Development board for environment sensing alarm and Internet of Things gateway

Abstract

The utility model relates to a development board used for environment sensing alarm and an Internet of Things gateway. Comprising an MCU module, a wireless communication module, an input capture module, an LED color control module, a sensor module, an audio file decoding module, an infrared module, a wireless radio frequency identification module, an analog switch module and the like. Data transmission can be carried out through a wireless network; a program can be imported into the single-chip microcomputer and can be downloaded to the single-chip microcomputer, so that programming of the single-chip microcomputer is realized; the colors of the lamp beads can be adjusted, and color setting of the lamp beads is achieved; half-duplex data transmission is carried out between the level conversion chip and the bus. An Ethernet controller is arranged, so that data caching, receiving and sending are realized; an audio file can be decoded; an acceleration sensor, an illumination sensor, a temperature and humidity sensor and a flame sensor can be accessed; reflected light can be detected, and fire alarm can be carried out.

Description

Technical Field

[0001] The utility model belongs to the field of industrial automation control and the Internet of Things, and in particular relates to a development board for environmental sensor alarms and Internet of Things gateways. Background Art

[0002] Nowadays, development boards are mostly designed for beginners to learn and use, with a low starting point. The peripheral devices used by the chips are even products launched in the last century. With the rapid development of current electronic technology, tens of thousands of new electronic components are launched every year. Obviously, traditional development boards can no longer meet the current multi-functional development needs. There is a lack of a development board for environmental sensor alarms and Internet of Things gateways that is suitable for industrial-grade product prototype development and keeps up with the current technological trends. Based on this, a development board for environmental sensor alarms and Internet of Things gateways is designed. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a development board for environmental sensor alarms and Internet of Things gateways.

[0004] This development board for environmental sensor alarm and IoT gateway includes: MCU module, program download interface, reset button, wireless communication module (BC20 module), input capture module, wake-up module (Wake up button), LED color control module (WS2812B), USB interface conversion module (USB female socket), Type-C interface conversion module (Type-C interface), sensor module, motor speed measurement interface, Ethernet control module (W5500), audio file decoding module (VS1003), infrared module, Zigbee sensor node module (CC2530), wireless radio frequency identification module (RFID), level conversion module (CP2012 chip), display module (LCD), analog switch module (CH445P), storage module, and control LAN bus;

[0005] The MCU module is connected to the Ethernet control module (W5500), audio file decoding module (VS1003), wireless radio frequency identification module (RFID), level conversion module (CP2012 chip), sensor module, display module (LCD), analog switch module (CH445P), and storage module respectively;

[0006] A Type-C interface conversion module (Type-C interface), whose input end is connected to the output end of the USB interface conversion module (USB female socket); the Type-C interface conversion module is used to convert the output level of the USB interface conversion module; the Type-C interface conversion module and the USB interface conversion module are both connected to the MCU module; the USB interface conversion module is used to realize USB communication;

[0007] The wireless communication module is wirelessly connected to the sensor module, and the wireless communication module is connected to the MCU module; the wireless communication module is used to wirelessly connect to the host computer, wirelessly download the program from the host computer to the development board, and is used for communication with the sensor module;

[0008] The program download interface is set on the MCU module, and the program download interface is connected to the host computer;

[0009] LED color control module (WS2812B), electrically connected to the MCU module, is used to adjust the color of the connected LED lamp according to the control instructions sent by the MCU module, and supports GPIO direct control and SPI+DMA composite control;

[0010] Zigbee sensor node module (CC2530) connects the wireless communication module (BC20 module) and MCU module to build a wireless sensor network and transmit data;

[0011] The control LAN bus connects the MCU module, Ethernet control module (W5500), infrared module and wireless radio frequency identification module (RFID) for serial protocol communication of each module.

