Interactive Internet of Things development board

Abstract

The invention discloses an interactive Internet of Things development board, and relates to the technical field of interactive Internet of Things development. The main control module supports WIFI (Wireless Fidelity) and Bluetooth communication; the power supply module is used for providing multiple paths of power supply voltages; the motor driving module is used for driving the motor; the signal switching module is used for switching a motor power supply and a sensor power supply; the display screen module is used for displaying interaction contents; the power supply and communication module is used for transmitting data signals; and the expansion interface module is used for connecting an external expansion module. According to the invention, the power supply module, the signal switching module, the display screen module, the power supply and communication module and the expansion interface module are integrated on the printed circuit board, so that a user can define the specific usage of an expansion interface according to own development requirements, and the compatibility problem caused by voltage mismatching between modules of different manufacturers and a development board is solved; the switching between the motor power supply and the sensor power supply is realized, and the expansibility and interactivity of the development board are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of interactive Internet of Things development, and in particular to an interactive Internet of Things development board. Background Art

[0002] Currently, IoT development boards on the market are bulky due to their numerous modules. Furthermore, most users only utilize a few of these multi-functional boards, making them less suitable for product development. In the consumer electronics sector, the vast majority of products require development boards for testing. However, compatibility issues between modules and boards from different manufacturers can lead to malfunctions or limited functionality, resulting in extremely low scalability. This hinders secondary product development and increases development difficulty and cost.

[0003] Therefore, the existing technology still needs to be improved and developed. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide an interactive Internet of Things development board to solve the problem of low scalability of existing Internet of Things development boards.

[0005] The technical solutions of the present invention are as follows:

[0006] An interactive Internet of Things development board, comprising:

[0007] printed circuit boards;

[0008] A main control module supporting WIFI and Bluetooth communications is provided on the printed circuit board;

[0009] A power supply module for providing multiple power supply voltages, disposed on the printed circuit board and connected to the main control module;

[0010] a motor driving module for driving the motor, disposed on the printed circuit board and connected to the main control module;

[0011] A signal switching module for switching the motor power supply and the sensor power supply is provided on the printed circuit board and is connected to the main control module and the motor drive module respectively;

[0012] A display screen module for displaying interactive content, disposed on the printed circuit board and connected to the main control module;

[0013] A power supply and communication module for transmitting data signals, disposed on the printed circuit board and connected to the main control module;

[0014] An expansion interface module for connecting to an external expansion module is provided on the printed circuit board and connected to the main control module.

[0015] A further configuration of the present invention further includes: an onboard expansion module, which is arranged on the printed circuit board and is respectively connected to the main control module and the power supply module.

[0016] According to a further configuration of the present invention, the main control module includes: a main control chip, a first resistor, a second resistor, a first switch, a first light emitting diode, a first capacitor, a second capacitor and a buzzer;

[0017] One end of the first switch is connected to one end of the first resistor and the enable end of the main control chip respectively, and the other end of the first switch is grounded;

[0018] The other end of the first resistor is connected to the chip power supply voltage; the power supply end of the main control chip is connected to the chip power supply voltage;

[0019] The first capacitor is connected between the other end of the first resistor and the ground;

[0020] The second capacitor is connected to both ends of the first switch;

[0021] The anode of the first light-emitting diode is connected to the main control chip, the cathode of the first light-emitting diode is connected to one end of the second resistor, and the other end of the second resistor is grounded;

[0022] The positive pole of the buzzer is connected to the main control chip, and the negative pole of the buzzer is grounded.

[0023] In a further configuration of the present invention, the power module includes: a first battery, a second battery, a first diode, a second diode, a main power switch, a first voltage conversion chip, a second voltage conversion chip, a third diode, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a second light-emitting diode, and a third resistor;

[0024] The first diode is connected between the first battery and the second battery, and the second diode is connected between the second battery and the input terminal of the main power switch;

[0025] The output end of the main power switch is connected to the input end of the first voltage conversion chip;

[0026] The output end of the first voltage conversion chip is connected to the anode of the third diode, and the cathode of the third diode is connected to the input end of the second voltage conversion chip;

[0027] The output end of the second voltage conversion chip is connected to the anode of the second light-emitting diode, the cathode of the second light-emitting diode is connected to one end of the third resistor, and the other end of the third resistor is grounded;

[0028] One end of the third capacitor is connected to the output end of the main power switch, and the other end of the third capacitor is grounded;

[0029] The fourth capacitor is connected in parallel with the third capacitor;

[0030] The fifth capacitor is connected to the output terminal of the first voltage conversion chip, and the other end of the fifth capacitor is grounded;

[0031] The sixth capacitor is connected in parallel with the fifth capacitor;

[0032] The seventh capacitor is connected in parallel with the sixth capacitor;

[0033] One end of the eighth capacitor is connected to the output end of the second voltage conversion chip, and the other end of the eighth capacitor is grounded.

