Agricultural greenhouse controller circuit, circuit board assembly and electronic device

Abstract

The utility model relates to control technical field discloses a kind of agricultural greenhouse controller circuit, circuit board assembly and electronic equipment, and agricultural greenhouse controller circuit includes: communication module, power module, at least one function module, at least one communication interface module, at least one network interface module;Power module is connected respectively communication module, the power supply end of at least one communication interface module, at least one network interface module;Communication module is connected respectively at least one function module, at least one communication interface module, the communication end of at least one network interface module;Communication module is configured to communicate with at least one function module;Communication module is also configured to connect external equipment by at least one communication interface module;Communication module is also configured to carry out network communication by at least one network interface module. Thus, without setting MCU module, reduce the cost of greenhouse controller.

Description

Technical Field

[0001] This utility model relates to the field of control technology, and in particular to an agricultural greenhouse controller circuit, circuit board assembly and electronic equipment. Background Technology

[0002] As a major agricultural country, China has widely developed greenhouse farming to increase the yield of agricultural products per unit area. With the development of Internet of Things (IoT) technology, agricultural greenhouses are evolving towards automation and intelligence. Temperature control devices, humidity control devices, soil entropy detection devices, automatic irrigation devices, and automatic ventilation devices have been added inside the greenhouses. To connect and centrally control these automated devices, a smart agricultural greenhouse controller is installed in each greenhouse. This controller uses fieldbus, network communication, and cellular communication to manage the devices inside the greenhouse through a unified cloud server.

[0003] Existing greenhouse controllers are based on MCUs (Microcontroller Units), but MCUs are expensive, which in turn increases the cost of greenhouse controllers. Utility Model Content

[0004] The purpose of this utility model is to provide an agricultural greenhouse controller circuit, circuit board assembly and electronic equipment, which uses a communication module as the greenhouse controller, thereby eliminating the need to set up an MCU module and reducing the cost of the greenhouse controller.

[0005] To address the aforementioned technical problems, this utility model provides an agricultural greenhouse controller circuit, comprising: a communication module, a power supply module, at least one functional module, at least one communication interface module, and at least one network interface module; the power supply module is connected to the power supply terminals of the communication module, at least one communication interface module, and at least one network interface module; the communication module is connected to the communication terminals of at least one functional module, at least one communication interface module, and at least one network interface module; the communication module is configured to communicate with at least one functional module; the communication module is further configured to connect to external devices through at least one communication interface module; and the communication module is further configured to perform network communication through at least one network interface module.

[0006] Embodiments of this application also provide a circuit board assembly, including the above-described agricultural greenhouse controller circuit.

[0007] Embodiments of this application also provide an electronic device, including the circuit board assembly described above.

[0008] In some embodiments, the functional module is any one of the following: a touch screen, a camera, a temperature and humidity sensor, an audio module, a status display module, and an alarm module.

[0009] In some embodiments, the audio module includes an audio codec, an audio amplifier, a microphone, and a speaker; the communication module is connected to a first input terminal of the audio codec, and the microphone is connected to a second input terminal of the audio codec; the output terminal of the audio codec is connected to the input terminal of the audio amplifier, and the output terminal of the audio amplifier is connected to the speaker.

[0010] In some embodiments, the network interface module is any one of the following: an Ethernet interface circuit, a SIM card interface circuit; the Ethernet interface circuit includes an Ethernet control chip and an Ethernet connector; the SPI interface of the communication module is connected to the Ethernet connector through the MDI interface of the Ethernet control chip; the SIM card interface circuit includes a SIM card connector; the communication module is connected to the SIM card connector.

[0011] In some embodiments, the communication interface module is any one of the following: an RS485 interface module, a CAN interface module, or a relay interface module; wherein, the RS485 interface module includes a half-duplex transceiver and an RS485 connector, and the UART interface of the communication module is connected to the RS485 connector through the half-duplex transceiver; the CAN interface module includes a CAN transceiver and a CAN connector, and the CAN interface of the communication module is connected to the CAN connector through the CAN transceiver; the relay interface module includes a switch module, a relay, and a relay connector, the SPI interface of the communication module is connected to the control terminal of the switch module through the GPIO interface of the Ethernet control chip, the first terminal of the switch module is connected to the relay connector through the relay, and the second terminal of the switch module is grounded.

[0012] In some embodiments, the power supply module includes an AC / DC voltage module, a charging circuit, a battery, a DC / DC boost circuit, a first voltage regulator circuit, and a second voltage regulator circuit. The input terminal of the AC / DC voltage module is connected to AC mains power, and the output terminal of the AC / DC voltage module is connected to the input terminal of the charging circuit, the input terminal of the first voltage regulator circuit, and the input terminal of the second voltage regulator circuit, respectively. The output terminal of the charging circuit is connected to the battery. The battery is also connected to the input terminal of the DC / DC boost circuit, and the output terminal of the DC / DC boost circuit is connected to the input terminals of the first voltage regulator circuit and the second voltage regulator circuit, respectively. The output terminal of the first voltage regulator circuit is connected to at least one of the functional modules, at least one of the communication interface modules, and at least one of the network interface modules, respectively. The output terminal of the second voltage regulator circuit is connected to the communication module.

