 terminal pin of the chip U2, the 40 terminal pin of the chip U2, one end of the capacitor C5, one end of the capacitor C6, one end of the capacitor C7, one end of the capacitor C8, the other end of the resistor R12, the other end of the resistor R13 and the other end of the resistor R14 are all connected with 3.3V, the 1 terminal pin of the chip U2, the 2 terminal pin of the chip U2, the 16 terminal pin of the chip U2, the 26 terminal pin of the chip U2, the 27 terminal pin of the chip U2, the 28 terminal pin of the chip U2, the 29 terminal pin of the chip U2, the 30 terminal pin of the chip U2, the other end of the inductor L1, the 3 terminal pin of the antenna ANT1, the 2 terminal pin of the antenna ANT1, the 32 terminal pin of the chip U2, the 38 terminal pin of the chip U2, the 43 terminal pin of the chip U2, the 55 terminal pin of the chip U2, the 56 terminal pin of the chip U2, the 57 terminal pin of the chip U2, the 58 terminal pin of the chip U2, the 59 terminal pin of the chip U2, the 60 terminal pin of the chip U2, the 61 terminal pin of the chip U2, the 62 terminal pin of the chip U2, the 63 terminal pin of the chip U2, the other end of the capacitor C5, the other end of the capacitor C6, the other end of the capacitor C7 and the other end of the capacitor C8 are all grounded.

[0025] The data compression module comprises the relay J6 and the resistor R15, the 1 terminal pin of the relay J6, the 3 terminal pin of the relay J6 and the 5 terminal pin of the relay J6 are all connected with one end of the resistor R15, the other end of the resistor R15 is connected with 3.3V, the 7 terminal pin of the relay J6 is connected with the TXD, the 9 terminal pin of the relay J6 is connected with the RXD, the 2 terminal pin of the relay J6 is connected with the SOP0, the 4 terminal pin of the relay J6 is connected with the SOP1, the 6 terminal pin of the relay J6 is connected with the SOP2, the 8 terminal pin of the relay J6 is connected with the MCURXD, and the 10 terminal pin of the relay J6 is connected with the MCUTXD.

[0026] The 1 terminal pin of the chip U3 is connected with one end of the resistor R10, the 2 terminal pin of the chip U3 is connected with one end of the gas discharge tube D2, the other end of the gas discharge tube D2 is connected with IN10, the 3 terminal pin of the chip U3 is connected with one end of the resistor R11, the 4 terminal pin of the chip U3 is connected with one end of the gas discharge tube D4, the other end of the gas discharge tube D4 is connected with IN11, the 5 terminal pin of the chip U3 is connected with one end of the resistor R12, the 6 terminal pin of the chip U3 is connected with one end of the gas discharge tube D4, the other end of the gas discharge tube D4 is connected with IN12, the 7 terminal pin of the chip U3 is connected with one end of the resistor R13, the 8 terminal pin of the chip U3 is connected with one end of the gas discharge tube D5, the other end of the gas discharge tube D5 is connected with IN13, the 1 terminal pin of the chip U4 is connected with one end of the resistor R14, the 2 terminal pin of the chip U4 is connected with one end of the gas discharge tube D6, the other end of the gas discharge tube D6 is connected with IN14, the 3 terminal pin of the chip U4 is connected with one end of the resistor R15, the 4 terminal pin of the chip U4 is connected with one end of the gas discharge tube D7, the other end of the gas discharge tube D7 is connected with IN15, the 5 terminal pin of the chip U4 is connected with one end of the resistor R16, the 6 terminal pin of the chip U4 is connected with one end of the gas discharge tube D8, the other end of the gas discharge tube D8 is connected with IN16, the 7 terminal pin of the chip U4 is connected with one end of the resistor R17, the 8 terminal pin of the chip U4 is connected with one end of the gas discharge tube D9, the other end of the gas discharge tube D9 is connected with IN17, the 16 terminal pin of the chip U3 is connected with one end of the resistor R11, the 14 terminal pin of the chip U3 is connected with one end of the resistor R10, the 12 terminal pin of the chip U3 is connected with one end of the resistor R9, the other end of the resistor R11, the other end of the resistor R10 and the other end of the resistor R9 are all connected with 3.3V.

