CN106781921A - A kind of Internet of Things experimental box based on STM32 microcontrollers - Google Patents

Abstract

The invention discloses an experiment box for the Internet of Things based on an STM32 microcontroller, which includes a box body, a special platform and an additional circuit board. The platform is provided with installation grooves and installation holes; the additional circuit board is installed on the special platform and is located in the box, and the additional circuit board is provided with rows of seats; the box is installed with STM32 core unit module, sensor module, function execution module and communication module, the sensor module, function execution module and communication module are respectively connected with the STM32 core unit module, and the STM32 core unit module includes the STM32 microcontroller and its peripheral circuits. The invention solves the problem of poor flexibility and expandability of the existing experiment box, not only provides experimental equipment for the teaching and development of the Internet of Things, but also provides necessary tools for the learning and development of STM32 embedded technology, so that teaching and development can be seamlessly connected.

Description

An IoT experiment box based on STM32 microcontroller

technical field

The invention relates to an experiment box, in particular to an experiment box for the Internet of Things based on an STM32 microcontroller, which belongs to the field of experimental teaching and the field of Internet of Things development.

Background technique

The Internet of Things is an important direction for the development of science and technology in the future. The society’s demand for talents in this area is increasing day by day. Therefore, many universities have specially set up a major in the Internet of Things, but the teaching concepts and teaching equipment related to the Internet of Things still cannot keep up with this demand. .

STM32 is currently the most suitable microcontroller for the Internet of Things. It has abundant resources, low cost, and low barriers to use. However, there are very few STM32-based IoT experiment boxes on the market, and most of them do not have enough sensors and system IoT ideas for teaching and development. Not only that, the experimental circuit of the experimental box on the market is fixed, and it cannot be used for learning STM32, which increases the cost of the entire Internet of Things teaching. Such a test box has poor flexibility and scalability, which is not conducive to the inflow of new blood in the Internet of Things industry and its growth and development.

Contents of the invention

The purpose of the present invention is to provide a kind of experiment box of Internet of things based on STM32 microcontroller, this experiment box has solved the above-mentioned problem of poor flexibility and expansibility of existing experiment box, not only provides experimental equipment for the teaching and development of Internet of Things, but also for The learning and development of STM32 embedded technology provides the necessary tools for seamless connection between teaching and development.

The purpose of the present invention can be achieved by taking the following technical solutions:

A kind of Internet of things experimental box based on STM32 microcontroller, comprises box body, special platform and additional circuit board; Described special platform is installed in box body, is provided with mounting groove and mounting hole on special platform; Described additional circuit board is installed On the special platform and located in the box, the additional circuit board is provided with row seats; the STM32 core unit module, the sensor module, the function execution module and the communication module are installed in the box through the installation groove, the installation hole and the row seat. The sensor module, the function execution module and the communication module are respectively connected with the STM32 core unit module. The STM32 core unit module includes the STM32 microcontroller and its peripheral circuits. The STM32 core unit module is the MCU of the experiment box and serves as the brain of the experiment box. Experimenters can conduct part of the Internet of Things simulation experiments only with this module, peripheral circuits such as clock circuits, filter circuits, various programming and data transmission interface circuits, LCD screen interface circuits, TF card interface circuits, etc.

Preferably, a box cover is also included, and the box cover is connected with the box body through a fixing buckle.

Preferably, a pocket is configured on the lid of the box, and the pocket is used to place various manuals of the experiment box and CDs containing electronic documents and codes.

Preferably, the special platform is composed of five acrylic plates, and is fixedly installed in the box through screws and mounting holes, and a raised positioning bar is provided on the installation groove, and the special platform is installed in the box as a whole. It is not easy to separate from the box, making the experiment box stronger, and the module is installed on a special platform to increase the stability of the module.

Preferably, the special platform has a reserved space, an accessory slot is formed between the reserved space and the bottom of the box, and an emulator, a downloader, and two matching emulators and downloaders are placed in the accessory slot. USB cable, several Dupont cables for circuit connection, and a 5V output AC-to-DC plug; in addition, the accessory slot can also place other devices according to different needs.

Preferably, a power supply module is provided between the special platform and the bottom of the box body, and the power supply module adopts a 220V AC to 5V DC step-down module to provide four 5V USB power interfaces, and the 220V mains power passes through the step-down module to provide The stable 5V DC power supply meets the voltage requirements of all modules of the experiment box.

Preferably, the additional circuit board is fixedly mounted on the special platform through the cooperation of screws and mounting holes, and some modules can be freely plugged and unplugged on the additional circuit board, so that the pins of some modules are led to the surface of the special platform, which provides convenience for connection , to present the circuit connection more intuitively for the experimenter; this setting improves the usability and flexibility of the experiment box, helps to improve the experimental effect, and is easy for the experimenter to understand.

