Carbon dioxide emitter control circuit and electronic equipment

Abstract

The utility model relates to the technical field of indoor planting environments, in particular to a carbon dioxide emitter control circuit and electronic equipment. The circuit comprises a power supply module, a sensing module, a processing module, a transceiver module and a drive screen module, the power supply module comprises a first conversion unit and a second conversion unit; the output end of the first conversion unit is connected with the second conversion unit and the drive screen module, and the output end of the second conversion unit is connected with the first input end of the processing module; the output end of the sensing module is connected with the second input end of the processing module; the first output end of the processing module is connected with the carbon dioxide emitter; the second output end of the processing module is connected with the input end of the transceiver module, and the output end of the transceiver module is connected with the upper computer. The third input end of the processing module is connected with the drive screen module which is connected with the display screen. According to the invention, the carbon dioxide emitter in the indoor environment control device can control emission only when illumination exists, so that efficient utilization of resources is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of indoor planting environments, and in particular to a carbon dioxide emitter control circuit and electronic equipment. Background Art

[0002] In indoor growing environments, plant growth is highly dependent on photosynthesis, and the smooth progress of photosynthesis requires sufficient light, carbon dioxide, and suitable temperature and humidity conditions. There are already a variety of indoor growing environment control devices on the market, which usually monitor and regulate parameters such as light, carbon dioxide, temperature and humidity through feedback mechanisms to ensure the healthy growth of plants. However, the main drawback of these devices is that they usually continue to release carbon dioxide regardless of whether photosynthesis has begun, especially when the light conditions are insufficient. In this case, the plants cannot carry out photosynthesis, and the released carbon dioxide will unnecessarily consume their stored resources, resulting in energy waste and increased operating costs. Therefore, there is an urgent need for an improved solution that can release carbon dioxide only under light conditions, thereby avoiding unnecessary waste of resources and environmental burden.

[0003] Currently, existing indoor cultivation environment control devices lack the ability to intelligently identify the state of photosynthesis and cannot determine whether to activate CO2 emitters based on the availability of light conditions. This not only wastes energy but also increases operating and maintenance costs. Therefore, designing a system that can activate CO2 emission only when light is present to ensure efficient resource utilization is crucial for improving plant productivity and health and also contributes to the realization of green and sustainable indoor cultivation technology. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the present application provides a carbon dioxide emitter control circuit and electronic equipment, which can control the carbon dioxide emitter in the indoor environment control device to emit only when there is light, thereby ensuring efficient use of resources and further realizing green and sustainable indoor planting technology.

[0005] The technical solution adopted by this application to solve its technical problems is:

[0006] In a first aspect, the present application provides a carbon dioxide transmitter control circuit, the circuit comprising: a power module, a sensor module, a processing module, a transceiver module and a screen drive module;

[0007] The power supply module includes a first conversion unit and a second conversion unit; the input end of the first conversion unit is connected to an external DC signal source, the output end is connected to the input end of the second conversion unit and the input end of the screen driving module, and the output end of the second conversion unit is connected to the first input end of the processing module;

[0008] The output end of the sensing module is connected to the second input end of the processing module, and is used to output the acquired environmental parameters to the processing module, wherein the environmental parameters include light parameters and carbon dioxide parameters;

[0009] The first output end of the processing module is connected to an external carbon dioxide emitter load, and is used to determine a corresponding emitter control signal according to the illumination parameter and the carbon dioxide parameter to control the on / off of the carbon dioxide emitter load;

[0010] The second output end of the processing module is connected to the input end of the transceiver module, and the output end of the transceiver module is connected to an external host computer; the third input end of the processing module is connected to the input end of the screen drive module, and the output end of the screen drive module is connected to an external display screen.

[0011] Optionally, the first conversion unit includes a buck converter, a first filtering subunit, a frequency modulation subunit, a freewheeling subunit, an energy storage subunit and a voltage dividing subunit;

[0012] The first end of the buck converter is connected to the first end of the DC signal source, and the second end of the DC signal source is grounded;

[0013] One end of the first filtering subunit is connected to the connection point between the DC signal source and the buck converter, and the other end is grounded;

[0014] One end of the frequency modulation subunit is connected to the second end of the buck converter, and the other end is grounded;

[0015] The third end of the buck converter is connected to one end of the freewheeling subunit and one end of the energy storage subunit, the other end of the freewheeling subunit is grounded, and the other end of the energy storage subunit is connected to the input end of the second conversion unit and the input end of the screen driving module;

[0016] The connection between the energy storage subunit and the second conversion unit is connected to the first end of the voltage divider subunit, the second end of the voltage divider subunit is grounded, and the third end of the voltage divider subunit is connected to the fourth end of the buck converter.

[0017] Optionally, the second conversion unit includes a low voltage dropout linear regulator and a second filtering subunit;

[0018] The input end of the low voltage difference linear regulator is connected to the connection point of the energy storage subunit and the voltage dividing subunit, and the output end of the low voltage difference linear regulator is connected to the first input end of the processing module;

[0019] One end of the second filtering subunit is connected to the connection point between the low voltage dropout linear regulator and the processing module, and the other end is grounded.