[0013] In some embodiments, the external device is any one of the following: a temperature control device, a humidity control device, a land entropy detection device, an automatic irrigation device, or an automatic ventilation device.

[0014] In some embodiments, the communication module is an LTE cellular module.

[0015] The embodiments of this application have at least the following advantages: This application uses a communication module as a greenhouse controller. The communication module enables communication with at least one functional module. The communication module connects to external devices through at least one communication interface module and performs network communication through at least one network interface module. Therefore, the communication, control, and network connection functions of the greenhouse controller can be realized without setting up an MCU module, which reduces the cost of the greenhouse controller while ensuring its functionality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the agricultural greenhouse controller circuit provided in this embodiment; Figure 2 This is a schematic diagram of the circuit principle of the LTE cellular module provided in this embodiment; Figure 3 This is another circuit diagram of the LTE cellular module provided in this embodiment; Figure 4 This is a schematic diagram of a structure of the agricultural greenhouse controller circuit provided in this embodiment; Figure 5 This is another schematic diagram of the structure of the agricultural greenhouse controller circuit provided in this embodiment; Figure 6 This is a schematic diagram of the charging circuit and battery provided in this embodiment; Figure 7This is a schematic diagram of the circuit principle of the first LDO chip in the first voltage regulator circuit provided in this embodiment; Figure 8 This is a schematic diagram of the circuit principle of the second LDO chip in the first voltage regulator circuit provided in this embodiment; Figure 9 This is a schematic diagram of the circuit principle of the third LDO chip in the first voltage regulator circuit provided in this embodiment; Figure 10 This is a schematic diagram of the circuit principle of the touch display screen provided in this embodiment; Figure 11 This is a schematic diagram of the circuit principle of the camera and level conversion module provided in this embodiment; Figure 12 This is a schematic diagram of the circuit principle of the audio module provided in this embodiment; Figure 13 This is a schematic diagram of the circuit principle of the light-emitting diode (LED) provided in this embodiment; Figure 14 This is a schematic diagram of the circuit principle of the buzzer provided in this embodiment; Figure 15 This is a schematic diagram of the Ethernet interface circuit provided in this embodiment; Figure 16 This is a schematic diagram of the SIM card interface circuit provided in this embodiment; Figure 17 This is a schematic diagram of the circuit principle of the CAN interface module provided in this embodiment; Figure 18 This is a schematic diagram of the circuit principle of the PWRKEY button provided in this embodiment. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0018] The smart agricultural greenhouse controller uses fieldbus, network communication, and cellular communication to manage the devices inside the agricultural greenhouse through a unified cloud server. Existing greenhouse controllers are based on MCUs (Microcontroller Units), but MCUs are expensive, which in turn increases the cost of greenhouse controllers.

[0019] To implement a greenhouse controller without using an MCU, this utility model discloses an agricultural greenhouse controller circuit, including: a communication module, a power supply module, at least one functional module, at least one communication interface module, and at least one network interface module; the power supply module is connected to the power supply terminals of the communication module, at least one communication interface module, and at least one network interface module respectively; the communication module is connected to the communication terminals of at least one functional module, at least one communication interface module, and at least one network interface module respectively; the communication module is configured to communicate with at least one functional module; the communication module is also configured to connect to external devices through at least one communication interface module; and the communication module is further configured to perform network communication through at least one network interface module.

[0020] This application uses a communication module as a greenhouse controller. The communication module enables communication with at least one functional module. The communication module connects to external devices through at least one communication interface module and performs network communication through at least one network interface module. Therefore, the communication, control, and network connection functions of the greenhouse controller can be realized without setting up an MCU module, which reduces the cost of the greenhouse controller while ensuring its functionality.

[0021] One embodiment of this application provides an agricultural greenhouse controller circuit, such as... Figure 1 The diagram shown is a structural schematic of the agricultural greenhouse controller circuit of this embodiment. The agricultural greenhouse controller circuit of this embodiment includes: a communication module, a power supply module, at least one functional module, at least one communication interface module, and at least one network interface module.

[0022] Specifically, the power supply module is connected to the power supply terminals of the communication module, at least one communication interface module, and at least one network interface module; the communication module is connected to the communication terminals of at least one functional module, at least one communication interface module, and at least one network interface module; the communication module is configured to communicate with at least one functional module; the communication module is also configured to connect to external devices through at least one communication interface module; and the communication module is also configured to perform network communication through at least one network interface module.

[0023] In some embodiments, the communication module is an LTE (Long Term Evolution) cellular module. Examples include 2G / 3G modules (such as GSM / GPRS modules), 4G modules, 5G modules, and NB-IoT (Narrowband Internet of Things) modules. The LTE cellular module model can be EG800Z.