Preferably, the sensor module is the signal source of the experiment box, which provides real-time data for the experiment, and it includes a stepper motor and its drive module, a DC motor and its drive module, a steering gear pan-tilt drive module, a steering gear drive module, Infrared remote control module, game joystick module, sound player module and relay module; the sensor module can transmit the collected data to the STM32 core unit module, after analysis and processing, and then drive the function execution module according to the program to realize the specific function Motion and control, or sending collected data to specific devices.

Preferably, the function execution module is an important part of the intelligent Internet of Things, controlled by the STM32 core unit module, and can intelligently respond to the data of the sensor module, which includes a stepper motor and its drive module, a DC motor and its drive module , steering gear gimbal drive module, steering gear drive module, infrared remote control module, game joystick module and relay module.

Preferably, the communication module is an information bridge between the STM32 core unit module and the external device, which includes an Ethernet module, a Bluetooth module, a NRF2401 wireless module, a Wi-Fi serial port module, a ZigBee module, a GPS positioning module and a GSM/ GPRS module; the data collected by the sensor module, after analysis and processing, will carry out real-time data transmission and information exchange through the communication module according to the pre-established communication specifications.

Compared with the prior art, the present invention has the following beneficial effects:

1. The present invention adopts modular placement, allowing the experimenter to wire independently, and let the experimenter understand the circuit in an intuitive way, instead of fixing the circuit and only operating in the software; not only can the module be installed in the box through a special platform, Moreover, the pins of some modules can be led to the surface of the special platform through the additional circuit board, which facilitates the connection and presents the circuit connection for the experimenter more intuitively. The effect is easy for the experimenter to understand.

2. In the present invention, all modules are classified and fixedly installed in the box according to the module functions. The experimenter can flexibly select one or more modules for experiment or development according to the purpose and requirements of the experiment, which can effectively enhance the flexibility of the experiment box and allow the experimenter Clearly understand the function of the modules and their connection with the STM32 microcontroller during the experiment, and reduce the interference between the modules. It is mainly suitable for the learning and development of the Internet of Things technology based on the STM32 microcontroller, but the resources in the box can also take into account other Internet of things technology learning and development of type microcontroller.

3. The experimental box of the present invention is equipped with a large number of sensor modules and communication modules, which expands the available Internet of Things experiments with abundant resources. Such an experimental box design develops the advantages of the existing Internet of Things experimental boxes and makes up for them. It provides a better cornerstone for the development of the Internet of Things industry.

Description of drawings

Fig. 1 is a schematic structural diagram of the Internet of Things experiment box of the present invention.

Fig. 2 is a schematic diagram of the split structure of the box body and the special platform in the IoT experiment box of the present invention.

Fig. 3 is a partition diagram of each module in the Internet of Things experiment box of the present invention.

Fig. 4 is a structural schematic diagram of a special platform in the Internet of Things experiment box of the present invention.

Fig. 5 is an electronic circuit diagram of an additional circuit board in the IoT experiment box of the present invention.

Among them, 1-box body, 2-box cover, 3-special platform, 4-additional circuit board, 5-STM32 core unit module, 6-sensor module, 7-function execution module, 8-communication module, 9-reserved space, 10 - accessory slots.

detailed description

The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

Example 1:

As shown in Figures 1 and 2, the IoT experiment box of this embodiment includes a box body 1, a box cover 2, a special platform 3 and an additional circuit board 4, and the box cover 2 is connected to the box body 1 through a fixing buckle, so that The special platform 3 is installed in the box body 1, and the additional circuit board 4 is installed on the special platform 3 and located in the box body 1.

The STM32 core unit module 5, the sensor module 6, the function execution module 7 and the communication module 8 are installed in the box body 1, and the partitions of each module are shown in Figure 3, the sensor module 6 is placed in the left area, and the STM32 core is placed in the upper area The unit module 5, the function execution module 7 is placed in the middle area, and the communication module 8 is placed in the right and lower areas.

Described STM32 core unit module 5 comprises STM32 micro-controller and peripheral circuit thereof, and STM32 core unit module is the MCU (Microcontroller Unit, micro control unit) of experiment box, acts as the brain of experiment box, and experimenter only can carry out with this module. Part of the Internet of Things simulation experiment, peripheral circuits such as clock circuits, filter circuits, various programming and data transmission interface circuits, LCD screen interface circuits, TF card interface circuits, etc.

Described sensor module 6 is the signal source of experiment box, provides real-time data for experiment, and it comprises temperature sensor module, distance sensor module (such as HC-SR04 ultrasonic distance measuring module), infrared induction module, sound sensor module (such as LD3320 voice Identification module), multi-axis motion sensor module (such as MPU6050 six-axis sensor), camera module and radio frequency identification (Radio Frequency Identification, RFID) module; the sensor module can transmit the collected data to the STM32 core unit module, after analysis and After processing, the function execution module is driven according to the program to realize the movement and control of specific functions, or send the collected data to a specific device.

