CN203982132U - A kind of AGV website calling set based on Internet of Things - Google Patents

Abstract

The utility model relates to an AGV site pager based on the Internet of Things. The site pager based on the Internet of Things in the utility model uses a 9V power adapter to convert 220VAC to 9VDC to supply power to the site pager, realizes voltage stabilization and decompression power supply through the power module DC/DC, and realizes data communication between the STM32W108 processor module and the wireless communication module. Then use the display module to display the system status. P6 provides USB interface and STM32W108 processor programming interface, and the STM32W108 processor can be programmed online by connecting the USB and the on-board controller with a data cable. The utility model adopts the wireless Zigbee communication design scheme of the Internet of Things technology, and the site pager placed on each station is a routing node in a Zigbee network, which can perform data communication, parameter setting and data forwarding.

Description

An AGV site pager based on the Internet of Things

technical field

The utility model belongs to the technical field of wireless control of the Internet of Things, in particular to a control device based on a wireless network for the call function of an AGV system site.

Background technique

With the gradual development of factory automation, computer integrated manufacturing system technology and the wide application of flexible manufacturing systems and automated three-dimensional warehouses, AGV (Automated Guided Vehicle) is an automatic guided vehicle that connects and adjusts discrete logistics systems to make their operations continuous The necessary means of automatic handling and loading and unloading, its application scope and technical level have been rapidly developed. AGV is an unmanned automatic guided vehicle with a microcontroller as the control core, supported by the Internet of Things technology, powered by a battery, and equipped with a non-contact guidance device. The basic functions of its automatic operation are guided driving, address recognition and parking Standardize and transfer loads. As an effective means of contemporary logistics processing automation and key equipment for flexible manufacturing systems, AGV has been more and more widely used. the

At present, the guidance methods of AGV can be divided into two categories: the fixed path guidance method outside the vehicle and the free path guidance method. The fixed path guidance method outside the vehicle refers to the information medium used for guidance on the driving path, and the AGV obtains guidance by detecting its information, such as electromagnetic guidance, optical guidance, tape guidance, etc.; free path guidance The guidance method is that the size coordinates of the system layout are stored on the AGV, and the driving path is determined autonomously by identifying the current position of the car body. This type of guidance method is also called the on-board software-programming path method. Among them, the fixed path guidance method outside the vehicle is a commonly used method.

There are four main types of equipment in the application of the AGV system, namely the on-board controller, site pager, centralized coordinator and information display. The control command of AGV is generally proposed by the site pager and sent by the centralized coordinator. The status of AGV is also sent back to the centralized coordinator through the communication system. There are two types of communication systems: continuous mode and decentralized mode. The continuous communication system allows the AGV to send and receive information at any time and from any position relative to the ground controller using radio frequency methods or using communication cables within the guidance path. Such as the use of radio, infrared laser communication methods. The decentralized system only provides communication between specific AGV equipment and the centralized coordinator at predetermined locations such as AGV call sites, on-board controllers, information displays, etc. Generally speaking, this kind of communication is realized through the method of wireless network technology, and the advantage of the decentralized communication method is that the price is relatively cheap, and the communication is reliable and stable.

The main function of the site caller in the AGV system is to install it at a specific location in the factory called the station. When materials need to be transported in or finished goods need to be shipped out at the station, the operator can press the button of the site caller to Use the Zigbee wireless network to transmit the button demand to the centralized coordinator. The site pager usually has two or more buttons, and each button represents a different type of car. The centralized coordinator will dispatch according to the situation of the car in the garage at that time The type of car required by the site caller of a station, optimize the route, specify the destination site and the behavior of each crossing along the road, and send this information to the site caller, dispatch vehicle controller and information display and other AGVs through the Zigbee wireless network equipment.

Contents of the invention

The purpose of the utility model is to provide a site pager suitable for one of the core controllers in the automatic guided vehicle system. The site pager adopts Zigbee wireless communication, status display, command sending and other functions. This site pager uses the vehicle-mounted Internet of Things technology to realize the information transmission between the operating station, the centralized coordinator and the vehicle-mounted controller.

The site pager based on the Internet of Things involved in the utility model includes an adapter power supply interface module, an STM32W108 processor module, a wireless processing module, an LED display module, a button control module and a program download interface module.