[0034] According to a further configuration of the present invention, the motor driving module includes: a motor driving chip, a fourth diode, a fourth resistor, a fifth resistor, a ninth capacitor, a tenth capacitor, an eleventh capacitor and a third light emitting diode;

[0035] The anode of the fourth diode is connected to the motor drive power supply voltage, and the cathode of the fourth diode is connected to one end of the fourth resistor, the power pin of the motor drive chip, and the anode of the third light-emitting diode respectively;

[0036] The other end of the fourth resistor is connected to the sleep pin of the motor driver chip;

[0037] The cathode of the third light emitting diode is connected to one end of the fifth resistor, and the other end of the fifth resistor is grounded;

[0038] One end of the ninth capacitor is connected to the power pin of the motor driver chip, and the other end of the ninth capacitor is grounded;

[0039] One end of the tenth capacitor is connected to the voltage stabilization output pin of the motor driving chip, and the other end of the tenth capacitor is grounded;

[0040] One end of the eleventh capacitor is connected to the power pin of the motor driving chip, and the other end of the eleventh capacitor is connected to the driving voltage pin of the motor driving chip.

[0041] In a further configuration of the present invention, the power supply and communication module includes: a USB to serial port chip, a sixth resistor, a seventh resistor, a twelfth capacitor, a first transistor, a second transistor, an eighth resistor, a ninth resistor, a fifth diode, a TYPE-C interface, a tenth resistor, and an eleventh resistor;

[0042] One end of the sixth resistor is connected to the receiving pin of the USB-to-serial port chip, and the other end of the sixth resistor is connected to the main control chip;

[0043] One end of the seventh resistor is connected to the transmitting pin of the USB-to-serial port chip, and the other end of the seventh resistor is connected to the main control chip;

[0044] The collector of the first transistor is connected to the enable pin of the main control chip, the emitter of the first transistor is connected to the fourteenth pin of the USB-to-serial port chip, the base of the first transistor is connected to one end of the eighth resistor, and the other end of the eighth resistor is connected to the thirteenth pin of the USB-to-serial port chip;

[0045] The collector of the second transistor is connected to the 25th pin of the main control chip, the emitter of the second transistor is connected to the 13th pin of the USB-to-serial port chip, the base of the second transistor is connected to one end of the ninth resistor, and the other end of the ninth resistor is connected to the 14th pin of the USB-to-serial port chip;

[0046] The TYPE-C interface is provided on the printed circuit board and is used to connect to an external TYPE-C interface device;

[0047] The anode of the fifth diode is connected to the power pin of the TYPE-C interface;

[0048] One end of the tenth resistor is connected to the first detection end of the TYPE-C interface, and the other end of the tenth resistor is grounded;

[0049] One end of the eleventh resistor is connected to the second detection end of the TYPE-C interface, and the other end of the eleventh resistor is grounded.

[0050] In a further configuration of the present invention, the display screen module includes: a first onboard switch, a second onboard switch, a twelfth resistor, a thirteenth resistor and a display screen interface;

[0051] The first onboard switch is connected to the power module and the main control chip respectively;

[0052] The second onboard switch is connected to the power module and the main control chip respectively;

[0053] One end of the twelfth resistor is connected to the main control chip and the fourth pin of the first onboard switch respectively, and the other end of the twelfth resistor is grounded;

[0054] One end of the thirteenth resistor is connected to the main control chip and the fourth pin of the onboard switch respectively, and the other end of the fourth resistor is grounded;

[0055] The display screen interface is connected to the main control chip.

[0056] According to a further configuration of the present invention, the onboard expansion module includes: a PS2 interface, a thirteenth capacitor and a resistor;

[0057] The PS2 interface is connected to the main control chip;

[0058] One end of the thirteenth capacitor is connected to the power pin of the PS2 interface, and the other end of the thirteenth capacitor is grounded;

[0059] The resistor is connected between the main control chip and the PS2 interface.

[0060] According to a further configuration of the present invention, the expansion interface module includes a sensor interface and an external actuator interface, the sensor interface is connected to the main control chip, and the external actuator interface is connected to the main control chip.

[0061] According to a further configuration of the present invention, the expansion interface module is a fool-proof interface.

[0062] The present invention provides an interactive Internet of Things development board, which includes: a printed circuit board; a main control module supporting WIFI and Bluetooth communication; a power supply module for providing multiple power supply voltages; a motor drive module for driving a motor, which is arranged on the printed circuit board and connected to the main control module; a signal switching module for switching between motor power and sensor power; a display screen module for displaying interactive content; a power supply and communication module for transmitting data signals; and an expansion interface module for connecting to an external expansion module. By integrating the power supply module, the signal switching module, the display screen module, the power supply and communication module, and the expansion interface module on the printed circuit board, the present invention allows users to freely define the specific usage of the expansion interface according to their own development needs, breaking the limitation of the traditional fixed interface function, enhancing the adaptability of the development board to different application scenarios, and solving the compatibility problem caused by voltage mismatch between modules from different manufacturers and the development board. Furthermore, the present invention realizes switching between motor power and sensor power, can adapt to different working scenarios, improves the scalability and interactivity of the development board, and reduces the difficulty and cost of secondary development of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary personnel in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0064] Figure 1 This is a principle block diagram of the interactive Internet of Things development board in the present invention.

[0065] Figure 2 It is a circuit schematic diagram of the main control module in the present invention.

[0066] Figure 3 It is a circuit schematic diagram of the power module in the present invention.

[0067] Figure 4 This is a circuit schematic diagram of the motor drive module and the signal switching module in the present invention.