[0012] As a preference:

[0013] The development board also has a power module and a power switch module; the rated voltage of the power switch module is 12V and the rated current is 1A, which is used to support wide voltage input;

[0014] The USB interface conversion module is a USB female socket, which is used to realize USB communication between the MCU module and the host computer; the Type-C interface conversion module is a Type-C interface, which is used as a USB output interface and converts USB and TTL levels through a level conversion module (CP2012 chip);

[0015] Two analog switch modules (CH445P) are provided, and the two analog switch modules (CH445P) are electrically connected to the MCU module, one of the analog switch modules (CH445P) is also electrically connected to the Ethernet control module (W5500) and the LED color control module (WS2812B); the other analog switch module (CH445P) is also electrically connected to the audio file decoding module (VS1003) and the LED color control module (WS2812B); the power input ends of the two analog switch modules (CH445P) are connected to a 3.3V DC power supply, and the two analog switch modules (CH445P) are also grounded; the analog switch uses a four-pole double-throw 3.3V low-resistance chip CH445P; the LED lights connected to the LED color control module are all driven by a constant current source TP4115;

[0016] A fixed voltage regulator LD1086D2M33 is connected between the 3.3V DC power supply and the analog switch module;

[0017] The program download interface of the MCU module adopts a four-wire SWD interface (easy to connect). In order to improve its speed, the four-wire SWD interface is connected to the J-Tag adapter board through a 4Pin cable, the J-Tag adapter board is connected to the J-Link emulator, the J-Link emulator is connected to the Micro-USB cable, and the Micro-USB cable is connected to the computer through the USB interface.

[0018] Preferably, the reset button is used to reset the program of the MCU module on the development board.

[0019] Preferably, the development board also provides multiple pins (BOOT0 and BOOT1) to select the program download location.

[0020] Preferably, the input capture module is connected to the MCU module for capturing the input and transmitting it to the MCU module.

[0021] Preferably, the input capture module includes a five-way button and a capacitive touch button, and both the five-way button and the capacitive touch button are used for input capture and transmitting the captured input to the MCU module.

[0022] As a preference:

[0023] The wake-up module is connected to the MCU module and the power module, and is used to wake up the MCU module from the low power mode; the wake-up module is the wake up button set on the development board;

[0024] The MCU module and the display module (LCD) are connected through multiple female connectors (CN1, CN2 and CN3), which are connected to a 5V DC power supply and powered by it; a voltage regulator module (MP2560DN) is connected between the 5V DC power supply and the female connector to stabilize the 5V power supply.

[0025] As a preference:

[0026] The infrared module includes a transmitting tube and a receiving tube, and the hardware bottom layer of the infrared module is connected to the serial port;

[0027] Program download interface, used to download programs from the host computer to the development board via wired connection;

[0028] The sensor module includes an acceleration sensor (24C02, MPU6050), a light sensor (BH1750), a temperature and humidity sensor (SHT20), a fire sensor and a reflective sensor; the fire sensor is used to detect the wavelength of light radiated by the fire to realize an alarm; the reflective sensor is used to detect reflected light;

[0029] The motor speed measurement interface is connected to the DC motor through an H-bridge driving circuit to drive the DC motor;

[0030] The RFID interface of the MCU module is connected to the wireless radio frequency identification module (RFID), and the wireless radio frequency identification module (RFID) uses the S50 chip;

[0031] The wireless communication module is the BC20 module.

[0032] As a preferred embodiment: it also includes an RS-485 communication circuit and a two-way relay; the RS-485 communication circuit is connected to the serial port on the MCU module through a level conversion chip for transmitting half-duplex data; the two-way relay is in a normally closed state.

[0033] The beneficial effects of the utility model are: it can realize level conversion; it can transmit data through wireless network; it can import programs into the single-chip microcomputer, and it can download programs to the single-chip microcomputer to realize programming of the single-chip microcomputer; it can adjust the color of the lamp beads to realize the color setting of the lamp beads; half-duplex data transmission between the level conversion chip and the bus; it is equipped with an Ethernet controller to realize data caching, reception and transmission; it can decode audio files; it can access acceleration sensors, light sensors, temperature and humidity sensors and fire sensors; it can detect reflected light and issue a fire alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is the circuit schematic of the MCU module on the development board used for environmental sensor alarm and IoT gateway;