Described STM32W108 processor and wireless processing module comprise processor chip IC32, antenna ANT_SMT; The 1st, 2 pins of processor chip IC32 connect VDD33 voltage 3.3V, the 30th, 31, 32 pins of processor chip IC32 are grounded , the 37th pin of the processor chip IC32 is connected to the antenna ANT_SMT.

The adapter power interface module includes a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a second diode D2, a second inductor L2; a second diode D2 The anode is connected to the 8th and 1st pins of the voltage conversion chip IC62 and the 9V input terminal of the VCC_9V power supply, the cathode of the second diode D2 is connected to the 24V input terminal of the VCC_24V power supply, the seventh capacitor C7, the eighth capacitor C8, and the ninth capacitor C9 One end of the voltage conversion chip IC62 is connected to the 8th pin and the 1st pin, and the other end of the seventh capacitor C7, the eighth capacitor C8 and the ninth capacitor C9 are grounded; the sixth pin and the seventh pin of the voltage conversion chip IC62 pin and the third pin are grounded; one end of the second inductor L2 is connected to the ninth pin of the voltage conversion chip IC62, and the other end is VDD33 as the system power supply end; one end of the tenth capacitor C10 and the eleventh capacitor C11 is connected to VDD33 and one end of the second inductance L2, the other end of the tenth capacitor C10 and the eleventh capacitor C11 are grounded; the fifth pin of the voltage conversion chip IC62 is connected to the output terminal of the VDD33 power supply; the fourth pin of the voltage conversion chip IC62, the second pin, the 10th pin is grounded.

The key processing module includes the thirteenth capacitor C13, the fourteenth capacitor C14, the fifteenth capacitor C15, the third resistor R3, the fourth resistor R4, the fifth resistor R5, three 2-core sockets Header2, and a 6-core socket P7; one end of the third resistor R3 is connected to VDD33 voltage 3.3V, and the other end is connected to one end of the thirteenth capacitor C13 and the first pin of KEY1 and P7 of Header2; one end of the fourth resistor R4 is connected to VDD33 voltage 3.3V, and the other end is connected to One end of the fourteenth capacitor C14 and the third pin of KEY2 and P7 of Header2; one end of the fifth resistor R5 is connected to VDD33 voltage 3.3V, and the other end is connected to one end of the fifteenth capacitor C15 and the fifth pin of KEY3 and P7 of Header2 ;The other end of the thirteenth capacitor C13, the other end of the fourteenth capacitor C14, and the other end of the fifteenth capacitor C15 are grounded; the second pins of the three Header2s are grounded, and the second, fourth, and sixth pins of the 6-pin socket P7 The foot is grounded.

The LED display module includes two LED1, LED2, an eleventh resistor R11, and a twelfth resistor R12; one end of the eleventh resistor R12 is connected to the ground, and the other end is connected to the cathode of the LED2; the anode of the LED2 is connected to the input power supply VCC_24V; One end of the twelfth resistor R11 is connected to the VDD33 voltage V3.3, and the other end is connected to the eleventh pin of the processor chip IC32.

The program download interface module includes chip IC232, the first transistor VT1, the second transistor VT2, the sixth resistor R6, the ninth resistor R9, the tenth resistor R10, the seventh resistor R7, the eighth resistor R8, the tenth resistor Seventh capacitor C17, eighteenth capacitor C18, nineteenth capacitor C19, 4-core socket P6; one end of the tenth resistor R10 is connected to the 23rd pin of the chip IC232, and the other end of the tenth resistor R10 is connected to the base of the second triode VT2 One end of the ninth resistor R9 is connected to the 13th pin of the chip IC232, the other end of the ninth resistor R9 is connected to the base of the first triode VT1, one end of the sixth resistor R6 is connected to VDD33 voltage 3.3V, the sixth resistor R6 The other end is connected to the collector of the first triode VT1 and the 7th pin of the chip IC32, the emitter of the first triode VT1 is grounded, one end of the collector of the second triode VT2 is connected to the 15th pin of the chip IC32, the second The emitter of the first triode VT2 is grounded, one end of the seventh resistor R7 is connected to VDD33 voltage 3.3V, the other end of the seventh resistor R7 is connected to the first pin of the chip IC232 and the 18th pin of the chip IC32, and one end of the eighth resistor R8 Connect to VDD33 voltage 3.3V, the other end of the eighth resistor R8 is connected to the 5th pin of the chip IC232 and the 19th pin of the chip IC32, one end of the seventeenth capacitor C17 is grounded, and the other end of the seventeenth capacitor C17 is connected to the chip IC232 One end of the eighteenth capacitor C18 is grounded, the other end of the eighteenth capacitor C18 is connected to the fifth pin of the chip IC232, one end of the nineteenth capacitor C19 is grounded, and the other end of the nineteenth capacitor C19 is connected to The 17th pin of the chip IC232, the 26th, 7, 18, 21, 25th of the chip IC232 are grounded, the 17th pin of the chip IC232 outputs VDD33 voltage 3.3V, the 16th pin of the chip IC232 is connected to the 3rd pin of P6, the chip IC232 The 15th pin of the chip is connected to the 2nd pin of P6, the 20th pin of the chip IC232 is connected to the 1st pin of P6, and the other pins of the chip IC232 are all floating.

