Multifunctional internet of things development board

Abstract

The utility model provides a kind of multifunctional internet of things development board, including the core C260 interface module for the signal interaction of integration network, power, control and extension function;Including 3 eSIM interfaces, 1 USIM interface, SIM_SWITCH module, network module of Ethernet module and net mouth;Including the extension interface module of SDIO-WIFI interface, SPI screen interface, battery charging interface, function board switching interface, USB extension interface and RK3506 function extension interface, including the control module of function button, DBG serial port, pilot lamp and RTC dormancy wake-up interface, including the power module of 12V conversion 5V module, 5V conversion 3.8V module, 3.8V conversion 3.3V module and 3.3V conversion 1.8V module in turn electrically connected.The multifunctional internet of things development board of the application provides the power module of a variety of different commonly used voltage conversion specifications to different interfaces power supply, improves the adaptability of internet of things development board, can better satisfy the demand of different development scene.

Description

Technical Field

[0001] This utility model relates to the field of electronic circuit technology, and in particular to a multifunctional Internet of Things development board. Background Technology

[0002] With the rapid popularization of IoT technology, IoT devices such as gateways, smart home appliances, and in-vehicle terminals have become core nodes connecting the physical and digital worlds. These devices need to meet key requirements such as stable communication, high energy efficiency, flexible expansion, and low-power standby to adapt to diverse scenarios such as industry, home, and transportation. To better meet the needs of personalized customization, IoT development boards utilize a rich set of interfaces. However, most existing IoT development boards adopt a single voltage conversion architecture. When encountering modules from different manufacturers with different voltage specifications, additional circuitry is required for secondary voltage reduction, leading to development inconvenience.

[0003] Therefore, existing technologies still need to be improved and developed. Utility Model Content

[0004] This utility model provides a multifunctional Internet of Things (IoT) development board, which aims to solve the technical problems mentioned in the background art of existing IoT development boards.

[0005] The technical solution of this utility model is as follows: This utility model provides a multifunctional Internet of Things (IoT) development board, characterized in that it includes: The core C260 interface module is used to integrate signal interaction for network, power, control, and expansion functions; The network module includes three eSIM interfaces, one USIM interface, a SIM_SWITCH module, an Ethernet module, and a network port. The three eSIM interfaces and one USIM interface are all connected to the core C260 interface module through the SIM_SWITCH module, and the network port is connected to the core C260 interface module through the Ethernet module. The expansion interface module includes an SDIO-WIFI interface, an SPI screen interface, a battery charging interface, a function board adapter interface, a USB expansion interface, and an RK3506 function expansion interface, all connected to the core C260 interface module. The control module includes function buttons, a DBG serial port, indicator lights, and an RTC sleep / wake-up interface connected to the core C260 interface module. The power supply module includes a 12V to 5V module, a 5V to 3.8V module, a 3.8V to 3.3V module, and a 3.3V to 1.8V module connected in sequence. The 12V to 5V module is connected to a DC interface to obtain input power. The power supply module provides power with an adapted voltage for the core C260 interface module and the expansion interface module.

[0006] In one optional embodiment of this utility model, the power module further includes a 5V power switch and a Type-C interface. The Type-C interface is connected to the 12V to 5V module through the 5V power switch. The 12V to 5V module and the 5V to 3.8V module respectively form a first branch and a second branch for powering the core C260 interface module. The 3.8V to 3.3V module forms a third branch for powering the SDIO-WIFI interface, SPI screen interface, battery charging interface, function board adapter interface, USB expansion interface, and RK3506 function expansion interface. The 3.3V to 1.8V module forms a fourth branch for powering the SDIO-WIFI interface, SPI screen interface, battery charging interface, function board adapter interface, USB expansion interface, and RK3506 function expansion interface.