[0035] Figure 2 The circuit schematic diagram includes the female header, the voltage regulator module connected between the 5V DC power supply and the female header, the fixed voltage regulator module connected between the 3.3V DC power supply and the analog switch module, and the program download interface;

[0036] Figure 3 It is the circuit schematic diagram of the Ethernet control module;

[0037] Figure 4 This is the circuit schematic diagram of the audio file decoding module;

[0038] Figure 5 It is the circuit schematic diagram of the wireless radio frequency identification module;

[0039] Figure 6 From top to bottom, they are the circuit schematics of the unidirectional TVS diode array (USBLC6-2P6), the USB2.0 female connector, and the circuit schematics of the TJA1050 high-speed CAN transceiver.

[0040] Figure 7 This is the circuit schematic diagram of the sensor module;

[0041] Figure 8 It includes the circuit schematics of the beam switch, fire sensor, J-Tag interface, stepper motor, buzzer, relay, LED color control module and button module;

[0042] Fig. 9 It is the circuit schematic diagram of the static storage controller FSMC interface;

[0043] Fig.10 It is the circuit schematic diagram of wireless communication module, Zigbee sensor node module and RS-485 communication circuit. DETAILED DESCRIPTION

[0044] The utility model is further described below in conjunction with the embodiments. The description of the following embodiments is only used to help understand the utility model. It should be pointed out that for ordinary people in this technical field, the utility model can also be modified in some ways without departing from the principle of the utility model, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

[0045] As an example, Figures 1 to 10 As shown, a development board for environmental sensor alarm and Internet of Things gateway includes: MCU module, program download interface, reset button, wireless communication module (BC20 module), input capture module, wake-up module (Wake up button), LED color control module (WS2812B), USB interface conversion module (USB female socket), Type-C interface conversion module (Type-C interface), sensor module, motor speed measurement interface, Ethernet control module (W5500), audio file decoding module (VS1003), infrared module, Zigbee sensor node module (CC2530), wireless radio frequency identification module (RFID), level conversion module (CP2012 chip), display module (LCD), two analog switch modules (CH445P), storage module, control LAN bus, power module and power switch module; the rated voltage of the power switch module is 12V and the rated current is 1A, which is used to support wide voltage input; the motor speed measurement interface is connected to the DC motor through the H-bridge drive circuit for driving the DC motor; it also includes RS-485 communication circuit and dual-channel relay; the RS-485 communication circuit is connected to the serial port on the MCU module through the level conversion chip for transmitting half-duplex data; the dual-channel relay is in a normally closed state;

[0046] The MCU module is respectively connected to the Ethernet control module (W5500), the audio file decoding module (VS1003), the wireless radio frequency identification module (RFID), the level conversion module (CP2012 chip), the sensor module, the display module (LCD), the analog switch module (CH445P), and the storage module; the MCU module and the display module (LCD) are connected through multiple female connectors (CN1, CN2, and CN3), and the female connectors are connected to a 5V DC power supply and powered by it; a voltage regulator module (MP2560DN) is connected between the 5V DC power supply and the female connectors to stabilize the 5V power supply;

[0047] A Type-C interface conversion module (Type-C interface), whose input end is connected to the output end of the USB interface conversion module (USB female socket); the Type-C interface conversion module is used to convert the output level of the USB interface conversion module; the Type-C interface conversion module and the USB interface conversion module are both connected to the MCU module; the USB interface conversion module is used to realize USB communication; the USB interface conversion module is a USB female socket, which is used to realize USB communication between the MCU module and the host computer; the Type-C interface conversion module is a Type-C interface, which is used as a USB output interface, and converts USB and TTL levels through a level conversion module (CP2012 chip);

[0048] The wireless communication module is wirelessly connected to the sensor module, and the wireless communication module is connected to the MCU module; the wireless communication module is used to wirelessly connect to the host computer, wirelessly download the program from the host computer to the development board, and is used for communication of the sensor module; the sensor module includes an acceleration sensor (24C02, MPU6050), a light sensor (BH1750), a temperature and humidity sensor (SHT20), a fire sensor and a reflective sensor; the fire sensor is used to detect the band of light radiated by the fire to realize alarm; the reflective sensor is used to detect reflected light;