[0024] like Figure 2 The diagram shown is a schematic of the circuit principle of an LTE cellular module. Figure 3The diagram shows another circuit principle of an LTE cellular module. The LTE cellular module has multiple functional interfaces, which are connected to a power supply module, at least one functional module, at least one communication interface module, and at least one network interface module to realize the corresponding charging and communication functions.

[0025] like Figure 4 The diagram shown is a schematic representation of one structure of the agricultural greenhouse controller circuit in this embodiment. Figure 5 The diagram shown is a schematic diagram of another structure of the agricultural greenhouse controller circuit in this embodiment.

[0026] The power supply module includes an AC / DC voltage module, a charging circuit, a battery, a DC / DC boost circuit, a first voltage regulator circuit, and a second voltage regulator circuit. The input terminal of the AC / DC voltage module is connected to AC 220V, and the output terminal of the AC / DC voltage module is connected to the input terminals of the charging circuit, the first voltage regulator circuit, and the second voltage regulator circuit, respectively. The output terminal of the charging circuit is connected to the battery. The battery is also connected to the input terminal of the DC / DC boost circuit, and the output terminal of the DC / DC boost circuit is connected to the input terminals of the first voltage regulator circuit and the second voltage regulator circuit, respectively. The output terminal of the first voltage regulator circuit is connected to at least one functional module, at least one communication interface module, and at least one network interface module, respectively. The output terminal of the second voltage regulator circuit is connected to the communication module.

[0027] like Figure 6 The diagram shows the circuit principle of the charging circuit and the battery. The charging circuit uses an ETA4056D6I charging chip, which has multiple pins including positive voltage input VIN, charging completion indicator STDBY, status indicator STAT, enable control EN, package pin EP, battery connection pin BAT, charging current setting pin ISET, temperature detection input NTC, and ground pin GND.

[0028] The charging chip's VIN pin is connected to the AC / DC voltage module for inputting 5V DC power; the VIN pin is connected to the STDBY pin via a diode and a resistor; the VIN pin is connected to the STAT pin via a diode and a resistor; the VIN pin is also connected to the EN pin; the EP pin is grounded to ensure normal charging operation, providing a stable reference potential and helping to reduce electromagnetic interference; the BAT pin is connected to the battery for charging; the ISET pin is grounded via a resistor; the NTC pin and GND pin are both grounded.

[0029] refer to Figure 4 , Figure 5 The agricultural greenhouse controller circuit also includes two diodes, D1 and D2.

[0030] An AC / DC voltage module can convert 220V AC to 5V DC for a 20W AC / DC voltage module. This 5V DC can then be used to charge a 1000mAh battery (such as a polymer lithium battery) through a charging circuit (such as a charging chip with the model number ETA4056).

[0031] The 5V DC voltage output from the AC / DC voltage module passes through diode D1. One path connects to the functional module, communication interface module, and network interface module via the first voltage regulator circuit, while the other path connects to the communication module via the second voltage regulator circuit.

[0032] The battery passes through a DC-DC boost circuit and another diode (such as...) in sequence. Figure 4 , Figure 5 After D2), one path connects to the functional module, communication interface module, and network interface module via an LDO voltage regulator circuit, while the other path connects to the communication module via a second voltage regulator circuit. The DC / DC boost circuit converts the DC voltage output from the battery to 4.9V, and the output current of both diodes D1 and D2 is 4.7V DC.

[0033] The voltage across diode D1 and the voltage across diode D2 form a power-down switching circuit. When there is mains power (220V), the voltage output from the AC / DC voltage module is used to power the entire circuit. When there is no mains power (220V), the battery voltage is used to boost the voltage and power the entire circuit.

[0034] The first voltage regulator circuit outputs multiple voltages. It converts 4.7V DC to 3.3V through an LDO chip SGM2028, and converts 4.7V DC to 2.8V and 1.8V through two LDO chips SGM2019 to power the functional module, communication interface module and network interface module. The second voltage regulator circuit outputs one voltage to convert the 4.7V DC to 4V to power the communication module.

[0035] like Figure 7 The diagram shown is a schematic diagram of the circuit principle of the first LDO chip in the first voltage regulator circuit.

[0036] The first LDO chip is SGM2028-3.3Y, which has input pin IN, enable control pin EN, output pin OUT, bypass pin BP, and ground pin GND. The IN pin is connected to the output of the AC / DC voltage module and the output of the DC / DC boost circuit, respectively, to realize AC power supply and battery power supply, and is used to receive 4.7V DC power. The input pin IN is also connected to the enable control pin EN. The output pin OUT is used to output 3.3V DC power. The bypass pin BP is grounded through a capacitor, and the ground pin GND is grounded.

[0037] like Figure 8 The diagram shown is a schematic of the circuit principle of the second LDO chip in the first voltage regulator circuit.