[0007] In one optional embodiment of this utility model, the SDIO-WIFI interface is a 2×20 pin interface, used for connecting WIFI modules that support the SDIO protocol; The SPI screen interface is a 2×12 pin interface, used to connect to display screens that support the SPI protocol; The battery charging interface is a 2×8 pin interface, used to support equal charging of 3.8V lithium batteries; The function board adapter interface is a 2×15 pin interface, which is used to support the functional expansion of custom sensor boards, relay boards and other custom components. The USB expansion interface is a 2×20 pin interface, used to support USB 2.0 / 3.0 peripheral expansion; The RK3506 function expansion interface is an interface adapted to the Rockchip RK3506 processor, supporting 1.8V / 3.3V IO levels, and is used to expand edge computing capabilities.

[0008] In one optional embodiment of this utility model, the RTC sleep / wake-up interface is a 2×5 pin interface, used to connect RTC chips that support I2C or SPI protocols.

[0009] In one optional embodiment of this utility model, the Ethernet PHY chip of the Ethernet module is an RTL8211FI-CG Ethernet PHY chip, and the network port is an RJ45 network port.

[0010] In one optional embodiment of this utility model, the SIM_SWITCH module supports 4-way SIM card switching to achieve dynamic switching between the 3 eSIM interfaces and the 1 USIM interface.

[0011] In one optional embodiment of this utility model, the indicator light includes at least three LEDs, which are a power indicator, a network status indicator, and a running status indicator, respectively. In one optional embodiment of this utility model, the DBG serial port is a UART serial port, used to output system logs, error messages and receive debugging commands during development and debugging.

[0012] In one optional embodiment of this utility model, the function keys include a reset key for restarting the development board system and a mode switching key for switching the development board's working mode. The beneficial effects are as follows: This utility model provides a multifunctional IoT development board, including a core C260 interface module for signal interaction integrating network, power, control, and extended functions; a network module including three eSIM interfaces, one USIM interface, a SIM_SWITCH module, an Ethernet module, and a network port; an expansion interface module including an SDIO-WIFI interface, an SPI screen interface, a battery charging interface, a function board adapter interface, a USB expansion interface, and an RK3506 function expansion interface; a control module including function buttons, a DBG serial port, indicator lights, and an RTC sleep / wake-up interface; and a power supply module including a 12V to 5V module, a 5V to 3.8V module, a 3.8V to 3.3V module, and a 3.3V to 1.8V module connected in sequence. This multifunctional IoT development board provides power modules with various commonly used voltage conversion specifications to power different interfaces, improving the adaptability of the IoT development board and better meeting the needs of different development scenarios. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a multifunctional Internet of Things development board according to the present invention.

[0014] Figure 2 and Figure 3 This is a circuit diagram of a core C260 interface module of this utility model.

[0015] Figures 4-12 This is a circuit diagram of a network module according to the present invention.

[0016] Figures 13-18 This is a circuit diagram of an expansion interface module according to the present invention; Figures 19-22This is a circuit diagram of a control module according to the present invention; Figures 23-27 This is a circuit diagram of a control module according to the present invention. Detailed Implementation

[0017] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] It should be noted in advance that in the following description of this utility model, if there are any terms, the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] Throughout this specification, reference to "an embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention. Therefore, the phrase "in one embodiment" or "in some embodiments" appears in various places throughout the specification, and not all references refer to the same embodiment. Furthermore, in one or more embodiments, particular features, structures, or characteristics may be combined in any suitable manner.

[0021] See Figure 1 This utility model provides a multifunctional Internet of Things development board, characterized in that it includes: Core C260 interface module (circuit diagram available) Figure 2 and Figure 3 The core C260 interface module serves as the system's functional hub, integrating signal interaction between network, power, control, and expansion functions. Through its expansion interface, it supports diverse hardware expansions, meeting the multi-connectivity, multi-functionality, and customizable needs of IoT terminals.