The function execution module 7 is an important part of the intelligent Internet of Things, controlled by the STM32 core unit module, which can intelligently respond to the data of the sensor module, which includes a stepping motor and its driving module, a DC motor and its driving module, a rudder PTZ driver module, servo driver module, infrared remote control module, joystick module, sound player module (such as MP3 player module, SYN6288 voice player module) and relay module.

Described communication module 8 is the information bridge between STM32 core unit module and external device, and it comprises Ethernet module, bluetooth module (such as HC-05 bluetooth module), NRF2401 wireless module, Wi-Fi serial port module (such as ESP8266Wi- Fi to serial port module), ZigBee module, GPS positioning module and GSM/GPRS module; after the data collected by the sensor module is analyzed and processed, real-time data transmission and information exchange are carried out through the communication module according to the pre-established communication specifications.

A pocket is configured on the box cover 2, and the pocket is used to place various manuals of the experiment box and CDs containing electronic documents and codes.

The special platform 3 is composed of five acrylic plates, and its structure is shown in Figure 4. There is a reserved space 9 on the left side of the special platform 3, and an accessory is formed between the reserved space 9 and the inner bottom of the box body 1. Slot 10, as can be seen from the partition in Figure 3, accessory slot 10 is located on the left side of sensor module 6, and accessory slot 10 places an emulator, a downloader, two USB cables supporting the emulator and downloader, several Dupont wire for circuit connection and a 5V output AC to DC plug; in addition, the accessory slot can also place other devices according to different needs;

A power supply module is provided between the special platform 3 and the inner bottom of the box body 1. The power supply module adopts a 220V AC to 5V DC step-down module, provides four 5V USB power interfaces, and connects the 5V output AC to DC plug with the After the socket of the 220V mains is connected, the 220V mains can output four 5V DC regulated power supplies through the step-down module to meet the voltage requirements of all modules in the experiment box; during the experiment, the experimenter connects the power interface of the step-down module with the The STM32 core unit module 5 is connected to provide VCC and GND for the STM32 core unit module 5 and the entire experiment or development project. At the same time, according to the experiment or development requirements, the selected module is connected to the STM32 core unit module 5 through a DuPont line, thereby completing the entire process. The connection function of VCC, GND and other signal lines for experiments or development projects; in addition, if serial communication or program programming is required, the emulator, downloader and supporting USB cable in the accessory slot can be used for communication and program programming .

The special platform 3 is provided with installation slots and installation holes, the installation slots are provided with raised positioning strips, and each module is installed according to the partitions in Figure 3, the modules with corresponding installation slots are placed in the installation slots, and the modules are fixed by the positioning strips , the modules with corresponding installation holes are fixed on the special platform 3 with screws and the installation holes, and the installation holes on the special platform 3 can also be fixed in the box body 1 with screws, and the special platform 3 is installed in the box body 1 as a whole , It is not easy to separate from the box body 1, making the experiment box stronger, and the module is installed on a special platform 3 to increase the stability of the module.

Due to packaging limitations, some modules need to use the additional circuit board 4 for installation and line transfer. The structure of the additional circuit board 4 is shown in Figure 5. The additional circuit board 4 is fixed and installed on the special platform 3 through screws and mounting holes. , there are rows of seats on it, and some modules can be freely plugged and unplugged on the additional circuit board through the jacks on the row of seats, so that the pins of some modules are led to the surface of the special platform 3, which provides convenience for connection and is more intuitive for experiments. The operator presents the circuit connection. During the experiment, the experimenter can complete the connection required for the experiment by connecting the pin headers on the additional circuit board. This setting improves the usability and flexibility of the experiment box, which is conducive to improving the experimental effect and is easy to experiment. The reader understands that, as can be seen from FIG. 5 , multiple rows of seats on the additional circuit board 4 can be installed with MPU6050 six-axis sensor, ZigBee module, Wi-Fi to serial port module, NRF2401 wireless module, and SYN6288 voice playback module.

Apply different modules to connect with STM32 development board or STM32 core board, such as precision thermometer experiment, temperature and humidity experiment, infrared remote control receiving experiment, smoke detection experiment, MP3 audio input and output experiment, speech recognition and control experiment, text-to-speech experiment Recognition experiment, MPU6050 acceleration gyroscope experiment, image acquisition output experiment, relay control experiment, stepper motor control experiment, DC motor control experiment, multi-angle steering gear pan-tilt control experiment, WIFI to serial port communication experiment, Ethernet set-up and communication experiment , NRF2401 wireless module communication experiment, HC05 Bluetooth communication experiment, RFID radio frequency communication experiment, GPS positioning and communication experiment, GSM 4G communication experiment, Zigbee wireless network construction and communication experiment and other experimental verification and development applications, so that experimenters can learn in simple terms and step by step and master the relevant knowledge of the Internet of Things.