[0027] The local area network communication module comprises a relay J4, a chip U5, a local area network CAN2, the 1 pin of the relay J4 is connected with the 18 pin of the chip U5, the 2 pin of the relay J4 is connected with the 17 pin of the chip U5, the 3 pin of the relay J4 is connected with the 16 pin of the chip U5, the 4 pin of the relay J4 is connected with the 15 pin of the chip U5, the 5 pin of the relay J4 is connected with the 14 pin of the chip U5, the 6 pin of the relay J4 is connected with the 13 pin of the chip U5, the 7 pin of the relay J4 is connected with the 12 pin of the chip U5, the 8 pin of the relay J4 is connected with the 11 pin of the chip U5, the 9 pin of the relay J4 is connected with the 10 pin of the chip U5, the 1 pin of the chip U5 is connected with the 4 pin of the local area network CAN2, the 2 pin of the chip U5 is connected with the 8 pin of the local area network CAN2, the 3 pin of the chip U5 is connected with the 12 pin of the local area network CAN2, the 4 pin of the chip U5 is connected with the 20 pin of the local area network CAN2, the 5 pin of the chip U5 is connected with the 22 pin of the local area network CAN2, the 6 pin of the chip U5 is connected with the 24 pin of the local area network CAN2, the 6 pin of the local area network CAN2 is connected with WIEN, the 18 pin of the local area network CAN2 is connected with YIEN, the 19 pin of the local area network CAN2 is connected with OUT3, the 17 pin of the local area network CAN2 is connected with OUT2, the 9 pin of the local area network CAN2 is connected with OUT1, and the 9 pin of the chip U5 is grounded.

[0028] In use, the display screen is configured to connect to the local area network through Ethernet or wireless wifi, the host computer queries whether the charger is idle through the local area network, the AGV reaches the charging position, the host computer issues a charging instruction, and the charger starts charging.

[0029] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A dual-band Ethernet Wi-Fi and three-in-one serial port conversion module, including a serial port conversion module, characterized in that: The serial port function module includes an Ethernet module, a control module, a data compression module, a dual-band WIFI communication module, and a local area network communication module. The Ethernet module, dual-band WIFI communication module, and local area network communication module are all connected to the control module. The Ethernet module includes capacitors C2 and C3 and a relay J2. The control module includes gas discharge tubes D11, D12, and D13, resistors R12, R13, R14, and R16, capacitor C4, inductor L1, and capacitor C6.

5. Capacitors C6, C7, and C8, chip U2, and antenna ANT1. The dual-band WIFI communication module includes chip U3, chip U4, resistors R10, R11, R12, R13, R14, R15, R16, and R17, gas discharge tubes D2, D3, D4, D5, D6, D7, D8, and D9, and resistors R11, R10, and R9.

2. The Ethernet dual-band Wi-Fi and three-in-one serial port function module according to claim 1, characterized in that: Pin 10 of relay J2, one end of capacitor C2, and one end of capacitor C3 are all grounded. Pins 14, 11, and 15 of relay J2, the other end of capacitor C2, and the other end of capacitor C3 are all connected to 3.3V. Pin 8 of relay J2 is connected to MCUTXD, pin 9 of relay J2 is connected to MCURXD, and pin 5 of relay J2 is connected to YIEN.

3. The Ethernet dual-band Wi-Fi and three-in-one serial port function module according to claim 1, characterized in that: Pin 3 of chip U2 is connected to one end of gas discharge tube D12, and the other end of gas discharge tube D12 is connected to one end of resistor R13. Pin 4 of chip U2 is connected to one end of gas discharge tube D11, and the other end of gas discharge tube D11 is connected to one end of resistor R12. Pin 31 of chip U2 is connected to one end of resistor R16, and the other end of resistor R16 is connected to one end of capacitor C4. The other end of capacitor C4 is connected to one end of inductor L1 and pin 1 of antenna ANT1. Pin 24 of chip U2 is connected to SOP1. Pin 25 of chip U2 is connected to SOP2. Pin 34 of chip U2 is connected to SOP0. Pin 36 of chip U2 is connected to WIEN. Pin 46 of chip U2 is connected to TXD. Pin 47 of chip U2 is connected to RXD.

4. The Ethernet dual-band Wi-Fi and three-in-one serial port function module according to claim 1, characterized in that: Pins 37 and 40 of chip U2, one end of capacitor C5, one end of capacitor C6, one end of capacitor C7, one end of capacitor C8, the other end of resistor R12, the other end of resistor R13, and the other end of resistor R14 are all connected to 3.3V. Pins 1, 2, 16, 26, 27, 28, 29, and 30 of chip U2, and the other end of inductor L1 are also connected to the 3V supply. The following terminals are connected to ground: pin 3 of antenna ANT1, pin 2 of antenna ANT1, pin 32 of chip U2, pin 38 of chip U2, pin 43 of chip U2, pin 55 of chip U2, pin 56 of chip U2, pin 57 of chip U2, pin 58 of chip U2, pin 59 of chip U2, pin 60 of chip U2, pin 61 of chip U2, pin 62 of chip U2, pin 63 of chip U2, the other end of capacitor C5, the other end of capacitor C6, the other end of capacitor C7, and the other end of capacitor C8.