The voltage conversion chip IC62 adopts TPS62056 of TI Company, the processor chip IC32 adopts STM32W108 of ST Company, and the chip IC323 adopts FT232R of FTDI Company.

Compared with the background technology, the utility model adopts the wireless Zigbee communication design scheme of the Internet of Things technology, and the site pager placed on each station is a routing node in a Zigbee network, which can perform data communication, parameter setting and data forwarding and other functions, using the security features of Zigbee to form a safe and dedicated network for site callers and automatic guided vehicles, to manage and report the information of automatic guided vehicles in real time.

Description of drawings

Fig. 1 is the overall circuit structure schematic diagram of the present utility model;

Fig. 2 is a schematic diagram of the adapter power interface module in Fig. 1;

Fig. 3 is a schematic diagram of the button processing module in Fig. 1;

Fig. 4 is a schematic diagram of the button processing interface module in Fig. 1;

Fig. 5 is a schematic diagram of the LED display module in Fig. 1;

Fig. 6 is a schematic diagram of the STM32W108 processor module in Fig. 1;

Fig. 7 is a schematic diagram of the program download interface module in Fig. 1;

Fig. 8 is a schematic diagram of the program download interface level conversion circuit in Fig. 1;

Fig. 9 is a work flow diagram of the utility model.

Detailed ways

The purpose of this utility model is to provide a site pager suitable for placing on the station in the AGV system. When materials need to be transported in or ready goods need to be shipped out at the station, the operator can press the site pager button. The utility model adopts the wireless Zigbee communication design scheme using the Internet of Things technology. The site caller placed on each station is a routing node in a Zigbee network, which can perform functions such as data communication, parameter setting, and data forwarding. The safety features of the site pager and automatic guided vehicles form a safe and dedicated network to manage and report the information of automatic guided vehicles in real time. The transmission distance of a single node can reach 500 meters, and the transmission data speed can reach 250KBPS. The upper layer protocol data The message transmission speed can reach 100f/ms, and the downlink protocol data transmission speed can reach 50f/ms. With a command retransmission mechanism, the site pager can ensure the correct transmission of call commands and display the call status in real time.

As shown in Figure 1, the site pager based on the Internet of Things involved in the utility model includes an adapter power interface module 3, an STM32W108 processor module 1, a wireless processing module 5, an LED display module 4, a button processing module 6 and a program download interface module 2. The site pager based on the Internet of Things uses a standard 9V power adapter to convert 220VAC to 9VDC to supply power to the site pager. The power supply module DC/DC in the site pager realizes voltage regulation and decompression power supply, and the STM32W108 processor module and wireless communication module realize Data communication, and then use the LED1 and LED2 display modules to display the system status, LED1 is the system working status, when the site pager presses the button, the centralized coordinator checks whether there is a car in the garage to send? And send the status to the site pager, LED1 is always on to indicate that the car is on the road, LED1 flashes to indicate that the request has been received but there is no car in the garage to send; LED2 is the power status, if the power is insufficient, LED2 will change. P6 provides USB interface and STM32W108 processor programming interface, and the STM32W108 processor can be programmed online by connecting the USB and the on-board controller with a data cable.