[0038] The second LDO chip is SGM2019-ADJ, which has input pin IN, enable control pin EN, output pin OUT, bypass pin BP, and ground pin GND. The IN pin is connected to the output of the AC / DC voltage module and the output of the DC / DC boost circuit, respectively, to realize AC power supply and battery power supply, and is used to receive 4.7V DC power. The input pin IN is also connected to the enable control pin EN. The output pin OUT is used to output 2.8V DC power. The bypass pin BP is grounded through a capacitor, and the ground pin GND is grounded.

[0039] like Figure 9 The diagram shown is a schematic of the circuit principle of the third LDO chip in the first voltage regulator circuit.

[0040] The third LDO chip is SGM2019-ADJY, which has input pin IN, enable control pin EN, output pin OUT, bypass pin BP, and ground pin GND. The IN pin is connected to the output of the AC / DC voltage module and the output of the DC / DC boost circuit, respectively, to realize AC power supply and battery power supply, and is used to receive 4.7V DC power. The input pin IN is also connected to the enable control pin EN. The output pin OUT is used to output 1.8V DC power. The bypass pin BP is grounded through a capacitor, and the ground pin GND is grounded.

[0041] The functional modules in this embodiment can be any of the following: touch screen, camera, temperature and humidity sensor, audio module, status display module, and alarm module.

[0042] refer to Figure 4 , Figure 5 The touch display includes an LCD display and a touch screen. The first voltage regulator circuit of the power supply module is connected to the display and the touch screen, providing a 3.3V voltage to the display and the touch screen. The communication module is connected to the LCD display through the LCD_SPI interface and to the touch screen through the TP_I2C interface.

[0043] like Figure 10 The diagram shown is a schematic diagram of the circuit principle of a touch screen display.

[0044] The touch display screen includes interfaces such as VCC, GND, LCD_CS, LCD_RST, LCD_RS, SDI (MOSI), LCD_SCK, LED, SDO (MISO), CTP_SCL, CTP_RST, CTP_SDA, CTP_INT, and SD_CS.

[0045] The touchscreen's VCC interface is connected to VDD_3V3 (i.e., connected to 3.3V DC), and the GND interface is grounded. The LCD_CS interface connects to the LTE cellular module's LCD_SPI_CS interface; the LCD_RST interface connects to the LTE cellular module's LCD_RST interface; the LCD_RS interface connects to the LTE cellular module's LCD_SPI_RS interface; the SDI (MOSI) interface connects to the LTE cellular module's LCD_SPI_DOUT interface; the LCD_SCK interface connects to the LTE cellular module's LCD_SPI_CLK interface; the LED interface connects to the LTE cellular module's LCD_PWM1 interface; the SDO (MISO) interface connects to the LTE cellular module's LCD_TE interface; the CTP_SCL interface connects to the LTE cellular module's I2C0_SCL interface; the CTP_RST interface connects to the LTE cellular module's LCD_CTP_RST interface; the CTP_SDA interface connects to the LTE cellular module's I2C0_SDA interface; the CTP_INT interface connects to the LTE cellular module's CTP_INT interface; and the SD_CS interface connects to the LTE cellular module's GPIO2 interface.

[0046] refer to Figure 4 , Figure 5 The first voltage regulator circuit of the power supply module is connected to the camera, providing 2.8V and 1.8V voltages to the camera, which are used to power different functional modules in the camera. The communication module is connected to the camera via CAM_SPI and CAM_I2C interfaces. Since the voltage of the communication module differs from that of the camera, a level conversion module is also installed between the communication module and the camera to prevent damage to the camera from the communication module's voltage. The communication module is connected to the level conversion module via CAM_SPI and CAM_I2C interfaces, and the CAM_SPI and CAM_I2C interfaces of the level conversion module are connected to the camera. The level conversion module converts the 3.3V voltage from the CAM_SPI and CAM_I2C interfaces of the communication module to 1.8V.

[0047] The camera can capture images inside the agricultural greenhouse in real time to assist relevant personnel in observing the on-site conditions inside the greenhouse. In specific implementation, the camera can be a 300,000-pixel camera. This embodiment does not limit the structure, implementation principle, or specific model of the camera. The camera model can be FH34RJ-16S-0.5SH(50), and the level conversion module model can be TXB0108PWR.

[0048] like Figure 11 The diagram shown is a schematic diagram of the circuit principle of the camera and the level conversion module.

[0049] The camera has CAM_VDD, CAM_VDDIO, CAM_I2C_SLK, CAM_I2C_SDA, CAM_SPI_CLK, CAM_MCLK, CAM_SPI_DATA0, CAM_SPI_DATA1, CAM_RST, and CAM_PWDN; the level conversion module has CAM_SPI_CLK_1V8, CAM_MCLK_1V8, CAM_SPI_DATA0_1V8, CAM_SPI_DATA1_1V8, CAM_I2C_SCL_1V8, CAM_I2C_SDA_1V8, CAM_RST_1V8, and CAM_PWDN_1V8. Interfaces such as CAM_SPI_CLK, CAM_MCLK, CAM_SPI_DATA0, CAM_SPI_DATA1, CAM_I2C_SCL, CAM_I2C_SDA, CAM_LED1, and CAM_PWDN.