5. The Ethernet dual-band Wi-Fi and three-in-one serial port function module according to claim 1, characterized in that: The data compression module includes a relay J6 and a resistor R15. Pins 1, 3, and 5 of the relay J6 are all connected to one end of the resistor R15. The other end of the resistor R15 is connected to 3.3V. Pin 7 of the relay J6 is connected to TXD, pin 9 of the relay J6 is connected to RXD, pin 2 of the relay J6 is connected to SOP0, pin 4 of the relay J6 is connected to SOP1, pin 6 of the relay J6 is connected to SOP2, pin 8 of the relay J6 is connected to MCURXD, and pin 10 of the relay J6 is connected to MCUTXD.

6. The Ethernet dual-band Wi-Fi and three-in-one serial port function module according to claim 1, characterized in that: Pin 1 of chip U3 is connected to one end of resistor R10. Pin 2 of chip U3 is connected to one end of gas discharge tube D2, and the other end of gas discharge tube D2 is connected to IN10. Pin 3 of chip U3 is connected to one end of resistor R11. Pin 4 of chip U3 is connected to one end of gas discharge tube D4, and the other end of gas discharge tube D4 is connected to IN11. Pin 5 of chip U3 is connected to one end of resistor R12. Pin 6 of chip U3 is connected to one end of gas discharge tube D4, and the other end of gas discharge tube D4 is connected to IN12. Pin 7 of chip U3 is connected to one end of resistor R13. Pin 8 of chip U3 is connected to one end of gas discharge tube D5, and the other end of gas discharge tube D5 is connected to IN13. Pin 1 of chip U4 is connected to one end of resistor R14. Pin 2 of chip U4 is connected to one end of gas discharge tube D6. The other end of D6 is connected to IN14. Pin 3 of chip U4 is connected to one end of resistor R15. Pin 4 of chip U4 is connected to one end of gas discharge tube D7. The other end of gas discharge tube D7 is connected to IN15. Pin 5 of chip U4 is connected to one end of resistor R16. Pin 6 of chip U4 is connected to one end of gas discharge tube D8. The other end of gas discharge tube D8 is connected to IN16. Pin 7 of chip U4 is connected to one end of resistor R17. Pin 8 of chip U4 is connected to one end of gas discharge tube D9. The other end of gas discharge tube D9 is connected to IN17. Pin 16 of chip U3 is connected to one end of resistor R11. Pin 14 of chip U3 is connected to one end of resistor R10. Pin 12 of chip U3 is connected to one end of resistor R9. The other ends of resistors R11, R10, and R9 are all connected to 3.3V.

7. The Ethernet dual-band Wi-Fi and three-in-one serial port function module according to claim 1, characterized in that: The local area network communication module includes a relay J4, a chip U5, and a local area network CAN2. Pin 1 of relay J4 is connected to pin 18 of chip U5; pin 2 of relay J4 is connected to pin 17 of chip U5; pin 3 of relay J4 is connected to pin 16 of chip U5; pin 4 of relay J4 is connected to pin 15 of chip U5; pin 5 of relay J4 is connected to pin 14 of chip U5; pin 6 of relay J4 is connected to pin 13 of chip U5; pin 7 of relay J4 is connected to pin 12 of chip U5; pin 8 of relay J4 is connected to pin 11 of chip U5; pin 9 of relay J4 is connected to pin 10 of chip U5; and pin 1 of chip U5 is connected to the local area network CAN2. Pin 4 of chip U5 is connected to pin 2 of CAN2, pin 3 of chip U5 is connected to pin 12 of CAN2, pin 4 of chip U5 is connected to pin 20 of CAN2, pin 5 of chip U5 is connected to pin 22 of CAN2, pin 6 of chip U5 is connected to pin 24 of CAN2, pin 6 of CAN2 is connected to WIEN, pin 18 of CAN2 is connected to YIEN, pin 19 of CAN2 is connected to OUT3, pin 17 of CAN2 is connected to OUT2, pin 9 of CAN2 is connected to OUT1, and pin 9 of chip U5 is grounded.

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