[0068] Figure 5 It is a circuit schematic diagram of the power supply and communication module in the present invention.

[0069] Figure 6 This is a circuit diagram of the display screen module and the onboard expansion module in the present invention.

[0070] Figure 7 It is a circuit principle diagram of the expansion interface module in the present invention. DETAILED DESCRIPTION

[0071] The present invention provides an interactive Internet of Things development board. To make the objectives, technical solutions, and effects of the present invention more clear and explicit, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0072] In the embodiments and patent claims, unless otherwise specified herein, the words "a," "an," "the," and "the" may include plural forms. If the embodiments of the present invention include descriptions of "first," "second," etc., such descriptions are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly specifying the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features.

[0073] It should be further understood that the term "comprising" used in the description of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when an element is said to be "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or there can be intermediate elements. In addition, "connected" or "coupled" as used herein can include wireless connections or wireless couplings. The term "and / or" as used herein includes all or any units and all combinations of one or more of the items listed in association.

[0074] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0075] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0076] Please also see Figures 1 to 7 , the present invention provides a preferred embodiment of an interactive Internet of Things development board.

[0077] In some embodiments, as Figure 1 As shown, the present invention provides an interactive Internet of Things development board, which includes: a printed circuit board 10; a main control module 100 supporting WIFI and Bluetooth communication, which is arranged on the printed circuit board; a power supply module 200 for providing multi-channel power supply voltage, which is arranged on the printed circuit board 10 and connected to the main control module 100; a motor drive module 300 for driving a motor, which is arranged on the printed circuit board 10 and connected to the main control module 100; a signal switching module 400 for switching motor power and sensor power, which is arranged on the printed circuit board 10 and respectively connected to the main control module 100 and the motor drive module 300; a display screen module 500 for displaying interactive content, which is arranged on the printed circuit board 10 and connected to the main control module 100; a power supply and communication module 600 for transmitting data signals, which is arranged on the printed circuit board 10 and connected to the main control module 100; and an expansion interface module 700 for connecting an external expansion module, which is arranged on the printed circuit board 10 and connected to the main control module 100.

[0078] In this embodiment, the main control module 100 , the power module 200 , the motor drive module 300 , the signal switching module 400 , the display module 500 , the power supply and communication module 600 and the expansion interface module 700 are all integrated on the printed circuit board 10 .

[0079] The main control module 100 supports both Wi-Fi and Bluetooth communication modes. Powered by the power module 200, it enables communication with the motor driver module 300, the signal switching module 400, the display module 500, the power supply and communication module 600, and the expansion interface module 700. The power module 200 can power the entire circuit, providing voltages of 7.2V, 5V, and 3.3V, enabling multiple voltage outputs and adapting to expansion modules with different operating voltage requirements. For example, the motor driver typically requires a higher voltage (such as 7.2V) to provide sufficient power; the TFT interactive display and traditional sensor modules can be powered by 5V; and low-power modules such as the PS2 controller module can be powered by 3.3V. This effectively resolves compatibility issues caused by voltage mismatches between modules from different manufacturers and the development board, reducing not only development difficulty but also the additional costs associated with adaptation issues, creating favorable conditions for secondary product development and further enhancing the scalability of the development board. The motor driver module 300 is used to drive the motor actuator. The signal switching module 400 can realize the switching between the motor power supply and the sensor power supply in actual Internet of Things applications, so as to adapt to different working scenarios. The display screen module 500 can clearly display the interactive content between the development board and the user, such as data display, operation prompts, etc. The power supply and communication module 600 can realize the communication conversion between USB and serial port, which is convenient for the computer to carry out data transmission and program download with the development board through the USB interface, and can realize power supply and communication functions, and transmit power and data signals. The extended interface module 700 includes several extended interfaces, which can exchange data with external modules and receive external sensor data, such as temperature, humidity sensor data, etc. At the same time, it can also send control signals to external actuators, such as controlling motor rotation, servo swing, etc.

[0080] According to the above technical solution, by integrating the power module 200, the signal switching module 400, the display module 500, the power supply and communication module 600 and the expansion interface module 700 on the printed circuit board, the integration is high, and the user can freely define the specific usage of the expansion interface according to his own development needs, breaking the limitation of the fixed function of the traditional interface, enhancing the adaptability of the development board to different application scenarios, and solving the compatibility problem caused by voltage mismatch between modules and development boards of different manufacturers, and further realizing the switching between motor power supply and sensor power supply. The present invention can adapt to different working scenarios, improve the integration, scalability and interactivity of the development board, reduce the difficulty and cost of secondary development of the product, effectively lower the technical threshold of developers, attract more people to engage in the development of the Internet of Things, promote the popularization of Internet of Things technology in daily life, and promote the widespread application of smart homes, improving the convenience and comfort of residents' lives.

[0081] In some embodiments, as Figure 1 As shown, the interactive Internet of Things development board also includes: an onboard expansion module 800, which is arranged on the printed circuit board and is respectively connected to the main control module 100 and the power module 200, which can further improve the scalability of the development board and improve the interaction performance between the user and the development board.