[0050] The camera's CAM_VDD is used to connect to VDD_2V8, which is a 2.8V DC power supply, and the camera's CAM_VDDIO is used to connect to VDD_1V8, which is a 1.8V DC power supply.

[0051] The camera's interfaces CAM_I2C_SLK, CAM_I2C_SDA, CAM_SPI_CLK, CAM_MCLK, CAM_SPI_DATA0, CAM_SPI_DATA1, CAM_RST, and CAM_PWDN are respectively connected to the level conversion module's interfaces CAM_I2C_SCL_1V8, CAM_I2C_SDA_1V8, CAM_SPI_CLK_1V8, CAM_MCLK_1V8, CAM_SPI_DATA0_1V8, CAM_SPI_DATA1_1V8, CAM_RST_1V8, and CAM_PWDN_1V8.

[0052] The VCCA interface of the level conversion module connects to VDD_1V8 (i.e., 1.8V DC), and the VCCB interface connects to VDD_3V3 (i.e., 3.3V DC). The interfaces CAM_SPI_CLK, CAM_MCLK, CAM_SPI_DATA0, CAM_SPI_DATA1, CAM_I2C_SCL, CAM_I2C_SDA, CAM_LED1, and CAM_PWDN of the level conversion module connect to the CAM_SPI and CAM_I2C interfaces of the LTE cellular module, respectively.

[0053] refer to Figure 4 , Figure 5The first voltage regulator circuit of the power supply module is connected to the temperature and humidity sensor, providing it with a 3.3V voltage. The communication module is connected to the temperature and humidity sensor via an I2C interface. In practice, the temperature and humidity sensor can collect ambient temperature and humidity data. The temperature and humidity sensor can be the SHT41 temperature and humidity sensor evaluation kit; this embodiment does not limit the structure, implementation principle, or specific model of the temperature and humidity sensor.

[0054] Specifically, the audio module includes an audio codec (Codec chip ES8311), an audio amplifier (audio PA chip), a microphone, and a speaker; the communication module is connected to the first input terminal of the audio codec, and the microphone is connected to the second input terminal of the audio codec; the output terminal of the audio codec is connected to the input terminal of the audio amplifier, and the output terminal of the audio amplifier is connected to the speaker.

[0055] The audio codec can be a codec chip (ES8311) or other chips, and the audio amplifier can be a CS8126S or other chips. In this embodiment, voice calls can be realized through the audio module. The PCM and I2C interfaces of the communication module (such as an LTE cellular module) are connected to the audio codec to realize microphone input and realize the voice signal through the audio amplifier (such as CS8126S) to the speaker.

[0056] like Figure 12 The diagram shown is a schematic of the circuit principle of the audio module.

[0057] The audio codec has interfaces such as MICP / DMIC_SDA, MIC1N, OUTN, OUTP, DVDD, PVDD, DGND, MCLK, SCLK / DMIC_SCL, LRCK, ASDOUT, DSDIN, CCLK, CDATA, CE, AVDD, PGND, AGND, VIMID, ADCVREF, and DACVREF.

[0058] The audio amplifier has interfaces such as output positive terminal VO+, power supply terminal VDD, ground terminal GND, output negative terminal VO-, input negative terminal -IN, input positive terminal +IN, NC (indicating that the pin is not used in the circuit), and control terminal SD.

[0059] The MICP / DMIC_SDA interface of the audio codec is connected to VDD_3V3, which is equivalent to 3.3V DC power. The MICP / DMIC_SDA interface and the MIC1N interface are also connected to the two ends of the microphone respectively. The AVDD interface of the audio codec is connected to VDD_3V3, which is equivalent to 3.3V DC power. The PGND, AGND, VIMID, ADCVREF, and DACVREF of the interface are all grounded.

[0060] The audio codec interfaces DVDD and PVDD are connected to VDD_3V3 (3.3V DC), while interfaces DGND and MCLK are grounded. Interfaces SCLK / DMIC_SCL are connected to the LTE cellular module's PCM_CLK interface; interface LRCK is connected to the LTE cellular module's PCM_SYNC interface; interface ASDOUT is connected to the LTE cellular module's PCM_DIN interface; interface DSDIN is connected to the LTE cellular module's PCM_DOUT interface; interface CCLK is connected to the LTE cellular module's I2C0_SCL interface; interface CDATA is connected to the LTE cellular module's I2C0_SDA interface; interface CE is connected to two resistors, one of which is connected to VDD_3V3 (3.3V DC), and the other is grounded.

[0061] The OUTN and OUTP interfaces of the audio codec are connected to the -IN and +IN interfaces of the audio amplifier, respectively; the power supply terminal VDD of the audio amplifier is connected to the reference voltage VBAT, and the ground terminal GND is grounded; the positive output terminal VO+ and the negative output terminal VO- of the audio amplifier are connected to the speaker, respectively.