[0049] The program download interface is set on the MCU module. The program download interface is connected to the host computer and is used to download the program from the host computer to the development board via wire. The program download interface uses a four-wire SWD interface (easy to connect). In order to improve its speed, the four-wire SWD interface is connected to the J-Tag adapter board through a 4Pin cable, the J-Tag adapter board is connected to the J-Link emulator, the J-Link emulator is connected to the Micro-USB cable, and the Micro-USB cable is connected to the computer through the USB interface. The development board also leads to multiple pins (BOOT0 and BOOT1) to select the program download location;

[0050] LED color control module (WS2812B), electrically connected to the MCU module, is used to adjust the color of the connected LED lamp according to the control instructions sent by the MCU module, and supports GPIO direct control and SPI+DMA composite control;

[0051] Zigbee sensor node module (CC2530) connects the wireless communication module (BC20 module) and MCU module to build a wireless sensor network and transmit data;

[0052] The control LAN bus connects the MCU module, Ethernet control module (W5500), infrared module and wireless radio frequency identification module (RFID) for serial protocol communication of each module; the infrared module includes a transmitting tube and a receiving tube, and the hardware bottom layer of the infrared module is connected to the serial port; the RFID interface of the MCU module is connected to the wireless radio frequency identification module (RFID), and the wireless radio frequency identification module (RFID) uses the S50 chip;

[0053] The two analog switch modules (CH445P) are electrically connected to the MCU module, one of the analog switch modules (CH445P) is also electrically connected to the Ethernet control module (W5500) and the LED color control module (WS2812B); the other analog switch module (CH445P) is also electrically connected to the audio file decoding module (VS1003) and the LED color control module (WS2812B); the power input ends of the two analog switch modules (CH445P) are connected to a 3.3V DC power supply, and the two analog switch modules (CH445P) are also grounded; the analog switch uses a four-pole double-throw 3.3V low-resistance chip CH445P; the LED lights connected to the LED color control module are all driven by a constant current source TP4115; a fixed voltage regulator LD1086D2M33 is connected between the 3.3V DC power supply and the analog switch module;

[0054] The reset button is used to reset the program of the MCU module on the development board; the input capture module is connected to the MCU module. The input capture module includes a five-way button and a capacitive touch button. Both the five-way button and the capacitive touch button are used to capture input and transmit the captured input to the MCU module;

[0055] The wake-up module is connected to the MCU module and the power module, and is used to wake up the MCU module from the low power mode; the wake-up module is the wake up button set on the development board;

[0056] Figure 8 In the example, the drive circuit UL2003 is connected to the stepper motor, buzzer, relay and LED color control module; the button module is connected to the MCU module.

Claims

1. A development board for environmental sensor alarm and Internet of Things gateway, characterized in that: include: MCU module, program download interface, reset button, wireless communication module, input capture module, wake-up module, LED color control module, USB interface conversion module, Type-C interface conversion module, sensor module, motor speed measurement interface, Ethernet control module, audio file decoding module, infrared module, Zigbee sensor node module, wireless radio frequency identification module, level conversion module, display module, analog switch module, storage module, control LAN bus; The MCU module is respectively connected to the Ethernet control module, the audio file decoding module, the wireless radio frequency identification module, the level conversion module, the sensor module, the display module, the analog switch module, and the storage module; A Type-C interface conversion module, whose input end is connected to the output end of the USB interface conversion module; the Type-C interface conversion module is used to perform level conversion on the output of the USB interface conversion module; the Type-C interface conversion module and the USB interface conversion module are both connected to the MCU module; USB interface conversion module, used to realize USB communication; The wireless communication module is wirelessly connected to the sensor module, and the wireless communication module is connected to the MCU module; the wireless communication module is used to wirelessly connect to the host computer, wirelessly download the program from the host computer to the development board, and is used for communication with the sensor module; The program download interface is set on the MCU module, and the program download interface is connected to the host computer; An LED color control module, electrically connected to the MCU module, for adjusting the color of the connected LED lamp according to a control instruction sent by the MCU module; Zigbee sensor node module, connecting the wireless communication module and MCU module, is used for building wireless sensor networks and data transmission; The control LAN bus connects the MCU module, the Ethernet control module, the infrared module and the wireless radio frequency identification module and is used for serial protocol communication of each module.