[0022] Network module (circuit diagram available) Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 12 The system includes three eSIM interfaces, one USIM interface, a SIM_SWITCH module, an Ethernet module, and a network port. The three eSIM interfaces and one USIM interface are all connected to the core C260 interface module via the SIM_SWITCH module. The network port is connected to the core C260 interface module via the Ethernet module. In an optional embodiment of this invention, the SIM_SWITCH module supports four-way SIM card switching to achieve dynamic switching between the three eSIM interfaces and the one USIM interface. The Ethernet module uses an RTL8211FI-CG Ethernet PHY chip, and the network port is an RJ45 port.

[0023] Specifically, the SIM card circuit of this invention supports three eSIMs (embedded SIMs, no physical card required) + one USIM (traditional SIM card), connected to the core C260 interface module via SIM_SWITCH (SIM card switching chip), meeting the needs of multi-carrier and multi-network switching (such as redundant networks for IoT devices). Ethernet: Connected to the network port via RTL8211FI-CG (Gigabit Ethernet PHY chip), supporting gigabit wired networks (commonly used in industrial environments).

[0024] Expansion interface module (circuit diagram available) Figure 13 , Figure 14 , Figure 15 , Figure 16 , Figure 17 and Figure 18The system includes an SDIO-WIFI interface, an SPI screen interface, a battery charging interface, a function board adapter interface, a USB expansion interface, and an RK3506 function expansion interface, all connected to the core C260 interface module. In one optional embodiment of this invention, the SDIO-WIFI interface is a 2×20 pin interface for connecting WIFI modules supporting the SDIO protocol; the SPI screen interface is a 2×12 pin interface for connecting display screens supporting the SPI protocol; the battery charging interface is a 2×8 pin interface for supporting balanced charging of 3.8V lithium batteries; the function board adapter interface is a 2×15 pin interface for supporting functional expansion such as custom sensor boards and relay boards; the USB expansion interface is a 2×20 pin interface for supporting USB 2.0 / 3.0 peripheral expansion; and the RK3506 function expansion interface is an interface adapted to the Rockchip RK3506 processor, supporting 1.8V / 3.3V IO levels, for expanding edge computing capabilities.

[0025] Specifically, this utility model includes an SDIO-WIFI interface (2*20 pins), where SDIO is a commonly used interface for WIFI modules, supporting 2.4G / 5G WIFI; an SPI screen interface (2*12 pins), where SPI is a serial interface for small-sized screens (such as OLED and TFT), suitable for low-resolution displays; a battery charging interface (2*8 pins), supporting lithium battery charging, allowing for portable system use, such as handheld terminals; a function board adapter interface (2×15 pins), used to connect custom function boards, such as sensor boards and relay boards; a USB expansion interface (2×20 pins), for expanding USB devices, such as USB flash drives and cameras; and an RK3506 function expansion interface (Rockchip RK3506 is an ARM Cortex-A55 processor that supports Linux systems), used to expand computing capabilities, such as running complex applications and edge computing.

[0026] This utility model, through its rich array of expansion interfaces, can meet the following diverse scenario requirements: Wireless expansion: SDIO-WIFI (supports WIFI connection) + multiple SIM cards (supports 4G / 5G cellular networks), covering all "wired + wireless" network scenarios, such as industrial gateways and IoT terminals; Display expansion: SPI screen, supporting small-size displays, such as device status screens; Function expansion: Function board adapter interface, supporting connection to sensors, actuators, etc., such as temperature and humidity sensors and relay control boards; Computing expansion: RK3506 interface, supporting the expansion of more powerful processors, such as scenarios requiring the running of graphical interfaces or complex algorithms; USB expansion: supporting the connection of more USB devices, such as data acquisition devices and printers.

[0027] Control module (circuit diagram available) Figure 19, Figure 20 , Figure 21 and Figure 22 The development board includes function buttons, a DBG serial port, indicator lights, and an RTC sleep / wake-up interface connected to the core C260 interface module. In an optional embodiment of this invention, the function buttons include a reset button for restarting the development board system and a mode switch button for switching the development board's operating mode. The indicator lights include at least three LEDs, which are a power indicator, a network status indicator, and a running status indicator. The DBG serial port is a UART serial port, used for outputting system logs, error messages, and receiving debugging commands during development and debugging. The RTC sleep / wake-up interface is a 2×5 pin interface used for connecting RTC chips that support I2C or SPI protocols.