[0082] In some embodiments, as Figure 1 and Figure 2 As shown, the main control module 100 includes: a main control chip U1, a first resistor R1, a second resistor R2, a first switch SW1, a first light-emitting diode LED1, a first capacitor C1, a second capacitor C2 and a buzzer BUZZER1. One end of the first switch SW1 is respectively connected to one end of the first resistor R1 and the enable end of the main control chip U1, and the other end of the first switch SW1 is grounded; the other end of the first resistor R1 is connected to the chip power supply voltage; the power end of the main control chip U1 is connected to the chip power supply voltage; the first capacitor C1 is connected between the other end of the first resistor R1 and the ground; the second capacitor C2 is connected to both ends of the first switch SW1; the anode of the first light-emitting diode LED1 is connected to the main control chip U1, the cathode of the first light-emitting diode LED1 is connected to one end of the second resistor R2, and the other end of the second resistor R2 is grounded; the positive electrode of the buzzer BUZZER1 is connected to the main control chip U1, and the negative electrode of the buzzer BUZZER1 is grounded.

[0083] In this embodiment, the main control chip U1 supports Wi-Fi and Bluetooth communication modes and is powered by the 3.3V voltage provided by the power module. The first resistor R1 cooperates with the first switch SW1 to change the circuit state when the first switch SW1 is pressed, providing an appropriate level signal to the enable pin of the main control chip U1 for enabling the main control chip U1. The first capacitor C1 and the second capacitor C2 act as filters, filtering high- and low-frequency noise in the power supply and providing a stable power input to the main control chip U1, ensuring stable circuit operation. The first switch SW1 is a manual control element that triggers circuit changes when pressed, controlling the enable pin of the main control chip U1 to turn the main control chip U1 on or off. The first light-emitting diode LED1 indicates the operating status of the circuit and is current-limited by the second resistor, emitting light when an appropriate current flows through it. The second resistor R2 limits the current of the first light-emitting diode LED1, preventing damage due to excessive current. The buzzer BUZZER1 serves as an onboard audio output and can emit sound signals to provide sound prompts, play simple audio, or implement alarm functions, thus enriching the interaction mode.

[0084] In some embodiments, as Figure 1 and Figure 3As shown, the power module 200 includes: a first battery BT1, a second battery BT2, a first diode D1, a second diode D2, a main power switch SW4, a first voltage conversion chip U17, a second voltage conversion chip U18, a third diode D3, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a second light-emitting diode LED2, and a third resistor R3; the first diode D1 is connected between the first battery BT1 and the second battery BT2, and the second diode D2 is connected between the second battery BT2 and the input end of the main power switch SW4; the output end of the main power switch SW4 is connected to the input end of the first voltage conversion chip U17; the output end of the first voltage conversion chip U17 is connected to the anode of the third diode D3, and the anode of the third diode D3 is connected. The cathode is connected to the input end of the second voltage conversion chip U18; the output end of the second voltage conversion chip U18 is connected to the anode of the second light-emitting diode LED2, the cathode of the second light-emitting diode LED2 is connected to one end of the third resistor R3, and the other end of the third resistor R3 is grounded; one end of the third capacitor C3 is connected to the output end of the main power switch SW4, and the other end of the third capacitor C3 is grounded; the fourth capacitor C4 is connected in parallel with the third capacitor C3; the fifth capacitor C5 is connected to the output end of the first voltage conversion chip U17, and the other end of the fifth capacitor C5 is grounded; the sixth capacitor C6 is connected in parallel with the fifth capacitor C5; the seventh capacitor C7 is connected in parallel with the sixth capacitor C6; one end of the eighth capacitor C8 is connected to the output end of the second voltage conversion chip U18, and the other end of the eighth capacitor C8 is grounded.

[0085] In this embodiment, the first battery BT1 and the second battery BT2 serve as the energy source for the power module 200, providing electrical energy for the entire circuit. The first diode D1 and the second diode D2 have unidirectional conductivity, which can prevent current backflow when the battery is reversed, protecting subsequent circuit components from damage. When the main power switch is pressed, the first battery BT1 and the second battery BT2 start working, making the entire development board active. When the main power switch SW4 is pressed, a first voltage (7.2V) is output. The first voltage conversion chip U17 is a low-dropout linear regulator that can convert the first voltage into a stable second voltage (5V) output, providing a stable 5V power supply for subsequent circuits. The third diode D3 can perform rectification and prevent voltage backflow to protect other components in the circuit. The second voltage conversion chip U18 is a voltage stabilization chip that can convert the second voltage into a stable third voltage (3.3V) output, powering chips or modules that require a voltage of 3.3V, such as the main control chip U1. The second light-emitting diode (LED2) serves as a power indicator light, illuminating when the circuit is properly powered, indicating whether the power module 200 is functioning properly. The third resistor (R3) cooperates with the second light-emitting diode (LED2) to limit current, preventing excessive current from flowing through the second light-emitting diode (LED2) and potentially damaging it. The third capacitor (C3), the fourth capacitor (C4), the fifth capacitor (C5), the sixth capacitor (C6), the seventh capacitor (C7), and the eighth capacitor (C8) act as filters, removing high- and low-frequency noise from the power supply, making the output voltage more stable and smooth, and reducing the impact of voltage fluctuations on the circuit.