[0020] Optionally, the processing module includes a single chip microcomputer; the sensing module includes a carbon dioxide sensing unit, a light sensing unit and a temperature and humidity sensing unit;

[0021] The first end of the single chip microcomputer is connected to the connection point between the low voltage drop linear regulator and the second filtering subunit;

[0022] The second end of the single chip microcomputer is connected to the output end of the carbon dioxide sensor unit, the third end of the single chip microcomputer is connected to the input end of the light sensor unit, and the output end of the light sensor unit is grounded;

[0023] The fourth terminal of the single chip microcomputer is connected to the output terminal of the temperature and humidity sensing unit;

[0024] The fifth end of the single chip microcomputer is connected to the input end of the screen driving module, and the sixth end of the single chip microcomputer is connected to the input end of the transceiver module.

[0025] Optionally, the carbon dioxide sensing unit includes a carbon dioxide sensor with model number CO2-S8LP-0053.

[0026] Optionally, the temperature and humidity sensing unit includes a temperature and humidity sensor of model SHT30.

[0027] Optionally, the transceiver module includes a 485 transceiver of model MAX485;

[0028] One end of the 485 transceiver is connected to the sixth end of the single chip microcomputer, and the other end is connected to the host computer.

[0029] Optionally, the model of the single chip microcomputer is ESP32-S3-WROOM-1-N8.

[0030] Optionally, the screen driving module includes a first resistor, a second resistor, a MOS tube, a third resistor and a fourth resistor; the fifth end of the single chip microcomputer includes a first pin, a second pin, a third pin and a fourth pin;

[0031] The first pin is connected to one end of the first resistor, the other end of the first resistor is connected to the gate of the MOS transistor and one end of the second resistor, the drain of the MOS transistor and the other end of the second resistor are grounded, and the source of the MOS transistor is connected to the first input end of the display screen;

[0032] The second pin is connected to the second input terminal of the display screen, the third pin is connected to one end of the third resistor, and the other end of the third resistor is connected to the third input terminal of the display screen, and the fourth pin is connected to one end of the fourth resistor, and the other end of the fourth resistor is connected to the fourth input terminal of the display screen.

[0033] In a second aspect, the present application provides an electronic device equipped with the above-mentioned carbon dioxide transmitter control circuit.

[0034] By adopting the above technical solution, the present application first converts the 12V DC signal output by the external DC signal source into a 5V DC signal through the first conversion unit. The 5V DC signal is further converted into a 3.3V DC signal by the second conversion unit and input to the first input terminal of the processing module, and on the other hand, it powers the display screen;

[0035] The sensing module obtains external light parameters and carbon dioxide parameters and inputs them into the second input end of the processing module. The processing module will perform corresponding analysis. When the light parameter does not reach the preset light threshold, the carbon dioxide parameter will not be detected. The carbon dioxide parameter will only be detected when the light parameter meets the standard. Only when the carbon dioxide parameter does not reach the preset carbon dioxide threshold will the external carbon dioxide emitter be controlled to emit carbon dioxide through the first output end of the processing module until the carbon dioxide parameter reaches the preset carbon dioxide threshold.

[0036] To sum up, the beneficial effects of the present application are: when the lighting parameter does not reach the preset lighting threshold, the carbon dioxide parameter will not be detected, and the carbon dioxide sensor will be started to obtain the carbon dioxide parameter only when the lighting parameter meets the standard. Only when the carbon dioxide parameter does not reach the preset carbon dioxide threshold will the first output end of the processing module be used to control the external carbon dioxide transmitter to emit carbon dioxide until the carbon dioxide parameter reaches the preset carbon dioxide threshold, thereby controlling the carbon dioxide transmitter in the indoor environment control device to perform emission control only when there is light, so as to ensure efficient use of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a module connection diagram of a carbon dioxide transmitter control circuit provided in an embodiment of the present application;

[0038] Figure 2 This is a circuit schematic diagram of a power module of a carbon dioxide transmitter control circuit provided in an embodiment of the present application;

[0039] Figure 3 This is a circuit schematic diagram of the processing module, sensor module, and transceiver module of the carbon dioxide transmitter control circuit provided in an embodiment of the present application;

[0040] Figure 4 This is a circuit schematic diagram of the screen drive module of the carbon dioxide emitter control circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] The present application is further described below with reference to the accompanying drawings and examples.

[0042] The following will clearly and completely describe the concept, specific structure and technical effects of this application in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features created in this application can be combined interactively without conflicting with each other.

[0043] Reference Figure 1 , Figure 1 This is a module connection diagram of the carbon dioxide transmitter control circuit provided in an embodiment of the present application, including a power module, a sensor module, a processing module, a transceiver module, and a screen drive module, wherein:

[0044] Regarding the power supply module, the power supply module includes a first conversion unit and a second conversion unit; the input end of the first conversion unit is connected to an external DC signal source, and the output end is connected to the input end of the second conversion unit and the input end of the screen drive module, and the output end of the second conversion unit is connected to the first input end of the processing module.