As shown in Figure 2, the adapter power interface described in the utility model adopts a common power adapter connector, and the power adapter converts 220VAC to a 9VDC DC power supply, and converts the common DC/DC chip IC62 into a VDD33 interface voltage to supply power to the overall system , including a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a second diode D2, and a second inductor L2. The anode of the second diode D2 is connected to the 8th pin (EN) of the voltage conversion chip IC62, the 1st pin (VIN) and the 9V input terminal of the VCC_9V power supply, the cathode of the second diode D2 is connected to the 24V input terminal of the VCC_24V power supply, and the seventh capacitor One end of C7, the eighth capacitor C8, and the ninth capacitor C9 are connected to the 8th pin (EN) and the 1st pin (VIN) of the voltage conversion chip IC62, and the seventh capacitor C7, the eighth capacitor C8 and the ninth capacitor C9 The other end of the ground. The sixth pin (LBI), the seventh pin (SYNC) and the third pin of the voltage conversion chip IC62 are grounded. One end of the second inductor L2 is connected to the ninth pin (SW) of the voltage conversion chip IC62, and the other end is VDD33, which is the system power supply end. One end of the tenth capacitor C10 and the eleventh capacitor C11 is connected to VDD33 and one end of the second inductor L2, and the other end of the tenth capacitor C10 and the eleventh capacitor C11 is grounded. The fifth pin (FB) of the voltage conversion chip IC62 is connected to the output terminal of the VDD33 power supply. The fourth pin (PG), the second pin (LBO), and the tenth pin (PGND) of the voltage conversion chip IC62 are grounded.

As shown in FIG. 6 , the STM32W108 processor and the wireless processing module described in the present invention include a processor chip IC32 and an antenna ANT_SMT. The first and second pins of the processor chip IC32 are connected to VDD33 voltage 3.3V, and the 30th, 31st and 32nd pins of the processor chip IC32 are grounded. The 7th pin of the processor chip IC32 is connected to /RESET, the 15th pin of the processor chip IC32 is connected to BOOT, and /RESET and BOOT are connected to VT1 and VT2 through CBUS2, CBUS0 of the program download interface module. Pin 11 of the processor chip IC32 is connected to the cathode of LED1; pins 18 and 19 of the processor chip IC32 are respectively connected to two pins of TXD and RXD of the chip IC232; pins 10, 13 and 14 of the processor chip IC32 are respectively Connect the keys KEY3, KEY1 and KEY2, the 37th pin of the processor chip IC32 is connected to the antenna ANT_SMT; the other pins of the processor chip IC32 are suspended.

As shown in Figures 3 and 4, the button processing module described in the utility model includes a thirteenth capacitor C13, a fourteenth capacitor C14, a fifteenth capacitor C15, a third resistor R3, a fourth resistor R4, and a fifth resistor R5 , 3 2-core socket Header2, 6-core socket P7. One end of the third resistor R3 is connected to VDD33 voltage 3.3V, the other end is connected to the thirteenth capacitor C13 and the first pins of KEY1 and P7 of Header2; one end of the fourth resistor R4 is connected to VDD33 voltage 3.3V, and the other end is connected to the fourteenth capacitor C14 and KEY2 of Header2, the third pin of P7; one end of the fifth resistor R5 is connected to VDD33 voltage 3.3V, and the other end is connected to the fifteenth capacitor C15 and the fifth pin of KEY3 and P7 of Header2. One end of the thirteenth capacitor C13 is connected to KEY1 and the other end is grounded; one end of the fourteenth capacitor C14 is connected to KEY2 and the other end is grounded; one end of the fifteenth capacitor C15 is connected to KEY3 and the other end is grounded. The 2nd pins of the 3 Header2s are grounded, and the 2nd, 4th, and 6th pins of the 6-pin socket P7 are grounded.

As shown in FIG. 5 , the LED display module of the present invention includes two LED1, LED2, an eleventh resistor R11, and a twelfth resistor R12. One end of the eleventh resistor R12 is connected to the ground, and the other end is the cathode of the LED2. The anode of LED2 is connected to the input power supply VCC_24V. One end of the twelfth resistor R11 is connected to the VDD33 voltage V3.3, and the other end is connected to the eleventh pin (PA1) of the processor chip IC32.