[0086] In some embodiments, as Figure 1 、 Figure 2 and Figure 4As shown, the motor drive module 300 includes: a motor drive chip U2, a fourth diode D4, a fourth resistor R4, a fifth resistor R5, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11 and a third light-emitting diode LED3; the anode of the fourth diode D4 is connected to the motor drive power supply voltage, and the cathode of the fourth diode D4 is respectively connected to one end of the fourth resistor R4, the power pin of the motor drive chip U2, and the anode of the third light-emitting diode LED3; the other end of the fourth resistor R4 is connected to the sleep pin of the motor drive chip U2; the The cathode of the third light-emitting diode LED3 is connected to one end of the fifth resistor R5, and the other end of the fifth resistor R5 is grounded; one end of the ninth capacitor C9 is connected to the power pin of the motor driver chip U2, and the other end of the ninth capacitor C9 is grounded; one end of the tenth capacitor C10 is connected to the voltage regulator output pin of the motor driver chip U2, and the other end of the tenth capacitor C10 is grounded; one end of the eleventh capacitor C11 is connected to the power pin of the motor driver chip U2, and the other end of the eleventh capacitor C11 is connected to the drive voltage pin of the motor driver chip U2.

[0087] In this embodiment, the motor driver chip U2 can drive the motor to operate. The 16th pin (AIN1), the 15th pin (AIN2), the 9th pin (BIN1), and the 10th pin (BIN2) of the motor driver chip U2 receive control signals from the main control chip U1, thereby controlling the forward and reverse rotation and speed of motor A and motor B. Among them, the 1st pin (nSLEEP) of the motor driver chip U2 is used to control the sleep mode of the chip to reduce power consumption, and the 12th pin (VM) is connected to the power supply to provide the chip with an operating voltage. The fourth diode D4 has unidirectional conductivity, which can prevent current backflow when the power supply is reversed, protecting subsequent components such as the motor driver chip U2 from damage. The fourth resistor R4 plays the role of current limiting and voltage dividing, which can stabilize the voltage and current in the motor drive circuit. The third light-emitting diode LED3 serves as a power indicator light. When the motor drive module 300 has power input, it will light up to indicate the power supply status of the motor drive module. The fifth resistor R5, in conjunction with the third light-emitting diode LED3, acts as a current limiter, preventing excessive current from flowing through the third light-emitting diode LED3 and potentially damaging the diode. The ninth, tenth, and eleventh capacitors C9, C10, and C11 provide filtering, eliminating high- and low-frequency noise in the power supply. This provides a stable power input for the motor driver chip U2 and ensures stable operation. In one implementation, the motor driver chip can be a DRV8833PW.

[0088] In some embodiments, as Figure 1 、 Figure 2 and Figure 4 As shown, the signal switching module 400 includes a signal switching switch SW5, which is connected to the fourth diode D4. The signal switching switch SW5 is a manually controlled switch that can manually control the on and off of the circuit. When the signal switching switch is closed, the motor drive power supply can be connected to the subsequent circuit, thereby providing power for the motor drive. The signal switching switch SW5 can switch between the sensor power supply and the motor drive power supply, improving the reuse rate of the power port, allowing the development board to adapt to both the sensor power supply and the motor drive power supply, thereby improving development efficiency.

[0089] In some embodiments, as Figure 1 、 Figure 2 and Figure 5 As shown, the power supply and communication module includes: a USB to serial port chip U3, a sixth resistor R6, a seventh resistor R7, a twelfth capacitor C12, a first transistor Q1, a second transistor Q2, an eighth resistor R8, a ninth resistor R9, a fifth diode D5, a TYPE-C interface U4, a tenth resistor R10 and an eleventh resistor R11; one end of the sixth resistor R6 is connected to the receiving pin of the USB to serial port chip U3, and the other end of the sixth resistor R6 is connected to the main control chip U1; one end of the seventh resistor R7 is connected to the transmitting pin of the USB to serial port chip U3, and the other end of the seventh resistor R7 is connected to the main control chip U1; the collector of the first transistor Q1 is connected to the enable pin of the main control chip U1, the emitter of the first transistor Q1 is connected to the fourteenth pin of the USB to serial port chip U3, the base of the first transistor Q1 is connected to one end of the eighth resistor R8, and the eighth resistor R The other end of 8 is connected to the thirteenth pin of the USB-to-serial port chip U3; the collector of the second transistor Q2 is connected to the twenty-fifth pin of the main control chip U1, the emitter of the second transistor Q2 is connected to the thirteenth pin of the USB-to-serial port chip U3, the base of the second transistor Q2 is connected to one end of the ninth resistor, and the other end of the ninth resistor is connected to the fourteenth pin of the USB-to-serial port chip; the TYPE-C interface U4 is arranged on the printed circuit board 10 for connecting to an external TYPE-C interface device; the anode of the fifth diode D5 is connected to the power pin of the TYPE-C interface U4; one end of the tenth resistor R10 is connected to the first detection end of the TYPE-C interface U4, and the other end of the tenth resistor R10 is grounded; one end of the eleventh resistor R11 is connected to the second detection end of the TYPE-C interface U4, and the other end of the eleventh resistor R11 is grounded.