[0028] Specifically, the function buttons of the control interface module of this utility model are mainly used for user input (such as reset / mode switching), the DBG serial port is mainly used for debugging interface and outputting logs during development, the indicator lights are mainly used for status display, such as power / network / run, the RTC sleep wake-up is connected to the real-time clock (RTC) chip, supports low-power sleep, most circuits can be turned off when the system is in standby, only the RTC is held up for time, and timed wake-up, such as timed data collection by IoT devices.

[0029] Power module (circuit diagram available) Figure 23 , Figure 24 , Figure 25 , Figure 26 and Figure 27 The system includes a 12V to 5V module, a 5V to 3.8V module, a 3.8V to 3.3V module, and a 3.3V to 1.8V module connected in sequence. The 12V to 5V module is connected to a DC interface to obtain input power. The power module provides a power supply with an appropriate voltage for the core C260 interface module and the expansion interface module. In one optional embodiment of this utility model, the power module further includes a 5V power switch and a Type-C interface. The Type-C interface is connected to the 12V to 5V module through the 5V power switch. The 12V to 5V module and the 5V to 3.8V module respectively form a first branch and a second branch for powering the core C260 interface module. The 3.8V to 3.3V module forms a third branch for powering the SDIO-WIFI interface, SPI screen interface, battery charging interface, function board adapter interface, USB expansion interface, and RK3506 function expansion interface. The 3.3V to 1.8V module forms a fourth branch for powering the SDIO-WIFI interface, SPI screen interface, battery charging interface, function board adapter interface, USB expansion interface, and RK3506 function expansion interface.

[0030] Specifically, the power architecture of this IoT development board adopts a multi-voltage hierarchical power supply. Starting from the DC interface (input 12V), the system power supply provides four voltage levels: 5V, 3.8V, 3.3V, and 1.8V through multi-stage step-down conversion, covering the power consumption requirements of different modules. Specifically, 12V→5V: A 12V to 5V converter is used to convert the voltage, and a 5V power switch powers the Type-C interface (5V is a common peripheral voltage); 5V→3.8V: Powers the C260 core interface module; 3.8V→3.3V and 3.3V→1.8V: Power the SDIO-WIFI interface, SPI screen interface, battery charging interface, and function board interface (3.3V and 1.8V are the most commonly used IO voltages for IoT devices on the market), especially powering the RK3506 function expansion interface (the RK3506's IO level is typically 1.8V / 3.3V, which can accommodate low voltage requirements). The power architecture of this utility model is characterized by its hierarchical power supply to optimize power consumption, with different modules using corresponding voltages to avoid energy waste.

[0031] In summary, this utility model's multi-functional IoT development board has the following advantages: Multi-network support: 3 eSIMs + 1 USIM (cellular network), WIFI (wireless), and Gigabit Ethernet (wired), meeting the redundant network requirements of IoT devices; Low-power design: RTC sleep / wake-up function + tiered power supply, suitable for battery-powered portable devices or low-power sensor nodes; High scalability: Rich expansion interfaces (SDIO-WIFI, SPI screen, RK3506 expansion, function board adapter), supporting customized development; Industrial-grade stability: Adopting RTL8211F (industrial-grade Ethernet PHY), multi-SIM card switching (redundant network), and other designs, suitable for use in industrial environments.

[0032] In summary, this utility model provides a multifunctional IoT development board, including a core C260 interface module for signal interaction integrating network, power, control, and expansion functions; a network module including three eSIM interfaces, one USIM interface, a SIM_SWITCH module, an Ethernet module, and a network port; an expansion interface module including an SDIO-WIFI interface, an SPI screen interface, a battery charging interface, a function board adapter interface, a USB expansion interface, and an RK3506 function expansion interface; a control module including function buttons, a DBG serial port, indicator lights, and an RTC sleep / wake-up interface; and a power supply module including a 12V to 5V module, a 5V to 3.8V module, a 3.8V to 3.3V module, and a 3.3V to 1.8V module connected in sequence. This multifunctional IoT development board provides power modules with various commonly used voltage conversion specifications to power different interfaces, improving the adaptability of the IoT development board and better meeting the needs of different development scenarios.