2. The development board for environmental sensor alarm and Internet of Things gateway according to claim 1, characterized in that: The development board also has a power module and a power switch module; The USB interface conversion module is a USB female socket, which is used to realize USB communication between the MCU module and the host computer; the Type-C interface conversion module is a Type-C interface, which is used as a USB output interface and converts USB and TTL levels through the level conversion module; Two analog switch modules are provided, both of which are electrically connected to the MCU module, one of which is also electrically connected to the Ethernet control module and the LED color control module; the other analog switch module is also electrically connected to the audio file decoding module and the LED color control module; the power input ends of the two analog switch modules are both connected to a 3.3V DC power supply, and the two analog switch modules are also grounded; the analog switch uses a four-pole double-throw 3.3V low-resistance chip CH445P; the LED lights connected to the LED color control module are all driven by a constant current source TP4115; A fixed voltage regulator is connected between the 3.3V DC power supply and the analog switch module; The program download interface of the MCU module adopts a four-wire SWD interface. The four-wire SWD interface is connected to the J-Tag adapter board through a 4-pin cable, the J-Tag adapter board is connected to the J-Link emulator, the J-Link emulator is connected to the Micro-USB cable, and the Micro-USB cable is connected to the computer through the USB interface.

3. The development board for environmental sensor alarm and Internet of Things gateway according to claim 1, characterized in that: Reset button, used to reset the program of the MCU module on the development board.

4. The development board for environmental sensor alarm and Internet of Things gateway according to claim 3, characterized in that: The development board also provides multiple pins to select the program download location.

5. The development board for environmental sensor alarm and Internet of Things gateway according to claim 1, characterized in that: The input capture module is connected to the MCU module and is used to capture the input and transmit it to the MCU module.

6. The development board for environmental sensor alarm and Internet of Things gateway according to claim 5, characterized in that: The input capture module includes a five-way button and a capacitive touch button, both of which are used for input capture and transmit the captured input to the MCU module.

7. The development board for environmental sensor alarm and Internet of Things gateway according to claim 1, characterized in that: The wake-up module is connected to the MCU module and the power module, and is used to wake up the MCU module from the low power mode; the wake-up module is the wake up button set on the development board; The MCU module and the display module are connected through a plurality of female headers, and the female headers are connected to a 5V DC power supply; a voltage regulator module is connected between the 5V DC power supply and the female headers.

8. The development board for environmental sensor alarm and Internet of Things gateway according to claim 1, characterized in that: The infrared module includes a transmitting tube and a receiving tube, and the hardware bottom layer of the infrared module is connected to the serial port; Program download interface, used to download programs from the host computer to the development board via wired connection; The sensor module includes an acceleration sensor, a light sensor, a temperature and humidity sensor, a fire sensor and a reflective sensor; the fire sensor is used to detect the wavelength of light radiated by the fire to implement an alarm; the reflective sensor is used to detect reflected light; The motor speed measurement interface is connected to the DC motor through an H-bridge driving circuit to drive the DC motor; The RFID interface of the MCU module is connected to the wireless radio frequency identification module, and the wireless radio frequency identification module uses the S50 chip; The wireless communication module is the BC20 module.

9. The development board for environmental sensor alarm and Internet of Things gateway according to claim 1, characterized in that: It also includes an RS-485 communication circuit and a two-way relay; the RS-485 communication circuit is connected to the serial port on the MCU module through a level conversion chip for transmitting half-duplex data; the two-way relay is in a normally closed state.

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