[0090] In this embodiment, the USB-to-serial port chip U3 can realize the communication conversion between the USB interface and the serial port, which facilitates the computer to transmit data and download programs with the development board through the USB interface. The sixth resistor R6 and the seventh resistor R7 play a current limiting role, respectively limiting the current on the receiving pin and the transmitting pin circuit, ensuring the USB-to-serial port chip and other circuit components connected to the USB-to-serial port chip. The twelfth capacitor C12 can filter the power supply, filter out high-frequency clutter, provide a stable power supply for the USB-to-serial port chip U3, and ensure stable operation of the chip. The first transistor Q1 and the second transistor Q2 act as switching elements, and the level signals of the 3rd pin (EN) and the 25th pin (IO0) of the main control chip U1 control the conduction and cutoff of the first transistor Q1 and the second transistor Q2, thereby realizing the on-off control and level conversion functions of the circuit. The eighth resistor and the ninth resistor R9 are bias resistors for the first transistor Q1 and the second transistor Q2, respectively, providing appropriate base currents for the first transistor Q1 and the second transistor Q2 to ensure that the transistors operate in the correct state. The TYPE-C interface U4 can be connected to an external TYPE-C interface device to realize power supply and data communication functions, and cooperate with the serial communication circuit components through various pins to realize the transmission of power and data signals. The fifth diode D5 has unidirectional conductivity, which can prevent current backflow when the power supply is connected in reverse, protecting subsequent circuit components from damage. The tenth resistor R10 and the eleventh resistor R11 play a role in voltage division and current limiting. Combined with the working characteristics of the TYPE-C interface, they stabilize the voltage and current in the circuit.

[0091] In some embodiments, as Figure 1 、 Figure 2 and Figure 6 As shown, the display screen module 500 includes: a first onboard switch U12, a second onboard switch U13, a twelfth resistor R12, a thirteenth resistor R13 and a display screen interface TFT; the first onboard switch U12 is respectively connected to the power module 200 and the main control chip U1; the second onboard switch U13 is respectively connected to the power module 200 and the main control chip U1; one end of the twelfth resistor R12 is respectively connected to the main control chip U1 and the fourth pin of the first onboard switch U12, and the other end of the twelfth resistor R12 is grounded; one end of the thirteenth resistor R13 is respectively connected to the main control chip U1 and the fourth pin of the second onboard switch U13, and the other end of the thirteenth resistor R13 is grounded; the display screen interface TFT is connected to the main control chip U1.

[0092] In this embodiment, the printed circuit board 10 is provided with onboard switches, namely the first onboard switch U12 and the second onboard switch U13. The first onboard switch U12 and the second onboard switch U13 are connected to the 6th pin (IO34) and the 7th pin (IO35) of the main control chip U1, respectively. The twelfth resistor R12 and the thirteenth resistor R13 are pull-down resistors, which pull the voltage levels of pins 6 and 7 of the main control chip U1 to a low level. When the onboard switches are not in operation, the pins are kept in a stable low-level state, preventing uncertain voltage level interference from the onboard switches and ensuring the stability of circuit operation. The display interface TFT is used to connect the TFT display screen to the main control chip signal. Signals are transmitted to the main control chip U1 through the pins, and interaction is carried out through the TFT display screen. No additional external interactive equipment is required, which avoids wiring and debugging, and reduces the complexity of user operation.

[0093] In some embodiments, as Figure 1 、 Figure 2 and Figure 6 As shown, the onboard expansion module 800 includes: a PS2 interface U15, a thirteenth capacitor C13 and a resistor RN1; the PS2 interface U15 is connected to the main control chip U1; one end of the thirteenth capacitor C13 is connected to the power pin of the PS2 interface U15, and the other end of the thirteenth capacitor C13 is grounded; the resistor RN1 is connected between the main control chip and the PS2 interface.

[0094] In this embodiment, the PS2 interface is used to connect a PS2 controller, and communicates with the main control chip through pins such as PS2_DAT (data), PS2_CMD (command), and PS2_CLK (clock), thereby transmitting controller data so that the development board can obtain the operation information of the controller. The thirteenth capacitor C13 plays a filtering role, eliminating high-frequency clutter in the PS2 interface power supply, providing a stable power input for the PS2 controller, and ensuring stable operation of the PS2 controller. The resistor RN1 plays the role of current limiting and impedance matching, and can process the signals transmitted between the PS2 interface and the main control chip U1, ensuring the accuracy and stability of data transmission, and ensuring that circuit components are not affected by excessive current. In some embodiments, the onboard expansion module 800 can also be a key module, an audio output module, etc.

[0095] In some embodiments, as Figure 1 、 Figure 2 and Figure 7 As shown, the expansion interface module 700 includes a sensor interface and an external actuator interface, the sensor interface is connected to the main control chip, and the external actuator interface is connected to the main control chip.

[0096] In this embodiment, the expansion interface module 700 includes several expansion interfaces, such as sensor interfaces and external actuator interfaces. The pins with IO numbers on the expansion interfaces are input and output pins, which can exchange data with external modules, receive data from external sensors, such as temperature and humidity data, and send control signals to external actuators, such as controlling motor rotation and steering gear swing. In one implementation, the expansion interface module 700 has 16 expansion interfaces (such as Figure 7 CN-CN16 in the figure) contains motor-related identifiers (such as MOTTOR_A, MOTOR_B) and is specifically used to connect motors and other actuators, and cooperate with motor drive circuits to achieve motor control, such as forward and reverse rotation and speed adjustment.