[0033] Although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A multifunctional Internet of Things (IoT) development board, characterized in that, include: The core C260 interface module is used to integrate signal interaction for network, power, control, and expansion functions; The network module includes three eSIM interfaces, one USIM interface, a SIM_SWITCH module, an Ethernet module, and a network port. The three eSIM interfaces and one USIM interface are all connected to the core C260 interface module through the SIM_SWITCH module, and the network port is connected to the core C260 interface module through the Ethernet module. The expansion interface module includes an SDIO-WIFI interface, an SPI screen interface, a battery charging interface, a function board adapter interface, a USB expansion interface, and an RK3506 function expansion interface, all connected to the core C260 interface module. The control module includes function buttons, a DBG serial port, indicator lights, and an RTC sleep / wake-up interface connected to the core C260 interface module. The power supply module includes a 12V to 5V module, a 5V to 3.8V module, a 3.8V to 3.3V module, and a 3.3V to 1.8V module connected in sequence. The 12V to 5V module is connected to a DC interface to obtain input power. The power supply module provides a power supply with an adapted voltage for the core C260 interface module and the expansion interface module.

2. The multifunctional IoT development board according to claim 1, characterized in that, The power module also includes a 5V power switch and a Type-C interface. The Type-C interface is connected to the 12V to 5V module through the 5V power switch. The 12V to 5V module and the 5V to 3.8V module respectively form a first branch and a second branch for powering the core C260 interface module. The 3.8V to 3.3V module forms a third branch for powering the SDIO-WIFI interface, SPI screen interface, battery charging interface, function board adapter interface, USB expansion interface, and RK3506 function expansion interface. The 3.3V to 1.8V module forms a fourth branch for powering the SDIO-WIFI interface, SPI screen interface, battery charging interface, function board adapter interface, USB expansion interface, and RK3506 function expansion interface.

3. The multifunctional IoT development board according to claim 1, characterized in that, The SDIO-WIFI interface is a 2×20 pin interface used for connecting WIFI modules that support the SDIO protocol; The SPI screen interface is a 2×12 pin interface, used to connect to display screens that support the SPI protocol; The battery charging interface is a 2×8 pin interface, used to support equal charging of 3.8V lithium batteries; The function board adapter interface is a 2×15 pin interface, which is used to support the functional expansion of custom sensor boards and relay boards. The USB expansion interface is a 2×20 pin interface, used to support USB 2.0 / 3.0 peripheral expansion; The RK3506 function expansion interface is an interface adapted to the Rockchip RK3506 processor, supporting 1.8V / 3.3V IO levels, and is used to expand edge computing capabilities.

4. The multifunctional IoT development board according to claim 1, characterized in that, The RTC sleep / wake-up interface is a 2×5 pin interface used for connecting RTC chips that support I2C or SPI protocols.

5. The multifunctional IoT development board according to claim 1, characterized in that, The Ethernet module uses an RTL8211FI-CG Ethernet PHY chip and an RJ45 network port.

6. The multifunctional IoT development board according to claim 1, characterized in that, The SIM_SWITCH module supports 4-way SIM card switching to enable dynamic switching between the 3 eSIM interfaces and the 1 USIM interface.

7. The multifunctional IoT development board according to claim 1, characterized in that, The indicator light includes at least three LEDs, which are a power indicator, a network status indicator, and a running status indicator.

8. The multifunctional IoT development board according to claim 1, characterized in that, The DBG serial port is a UART serial port, used to output system logs, error messages, and receive debugging commands during development and debugging.

9. The multifunctional IoT development board according to claim 1, characterized in that, The function keys include a reset key for restarting the development board system and a mode switch key for switching the development board's working mode.

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