As shown in Figures 7 and 8, the program download interface module described in the utility model includes a chip IC232, a first triode VT1, a second triode VT2, a sixth resistor R6, a ninth resistor R9, a tenth resistor R10, a Seventh resistor R7, eighth resistor R8, seventeenth capacitor C17, eighteenth capacitor C18, nineteenth capacitor C19, 4-pin socket P6. One end of the tenth resistor R10 is connected to the 23rd pin of the chip IC232, the other end of the tenth resistor R10 is connected to the base of the second triode VT2, one end of the ninth resistor R9 is connected to the 13th pin of the chip IC232, and the ninth resistor R9 The other end is connected to the base of the first triode VT1, one end of the sixth resistor R6 is connected to VDD33 voltage 3.3V, and the other end of the sixth resistor R6 is connected to the collector of the first triode VT1 and the seventh pin of the chip IC32. The emitter of one triode VT1 is grounded, one end of the collector of the second triode VT2 is connected to the 15th pin of the chip IC32, the emitter of the second triode VT2 is grounded, one end of the seventh resistor R7 is connected to VDD33 voltage 3.3V, the first The other end of the seven resistor R7 is connected to the 1st pin of the chip IC232 and the 18th pin of the chip IC32, one end of the eighth resistor R8 is connected to VDD33 voltage 3.3V, and the other end of the eighth resistor R8 is connected to the fifth pin of the chip IC232 and the 19th pin of the chip IC32, one end of the seventeenth capacitor C17 is grounded, the other end of the seventeenth capacitor C17 is connected to the first pin of the chip IC232, one end of the eighteenth capacitor C18 is grounded, the eighteenth capacitor C18 The other end is connected to the 5th pin of the chip IC232, one end of the nineteenth capacitor C19 is grounded, the other end of the nineteenth capacitor C19 is connected to the 17th pin of the chip IC232, the 26th, 7th, 18th, 21st, 25th pins of the chip IC232 Ground, the 17th pin of the chip IC232 outputs VDD33 voltage 3.3V, the 16th pin of the chip IC232 is connected to the 3rd pin of P6, the 15th pin of the chip IC232 is connected to the 2nd pin of P6, the 20th pin of the chip IC232 is connected to the 2nd pin of P6 1 pin, other pins of chip IC232 are floating.

The voltage conversion chip IC62, processor chip IC32, and chip IC232 used in the utility model all adopt mature products, the voltage conversion chip IC62 adopts TPS62056 of TI Company, and the processor chip IC32 adopts STM32W108 of ST Company. Header2 interface, P7 key module interface, and P6 USB interface connectors all use mature connectors. The chip IC323 uses FTDI’s FT232R, the transistor VT1 and VT2 use the more commonly used 2N3904, and the diode D1 uses 1N5408.

The working process of the utility model is shown in Figure 9. Each site pager has a unique ID value. Through the Zigbee wireless network to establish communication, the information status of the site pager can be quickly obtained, and different installations can be made according to the needs of each station. A type of pager, when materials need to be shipped in or finished goods need to be shipped out at the station, the operator can press the button of the site pager, and use the Zigbee wireless network to transmit the button demand to the centralized coordinator, the site The caller usually has two or more buttons, and each button represents a different type of car. The centralized coordinator will dispatch the car type required by the site caller of a station according to the situation of the car in the garage at that time, and optimize the route. , to specify the behavior of the destination site and each crossing along the road, and send this information to other AGV devices such as the site pager, dispatch vehicle controller, and information display through the Zigbee wireless network. Due to the adoption of the communication protocol and technology of the Internet of Things, it is possible to realize multi-point communication between the site pager, the centralized coordinator and the vehicle controller, and it is also possible to issue notifications to all site pagers in the form of broadcasting, in order to ensure that all commands are executed correctly , The upper and lower layer protocols have designed a reliable transmission mechanism.

Claims (1)