[0097] In some embodiments, the expansion interface of the expansion interface module 700 is a fool-proof interface. For example, a KF2510 connector can be used. The KF25110 connector is designed with matching clips and guide grooves on both sides, which only allow insertion after alignment in the correct direction to avoid forced reverse connection that may cause the pins to bend or be damaged.

[0098] In summary, the interactive Internet of Things development board provided by the present invention has the following beneficial effects:

[0099] The development board is equipped with 16 expansion interfaces on the outside, providing ample room for user expansion. These interfaces allow for the connection of a wide variety of external modules, such as sensors (temperature, humidity, light, etc.), actuators (motors, servos, etc.), and other functional modules. Furthermore, users can freely define the specific usage of these expansion interfaces based on their own development needs, breaking the limitations of traditional development board interface functions and greatly enhancing the development board's adaptability to different application scenarios, meeting the diverse needs of IoT development.

[0100] The internal power supply module can provide multiple voltage outputs such as 7.2V, 5V, and 3.3V. This multi-voltage output design can adapt to expansion modules with different operating voltage requirements. For example, the motor drive part usually requires a higher voltage (such as 7.2V) to provide sufficient power; the TFT interactive display and traditional sensor module can be powered by 5V; low-power modules such as the PS2 handle module can be powered by 3.3V. This effectively solves the compatibility issues caused by voltage mismatch between modules and development boards from different manufacturers, not only reducing the difficulty of development, but also reducing the additional costs caused by adaptation issues, creating good conditions for secondary development of the product, and further improving the scalability of the development board;

[0101] In actual IoT applications, it is often necessary to switch between motor signals and sensor signals to adapt to different working scenarios. The development board provided by the present invention can easily realize this switching function through the built-in signal conversion module. At the same time, it is also equipped with a signal switching indicator light, so that users can intuitively understand the status of the current signal and avoid erroneous operations caused by improper signal switching, which greatly improves the development efficiency and makes the development process more convenient and efficient; it is different from traditional development boards that mostly lack interactive modules, or require additional connection to external interactive devices, resulting in cumbersome wiring and debugging. The present invention integrates interactive modules such as TFT display, LED, and audio output. The TFT display can clearly display the interactive content between the development board and the user, such as data display, operation prompts, etc.; the LED can be used for status indication, with different flashing modes to indicate different working states; the audio output can provide sound prompts or play simple audio, enriching the interaction method. The design of this integrated interactive module provides users with a more intuitive and convenient interactive experience, reduces the difficulty of operation during use, and makes the development board easier to use and develop;

[0102] The development board's expansion interface utilizes the KF2510 connector. This design effectively prevents wiring errors caused by negligence or unfamiliarity. These errors can damage the development board or expansion modules, leading to financial losses and time delays. The connectors are designed with matching latches and guide grooves on both sides to ensure proper insertion, preventing forced reverse connection that could bend or damage pins. This ensures that users can only connect expansion modules correctly, improving the safety and stability of the development process and providing reliable hardware support.

[0103] It should be understood that the application of the present invention is not limited to the above examples. For those skilled in the art, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. An interactive Internet of Things development board, characterized in that: include: printed circuit boards; A main control module supporting WIFI and Bluetooth communications is provided on the printed circuit board; A power supply module for providing multiple power supply voltages, disposed on the printed circuit board and connected to the main control module; a motor driving module for driving the motor, disposed on the printed circuit board and connected to the main control module; A signal switching module for switching the motor power supply and the sensor power supply is provided on the printed circuit board and is connected to the main control module and the motor drive module respectively; A display screen module for displaying interactive content, disposed on the printed circuit board and connected to the main control module; A power supply and communication module for transmitting data signals, disposed on the printed circuit board and connected to the main control module; An expansion interface module for connecting to an external expansion module is provided on the printed circuit board and connected to the main control module.

2. The interactive Internet of Things development board according to claim 1, characterized in that Also includes: An onboard expansion module is provided on the printed circuit board and is connected to the main control module and the power supply module respectively.

3. The interactive Internet of Things development board according to claim 2, characterized in that: The main control module includes: a main control chip, a first resistor, a second resistor, a first switch, a first light emitting diode, a first capacitor, a second capacitor and a buzzer; One end of the first switch is connected to one end of the first resistor and the enable end of the main control chip respectively, and the other end of the first switch is grounded; The other end of the first resistor is connected to the chip power supply voltage; the power supply end of the main control chip is connected to the chip power supply voltage; The first capacitor is connected between the other end of the first resistor and the ground; The second capacitor is connected to both ends of the first switch; The anode of the first light-emitting diode is connected to the main control chip, the cathode of the first light-emitting diode is connected to one end of the second resistor, and the other end of the second resistor is grounded; The positive pole of the buzzer is connected to the main control chip, and the negative pole of the buzzer is grounded.