[0062] refer to Figure 4 , Figure 5 The status display module can be a light-emitting diode (LED) to indicate the working status of the communication module. The communication module connects to the LED via a GPIO interface, and the number of LEDs can be two. The alarm module can be a buzzer (BEEP) to provide status feedback to the communication module. The communication module connects to the buzzer via a GPIO interface.

[0063] like Figure 13 The diagram shown is a schematic diagram of the circuit principle of a light-emitting diode (LED).

[0064] The LED is model LTST-C193KHKT-5A. The anode of the LED is connected to a 4V DC power supply via a resistor. The cathode of the LED is connected to the first terminal of a transistor, and the second terminal of the transistor is grounded. The control terminal of the transistor is connected to the STATUS or NET_STATUS interface of the LTE cellular module. The transistor model is DTC043ZEBTL. In some embodiments, the cathode of the LED can be directly grounded, without using a transistor for control.

[0065] like Figure 14 The diagram shown is a schematic diagram of the circuit principle of a buzzer.

[0066] The first terminal of the buzzer is connected to a 4V DC power supply, and the second terminal of the buzzer is grounded through a MOSFET. The first and second terminals of the buzzer are connected by a diode, and the control terminal of the MOSFET is connected to the BEEP interface of the LTE cellular module.

[0067] The network interface module in this embodiment can be any one of the following: an Ethernet interface circuit or a SIM card interface circuit.

[0068] refer to Figure 4 , Figure 5 The Ethernet interface circuit includes an Ethernet control chip and an Ethernet connector (Transformer + RJ45). The SPI interface of the communication module is connected to the Ethernet connector through the MDI interface of the Ethernet control chip. The first voltage regulator circuit of the power supply module is connected to the Ethernet control chip to provide 3.3V voltage to the Ethernet control chip. The Ethernet control chip can be a CH390D chip or other chips. The Ethernet connector can be an RJ45 connector with integrated network transformer (Transformer + RJ45) to realize a network port with a speed of 100MHz.

[0069] like Figure 15 The diagram shown is a schematic diagram of the Ethernet interface circuit.

[0070] The Ethernet controller chip (CH390D) has interfaces such as VDDK, MDIRP, MDIRP, MDIRN, MDITP, MDIRN, AVDD33 / VDDIO, WOL, RSVD, SDO / MISO, AVDD33, SCS, SCK, SDI / MOSI, INT, GPIO3, LED2ACT, LED1SPD, RSTB, XI, XO, and GND.

[0071] Ethernet connectors have interfaces such as TD+, TD-, RD+, RD-, CT1, CT2, GND, Y+, Y-, G+, and G-.

[0072] The Ethernet controller chip's interfaces AVDD33 / VDDIO and AVDD33 are both grounded; the SDO / MISO interface connects to the LTE cellular module's NET_SPI_SDO interface; the SCS interface connects to the LTE cellular module's NET_SPI_CS interface; the SCK interface connects to the LTE cellular module's NET_SPI_CLK interface; the SDI / MOSI interface connects to the LTE cellular module's NET_SPI_SD interface; the INT interface connects to the LTE cellular module's LAN_INT interface; the LED2ACT interface connects to LINK_LED, which indicates the network link status and is usually lit when the network connection is successful and the link is valid; the LED1SPD interface connects to ACT_LED, which indicates the network activity status and flashes when the network is transmitting or receiving data.

[0073] The crystal input XI and crystal output XO of the Ethernet controller chip are both connected to a crystal oscillator; the interfaces VDDK and GND of the Ethernet controller chip are grounded.

[0074] The Ethernet controller chip's interfaces MDIRP, MDIRN, MDITP, and MDITN are connected to the Ethernet connector's interfaces TD+, TD-, RD+, and RD-, respectively. The Ethernet connector's interfaces Y+ and G+ are both connected to VDD_3V3, i.e., connected to 3.3V DC power. Interface Y- is connected to ACT_LED, and interface G- is connected to LINK_LED.

[0075] refer to Figure 4 , Figure 5 The SIM card interface circuit in this embodiment includes a SIM card connector; the communication module is connected to the SIM card connector. This embodiment can achieve wired network communication with external systems via Ethernet, and achieve wireless communication with external systems via LTE cellular networks through the SIM card.

[0076] like Figure 16 The diagram shown is a schematic diagram of the SIM card interface circuit.

[0077] The SIM card connector model is MUP-C7801-2. The SIM card connector has interfaces such as programming terminal VPP, data input / output terminal IO, card detection signal terminal CD, voltage terminal VCC, reset terminal RST, clock signal terminal CLK, and ground terminals GND, GND1, and GND2.