1. An AGV site pager based on the Internet of Things, comprising adapter power interface module, STM32W108 processor module, wireless processing module, LED display module, button control module and program download interface module, is characterized in that: Described STM32W108 processor and wireless processing module comprise processor chip IC32, antenna ANT_SMT; The 1st, 2 pins of processor chip IC32 connect VDD33 voltage 3.3V, the 30th, 31, 32 pins of processor chip IC32 are grounded , the 37th pin of the processor chip IC32 is connected to the antenna ANT_SMT; The adapter power interface module includes a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a second diode D2, a second inductor L2; a second diode D2 The anode is connected to the 8th and 1st pins of the voltage conversion chip IC62 and the 9V input terminal of the VCC_9V power supply, the cathode of the second diode D2 is connected to the 24V input terminal of the VCC_24V power supply, the seventh capacitor C7, the eighth capacitor C8, and the ninth capacitor C9 One end of the voltage conversion chip IC62 is connected to the 8th pin and the 1st pin, and the other end of the seventh capacitor C7, the eighth capacitor C8 and the ninth capacitor C9 are grounded; the sixth pin and the seventh pin of the voltage conversion chip IC62 pin and the third pin are grounded; one end of the second inductor L2 is connected to the ninth pin of the voltage conversion chip IC62, and the other end is VDD33 as the system power supply end; one end of the tenth capacitor C10 and the eleventh capacitor C11 is connected to VDD33 and one end of the second inductance L2, the other end of the tenth capacitor C10 and the eleventh capacitor C11 are grounded; the fifth pin of the voltage conversion chip IC62 is connected to the output terminal of the VDD33 power supply; the fourth pin of the voltage conversion chip IC62, the second pin, the 10th pin is grounded; The key processing module includes the thirteenth capacitor C13, the fourteenth capacitor C14, the fifteenth capacitor C15, the third resistor R3, the fourth resistor R4, the fifth resistor R5, three 2-core sockets Header2, and a 6-core socket P7; one end of the third resistor R3 is connected to VDD33 voltage 3.3V, and the other end is connected to one end of the thirteenth capacitor C13 and the first pin of KEY1 and P7 of Header2; one end of the fourth resistor R4 is connected to VDD33 voltage 3.3V, and the other end is connected to One end of the fourteenth capacitor C14 and the third pin of KEY2 and P7 of Header2; one end of the fifth resistor R5 is connected to VDD33 voltage 3.3V, and the other end is connected to one end of the fifteenth capacitor C15 and the fifth pin of KEY3 and P7 of Header2 ;The other end of the thirteenth capacitor C13, the other end of the fourteenth capacitor C14, and the other end of the fifteenth capacitor C15 are grounded; the second pins of the three Header2s are grounded, and the second, fourth, and sixth pins of the 6-pin socket P7 feet grounded; The LED display module includes two LED1, LED2, an eleventh resistor R11, and a twelfth resistor R12; one end of the eleventh resistor R12 is connected to the ground, and the other end is connected to the cathode of the LED2; the anode of the LED2 is connected to the input power supply VCC_24V; One end of the twelfth resistor R11 is connected to VDD33 voltage V3.3, and the other end is connected to the eleventh pin of the processor chip IC32; The program download interface module includes chip IC232, the first transistor VT1, the second transistor VT2, the sixth resistor R6, the ninth resistor R9, the tenth resistor R10, the seventh resistor R7, the eighth resistor R8, the tenth resistor Seventh capacitor C17, eighteenth capacitor C18, nineteenth capacitor C19, 4-core socket P6; one end of the tenth resistor R10 is connected to the 23rd pin of the chip IC232, and the other end of the tenth resistor R10 is connected to the base of the second triode VT2 One end of the ninth resistor R9 is connected to the 13th pin of the chip IC232, the other end of the ninth resistor R9 is connected to the base of the first triode VT1, one end of the sixth resistor R6 is connected to VDD33 voltage 3.3V, the sixth resistor R6 The other end is connected to the collector of the first triode VT1 and the 7th pin of the chip IC32, the emitter of the first triode VT1 is grounded, one end of the collector of the second triode VT2 is connected to the 15th pin of the chip IC32, the second The emitter of the first triode VT2 is grounded, one end of the seventh resistor R7 is connected to VDD33 voltage 3.3V, the other end of the seventh resistor R7 is connected to the first pin of the chip IC232 and the 18th pin of the chip IC32, and one end of the eighth resistor R8 Connect to VDD33 voltage 3.3V, the other end of the eighth resistor R8 is connected to the 5th pin of the chip IC232 and the 19th pin of the chip IC32, one end of the seventeenth capacitor C17 is grounded, and the other end of the seventeenth capacitor C17 is connected to the chip IC232 One end of the eighteenth capacitor C18 is grounded, the other end of the eighteenth capacitor C18 is connected to the fifth pin of the chip IC232, one end of the nineteenth capacitor C19 is grounded, and the other end of the nineteenth capacitor C19 is connected to The 17th pin of the chip IC232, the 26th, 7, 18, 21, 25th of the chip IC232 are grounded, the 17th pin of the chip IC232 outputs VDD33 voltage 3.3V, the 16th pin of the chip IC232 is connected to the 3rd pin of P6, the chip IC232 The 15th pin of the chip IC232 is connected to the 2nd pin of P6, the 20th pin of the chip IC232 is connected to the 1st pin of P6, and the other pins of the chip IC232 are all floating; The voltage conversion chip IC62 adopts TPS62056 of TI Company, the processor chip IC32 adopts STM32W108 of ST Company, and the chip IC323 adopts FT232R of FTDI Company.