4. The interactive Internet of Things development board according to claim 3, characterized in that: The power module includes: a first battery, a second battery, a first diode, a second diode, a main power switch, a first voltage conversion chip, a second voltage conversion chip, a third diode, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a second light-emitting diode, and a third resistor; The first diode is connected between the first battery and the second battery, and the second diode is connected between the second battery and the input terminal of the main power switch; The output end of the main power switch is connected to the input end of the first voltage conversion chip; The output end of the first voltage conversion chip is connected to the anode of the third diode, and the cathode of the third diode is connected to the input end of the second voltage conversion chip; The output end of the second voltage conversion chip is connected to the anode of the second light-emitting diode, the cathode of the second light-emitting diode is connected to one end of the third resistor, and the other end of the third resistor is grounded; One end of the third capacitor is connected to the output end of the main power switch, and the other end of the third capacitor is grounded; The fourth capacitor is connected in parallel with the third capacitor; The fifth capacitor is connected to the output terminal of the first voltage conversion chip, and the other end of the fifth capacitor is grounded; The sixth capacitor is connected in parallel with the fifth capacitor; The seventh capacitor is connected in parallel with the sixth capacitor; One end of the eighth capacitor is connected to the output end of the second voltage conversion chip, and the other end of the eighth capacitor is grounded.

5. The interactive Internet of Things development board according to claim 3, characterized in that: The motor driving module includes: a motor driving chip, a fourth diode, a fourth resistor, a fifth resistor, a ninth capacitor, a tenth capacitor, an eleventh capacitor and a third light emitting diode; The anode of the fourth diode is connected to the motor drive power supply voltage, and the cathode of the fourth diode is connected to one end of the fourth resistor, the power pin of the motor drive chip, and the anode of the third light-emitting diode respectively; The other end of the fourth resistor is connected to the sleep pin of the motor driver chip; The cathode of the third light emitting diode is connected to one end of the fifth resistor, and the other end of the fifth resistor is grounded; One end of the ninth capacitor is connected to the power pin of the motor driver chip, and the other end of the ninth capacitor is grounded; One end of the tenth capacitor is connected to the voltage stabilization output pin of the motor driving chip, and the other end of the tenth capacitor is grounded; One end of the eleventh capacitor is connected to the power pin of the motor driving chip, and the other end of the eleventh capacitor is connected to the driving voltage pin of the motor driving chip.

6. The interactive Internet of Things development board according to claim 3, characterized in that: The power supply and communication module includes: a USB to serial port chip, a sixth resistor, a seventh resistor, a twelfth capacitor, a first transistor, a second transistor, an eighth resistor, a ninth resistor, a fifth diode, a TYPE-C interface, a tenth resistor, and an eleventh resistor; One end of the sixth resistor is connected to the receiving pin of the USB-to-serial port chip, and the other end of the sixth resistor is connected to the main control chip; One end of the seventh resistor is connected to the transmitting pin of the USB-to-serial port chip, and the other end of the seventh resistor is connected to the main control chip; The collector of the first transistor is connected to the enable pin of the main control chip, the emitter of the first transistor is connected to the fourteenth pin of the USB-to-serial port chip, the base of the first transistor is connected to one end of the eighth resistor, and the other end of the eighth resistor is connected to the thirteenth pin of the USB-to-serial port chip; The collector of the second transistor is connected to the 25th pin of the main control chip, the emitter of the second transistor is connected to the 13th pin of the USB-to-serial port chip, the base of the second transistor is connected to one end of the ninth resistor, and the other end of the ninth resistor is connected to the 14th pin of the USB-to-serial port chip; The TYPE-C interface is provided on the printed circuit board and is used to connect to an external TYPE-C interface device; The anode of the fifth diode is connected to the power pin of the TYPE-C interface; One end of the tenth resistor is connected to the first detection end of the TYPE-C interface, and the other end of the tenth resistor is grounded; One end of the eleventh resistor is connected to the second detection end of the TYPE-C interface, and the other end of the eleventh resistor is grounded.

7. The interactive Internet of Things development board according to claim 3, characterized in that: The display screen module includes: a first onboard switch, a second onboard switch, a twelfth resistor, a thirteenth resistor and a display screen interface; The first onboard switch is connected to the power module and the main control chip respectively; The second onboard switch is connected to the power module and the main control chip respectively; One end of the twelfth resistor is connected to the main control chip and the fourth pin of the first onboard switch respectively, and the other end of the twelfth resistor is grounded; One end of the thirteenth resistor is connected to the main control chip and the fourth pin of the second onboard switch respectively, and the other end of the thirteenth resistor is grounded; The display screen interface is connected to the main control chip.

8. The interactive Internet of Things development board according to claim 3, characterized in that: The onboard expansion module includes: PS2 interface, thirteenth capacitor and resistor; The PS2 interface is connected to the main control chip; One end of the thirteenth capacitor is connected to the power pin of the PS2 interface, and the other end of the thirteenth capacitor is grounded; The resistor is connected between the main control chip and the PS2 interface.

9. The interactive Internet of Things development board according to claim 3, characterized in that: The expansion interface module includes a sensor interface and an external actuator interface, the sensor interface is connected to the main control chip, and the external actuator interface is connected to the main control chip.

10. The interactive Internet of Things development board according to claim 9, characterized in that: The expansion interface module is a fool-proof interface.

Images