[0078] The data input / output terminal IO is used to connect to the USIM1_DATA interface of the LTE cellular module. The voltage terminal VCC is used to receive the voltage USIM1_VDD. The voltage terminal VCC is also grounded through a resistor and a capacitor. The reset terminal RST is used to connect to the USIM1_RST interface of the LTE cellular module. The clock signal terminal CLK is used to connect to the USIM1_CLK interface of the LTE cellular module. The ground terminals GND, GND1, and GND2 are all grounded.

[0079] refer to Figure 4 , Figure 5 The communication interface module in this embodiment can be any one of the following: an RS485 interface module (RS-485 transceiver chip), a CAN interface module, or a relay interface module; wherein, the RS485 interface module includes a half-duplex communication transceiver and an RS485 connector, and the UART interface of the communication module is connected to the RS485 connector through the half-duplex communication transceiver; the first voltage regulator circuit of the power supply module is connected to the half-duplex communication transceiver to provide a 3.3V voltage to the half-duplex communication transceiver; the half-duplex communication transceiver can be a SIT3088EESA chip or other chips.

[0080] The CAN interface module includes a CAN transceiver (SIT65HVD230DR) and a CAN connector. The CAN interface of the communication module is connected to the CAN connector through the CAN transceiver. The first voltage regulator circuit of the power supply module is connected to the CAN transceiver to provide 3.3V voltage to the CAN transceiver. The CAN transceiver can be SIT65HVD230DR or other models.

[0081] like Figure 17 The diagram shown is a schematic of the circuit principle of the CAN interface module.

[0082] The CAN transceiver has interfaces including mode selection pin Rs, CAN bus high-side CANH, CAN bus low-side CANL, reference voltage output pin Vref, transmit input pin D, ground pin GND, power supply pin Vcc, and receive output pin R. The transmit input terminal D and receive output terminal R of the CAN transceiver are connected to the CAN_TXD and CAN_RXD interfaces of the LTE cellular module, respectively. The power supply terminal Vcc is connected to VDD_3V3 voltage, i.e., connected to 3.3V DC power, and the ground terminal GND is grounded. The high-side CANH and low-side CANL of the CAN bus of the CAN transceiver are connected to the first and second terminals of the CAN connector, respectively. The third terminal of the CAN connector is grounded. The model of the CAN connector can be WX-ZB012V-30-3S.

[0083] refer to Figure 4 , Figure 5The relay interface module includes a switch module, a relay, and a relay connector. The SPI interface of the communication module is connected to the control terminal of the switch module through the GPIO interface of the Ethernet control chip. The first terminal of the switch module is connected to the relay connector through the relay, and the second terminal of the switch module is grounded.

[0084] The external equipment can be any of the following: temperature control device, humidity control device, land entropy detection device, automatic irrigation device, or automatic ventilation device.

[0085] The smart agricultural greenhouse controller in this embodiment can connect to multiple automatic irrigation devices via an RS485 bus for controlling automatic irrigation, connect to multiple automatic ventilation devices via a CAN bus for controlling greenhouse ventilation, control the temperature inside the agricultural greenhouse via a temperature control device, control the humidity inside the agricultural greenhouse via a humidity control device, and monitor the degree of soil quality degradation via a land entropy detection device to generate a negative entropy planting plan (such as adjusting irrigation, crop rotation, or fertilization) to maintain soil health.

[0086] After the smart agricultural greenhouse controller in this embodiment is powered on normally, pressing the PWRKEY button will automatically power on the LTE cellular module EG800Z. After the EG800Z is automatically powered on, it will first establish a cellular network connection for the smart agricultural greenhouse controller. Then, it will acquire various environmental parameters inside the greenhouse based on the fieldbus. The program will access the server and report the environmental parameters inside the greenhouse to the server. Based on the environmental parameters and the preset algorithm, the server will send instructions to the LTE cellular module, which will then control the irrigation, ventilation and other functions inside the greenhouse through RS485 bus, CAN bus, relays and other means.

[0087] like Figure 18 The diagram shown is a schematic of the circuit principle of the PWRKEY button.

[0088] In one embodiment, the first terminal of the push-button switch is connected to the first terminal of the WX1145102150 chip, and the second terminal of the push-button switch is grounded; the first terminal of the WX1145102150 chip also outputs PWRKEY to the LTE cellular module through a resistor, and the first terminal of the WX1145102150 chip is also grounded through a bidirectional diode.

[0089] In another embodiment, the first terminal of the push-button switch outputs PWRKEY to the LTE cellular module through a resistor, and the second terminal of the push-button switch is grounded; the first terminal of the push-button switch is also grounded through a capacitor, and the first terminal of the push-button switch is also grounded through a bidirectional diode.

[0090] The agricultural greenhouse controller circuit provided in this embodiment is a smart agricultural greenhouse controller circuit that integrates multiple communication methods, multiple interaction methods, and multiple sensing methods.

[0091] The agricultural greenhouse controller circuit provided in this embodiment is centered on a communication module (such as an LTE cellular module) and uses the communication module (such as an LTE cellular module) as the main control module, eliminating the need for an MCU. This saves the cost of an MCU from the agricultural greenhouse controller circuit provided in this embodiment.