All the modules in this embodiment are usually in a fixed state to facilitate the arrangement of the experimental box and improve the integrity of the equipment. However, in special cases, experimenters are also allowed to dismantle some modules of the experimental box to meet their experiments and development. This solution meets the various needs of experimenters. It can not only conduct experiments according to the layout of the experiment box in the course, standardize the experiment process, but also disassemble some modules for easy connection with the STM32 microcontroller, which is conducive to openness outside the course. permanent experiments and application development; these modules can be removed together with the STM32 microcontroller, and open experiments can be carried out in places not limited to laboratories, such as factories, homes, dormitories, etc., without bringing the experiment box to the open experiment location Trouble.

In summary, the present invention selects the STM32 microcontroller, which is rich in resources and low in threshold, and is compatible with a large number of development and application modules, and can carry out a large number of basic experiments and engineering application development of the Internet of Things, which not only provides a carrier for teaching, but also It provides a bridge for experimenters to transition from learning to actual development, and gets rid of the limitations of the existing IoT experiment box with fewer modules and poor flexibility.

Since all the development and application modules of the present invention are easy to install and disassemble, if a module is damaged or needs to be upgraded, it is not necessary to replace the entire experimental box, but only to replace or upgrade the corresponding modules, thereby reducing the cost of damage and upgrading. Cost, making the cost of IoT technology learning lower.

Those skilled in the art should understand that the embodiments of the present invention shown in the above description and accompanying drawings are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although there are detailed descriptions of the embodiments of the present invention above, this Those skilled in the art can still modify the above technical solutions, or perform equivalent replacements for the same purpose. All modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. a kind of Internet of Things experimental box based on STM32 microcontrollers, it is characterised in that：Including casing, special platform and attached Plus circuit board；The special stage+module is provided with mounting groove and mounting hole in casing on special platform；The adjunct circuit Plate is arranged on special platform, and in casing, the row's of being provided with seat in additional circuit boards；In the casing by mounting groove, Mounting hole and row's seat are provided with STM32 core unit modules, sensor assembly, function performing module and communication module, the biography Sensor module, function performing module and communication module are connected with STM32 core unit modules respectively, the STM32 core cells Module includes STM32 microcontrollers and its peripheral circuit.

2. a kind of Internet of Things experimental box based on STM32 microcontrollers according to claim 1, it is characterised in that：Also wrap Case lid is included, the case lid is connected by clip with casing.

3. a kind of Internet of Things experimental box based on STM32 microcontrollers according to claim 2, it is characterised in that：It is described A pocket is configured with case lid, the pocket is used to place the various specifications and the light comprising electronic document, code of experimental box Disk.

4. a kind of Internet of Things experimental box based on STM32 microcontrollers according to claim 1, it is characterised in that：It is described Special platform is combined by five pieces of acrylic boards, and is fixedly mounted in casing by screw and mounting hole cooperation, the peace The positioning strip of projection is provided with tankage.

5. a kind of Internet of Things experimental box based on STM32 microcontrollers according to claim 1, it is characterised in that：It is described Special platform has headspace, and an accessory slot is formed between the headspace and casing inner bottom part, and the accessory slot is placed One emulator, downloader, two USB lines supporting with emulator and downloader, some be used for what circuit was connected The exchange of Du Pont's line and a 5V outputs turns DC plug.

6. a kind of Internet of Things experimental box based on STM32 microcontrollers according to claim 5, it is characterised in that：It is described Power supply module is provided between special platform and casing inner bottom part, the power supply module turns 5V DC decompression moulds using 220V exchanges Block, there is provided the USB power source interface of four road 5V.

7. a kind of Internet of Things experimental box based on STM32 microcontrollers according to claim 1, it is characterised in that：It is described Additional circuit boards are fixedly mounted on special platform by screw with mounting hole cooperation.

8. a kind of Internet of Things experimental box based on STM32 microcontrollers according to claim any one of 1-7, its feature exists In：The sensor assembly includes temperature sensor module, distance sensor module, infrared induction module, sound transducer mould Block, multiaxial motion sensor assembly, camera module and radio frequency identification module.

9. a kind of Internet of Things experimental box based on STM32 microcontrollers according to claim any one of 1-7, its feature exists In：The function performing module includes that stepper motor and its drive module, direct current generator and its drive module, steering wheel head drive Module, servo driving module, infrared remote control module, joystick module, sound broadcasting module and relay module.

10. a kind of Internet of Things experimental box based on STM32 microcontrollers according to claim any one of 1-7, its feature It is：The communication module include ethernet module, bluetooth module, NRF2401 wireless modules, Wi-Fi turn serial port module, ZigBee module, d GPS locating module and GSM/GPRS modules.