[0092] The agricultural greenhouse controller circuit provided in this embodiment is powered by an external 220V AC mains power supply and is internally designed with a battery (such as a lithium battery) and a charging circuit. In the event of a mains power outage, the communication module (such as an LTE cellular module) can continue to work and can sense the power outage, thereby notifying the server of the power outage time of the agricultural greenhouse so that timely manual intervention can be carried out.

[0093] One embodiment of this application also provides a circuit board assembly, including: the agricultural greenhouse controller circuit of the above embodiment.

[0094] By incorporating the aforementioned agricultural greenhouse controller circuit, the circuit board assembly in this embodiment reduces the cost of the greenhouse controller while ensuring its functionality, thereby lowering the cost of the circuit board assembly.

[0095] An embodiment of this application also provides an electronic device, including: the circuit board assembly described in the above embodiment.

[0096] The electronic device in this embodiment reduces the cost of the greenhouse controller while ensuring its functionality by setting the circuit board assembly described above, thereby reducing the cost of the electronic device.

[0097] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A controller circuit for an agricultural greenhouse, characterized in that, include: A communication module, a power supply module, at least one functional module, at least one communication interface module, and at least one network interface module; The power supply module is connected to the power supply terminals of the communication module, at least one of the communication interface modules, and at least one of the network interface modules, respectively; the communication module is connected to the communication terminals of at least one of the functional modules, at least one of the communication interface modules, and at least one of the network interface modules, respectively. The communication module is configured to communicate with at least one of the functional modules; the communication module is also configured to connect to an external device through at least one of the communication interface modules; the communication module is also configured to perform network communication through at least one of the network interface modules.

2. The agricultural greenhouse controller circuit according to claim 1, characterized in that, The functional module is any one of the following: Touch screen, camera, temperature and humidity sensor, audio module, status display module, alarm module.

3. The agricultural greenhouse controller circuit according to claim 2, characterized in that, The audio module includes an audio codec, an audio amplifier, a microphone, and a speaker; The communication module is connected to the first input terminal of the audio codec, and the microphone is connected to the second input terminal of the audio codec; the output terminal of the audio codec is connected to the input terminal of the audio amplifier, and the output terminal of the audio amplifier is connected to the speaker.

4. The agricultural greenhouse controller circuit according to claim 1, characterized in that, The network interface module is any one of the following: Ethernet interface circuit, SIM card interface circuit; The Ethernet interface circuit includes an Ethernet control chip and an Ethernet connector; the SPI interface of the communication module is connected to the Ethernet connector through the MDI interface of the Ethernet control chip. The SIM card interface circuit includes a SIM card connector; the communication module is connected to the SIM card connector.

5. The agricultural greenhouse controller circuit according to claim 1, characterized in that, The communication interface module is any one of the following: RS485 interface module, CAN interface module, relay interface module; The RS485 interface module includes a half-duplex transceiver and an RS485 connector. The UART interface of the communication module is connected to the RS485 connector through the half-duplex transceiver. The CAN interface module includes a CAN transceiver and a CAN connector, and the CAN interface of the communication module is connected to the CAN connector through the CAN transceiver; The relay interface module includes a switch module, a relay, and a relay connector. The SPI interface of the communication module is connected to the control terminal of the switch module through the GPIO interface of the Ethernet control chip. The first terminal of the switch module is connected to the relay connector through the relay, and the second terminal of the switch module is grounded.

6. The agricultural greenhouse controller circuit according to claim 1, characterized in that, The power supply module includes an AC / DC voltage module, a charging circuit, a battery, a DC / DC boost circuit, a first voltage regulator circuit, and a second voltage regulator circuit. The input terminal of the AC / DC voltage module is connected to the mains power, and the output terminal of the AC / DC voltage module is connected to the input terminal of the charging circuit, the input terminal of the first voltage regulator circuit, and the input terminal of the second voltage regulator circuit, respectively; the output terminal of the charging circuit is connected to the battery. The battery is also connected to the input terminal of the DC / DC boost circuit, and the output terminal of the DC / DC boost circuit is connected to the input terminal of the first voltage regulator circuit and the input terminal of the second voltage regulator circuit, respectively. The output terminal of the first voltage regulator circuit is connected to at least one of the functional modules, at least one of the communication interface modules, and at least one of the network interface modules, respectively; the output terminal of the second voltage regulator circuit is connected to the communication module.

7. The agricultural greenhouse controller circuit according to claim 1, characterized in that, The external device is any one of the following: Temperature control device, humidity control device, land entropy detection device, automatic irrigation device, automatic ventilation device.

8. The agricultural greenhouse controller circuit according to claim 1, characterized in that, The communication module is an LTE cellular module.

9. A circuit board assembly, characterized in that, include: The agricultural greenhouse controller circuit according to any one of claims 1 to 8.

10. An electronic device, characterized in that, include: The circuit board assembly of claim 9.

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