[0045] Specifically, in the embodiment of the present application, the DC signal source is used to provide a 12V DC signal input. The first conversion unit includes a DC-DC step-down converter for converting the 12V DC signal into a 5V DC signal. The 5V DC signal is used to power an external display screen and is further input to the second conversion unit. The second conversion unit includes a low-voltage dropout linear regulator for converting the 5V DC signal into a 3.3V DC signal for input to the processing module. The secondary conversion by the low-voltage dropout linear regulator can improve the stability of the power supply.

[0046] Regarding the sensing module, the output end of the sensing module is connected to the second input end of the processing module, and is used to output the acquired environmental parameters to the processing module. The environmental parameters include light parameters and carbon dioxide parameters.

[0047] Specifically, the sensing module includes at least a carbon dioxide sensor and a light sensor, and in the embodiment of the present application, includes a carbon dioxide sensor, a light sensor, and a temperature and humidity sensor. In the present application, the carbon dioxide sensor is not continuously triggered, but is first detected by the light sensor and fed back to the processing module. The processing module will send a control signal to trigger the carbon dioxide sensor only when it recognizes that the light intensity collected by the light sensor reaches a preset light threshold. Then, if the carbon dioxide sensor recognizes that the concentration of the carbon dioxide parameter does not reach the preset carbon dioxide threshold, it will control the carbon dioxide transmitter to emit carbon dioxide. It can be seen that this solution avoids wasting energy to perform carbon dioxide parameter detection in the absence of sufficient light, and can also avoid wasting carbon dioxide stored in the carbon dioxide transmitter, thereby further ensuring efficient use of resources.

[0048] Regarding the transceiver module, the second output end of the processing module is connected to the input end of the transceiver module, and the output end of the transceiver module is connected to an external host computer.

[0049] Specifically, the various parameters collected by the processing module and the control signals sent are communicated with the host computer (such as PLC, PC) through the 485 transceiver in the transceiver module, thereby realizing human-computer interaction.

[0050] Regarding the screen driving module, the third input end of the processing module is connected to the input end of the screen driving module, and the output end of the screen driving module is connected to an external display screen.

[0051] Specifically, the screen drive module can transmit the collected relevant parameters and the current status of the relevant equipment to an external display screen, so that relevant users can understand the equipment status and the current situation of the indoor planting environment.

[0052] Further, refer to Figure 2 , Figure 2 This is a circuit schematic diagram of a power module of a carbon dioxide transmitter control circuit provided in an embodiment of the present application. The power module includes a first conversion unit and a second conversion unit. Specifically:

[0053] The first conversion unit includes a step-down converter U1, a first filtering subunit (capacitor C1, electrolytic capacitors E1 and E2), a frequency modulation subunit (resistor R2), a freewheeling subunit (freewheeling diode D1), an energy storage subunit (energy storage inductor L2) and a voltage divider subunit (resistors R3, R4, R5).

[0054] Specifically, in the embodiment of the present application, the model of the buck converter used is SL3061.

[0055] A first end of the buck converter is connected to a first end of the DC signal source, and a second end of the DC signal source is grounded.

[0056] Specifically, the DC signal source Vin sends a 12V DC signal from its pin 2 to the buck converter U1 , and its pin 1 is grounded to form a loop.

[0057] One end of the first filtering subunit is connected to the connection point between the DC signal source and the buck converter, and the other end is grounded.

[0058] Specifically, the first filtering subunit includes capacitor C1, electrolytic capacitors E1 and E2, wherein capacitor C1 and electrolytic capacitor E1 are used to filter the 12V DC signal, which is then input into the buck converter to obtain a 5V DC signal after filtering, and electrolytic capacitor E2 is used to filter the 5V DC signal, which is then output to the display screen and the second conversion unit after filtering.

[0059] One end of the frequency modulation subunit is connected to the second end of the buck converter, and the other end is grounded.

[0060] Specifically, a resistor R2 is connected to the second terminal (FS pin) of the buck converter to affect the internal oscillation frequency of the buck converter U1 and thus achieve frequency modulation.

[0061] The third end of the buck converter is connected to one end of the freewheeling subunit and one end of the energy storage subunit, the other end of the freewheeling subunit is grounded, and the other end of the energy storage subunit is connected to the input end of the second conversion unit and the input end of the screen drive module.

[0062] Specifically, the freewheeling subunit is the freewheeling diode D1, and the energy storage unit is the energy storage inductor L2. The positive pole of the freewheeling diode D1 is grounded, and the negative pole is connected to the third end (SW pin) of the buck converter; one end of the energy storage inductor L2 is connected to the connection between the freewheeling diode D1 and the buck converter U1, and the other end is connected to the voltage divider subunit, through which the 5V DC signal is transmitted to the display screen and the second conversion unit.

[0063] The connection between the energy storage subunit and the second conversion unit is connected to the first end of the voltage divider subunit, the second end of the voltage divider subunit is grounded, and the third end of the voltage divider subunit is connected to the fourth end of the buck converter.

[0064] Specifically, the voltage dividing subunit includes resistors R3, R4 and R5, which are used to divide the DC signal converted by the buck converter to obtain a 5V DC signal output.

[0065] Furthermore, the second conversion unit includes a low voltage dropout linear regulator and a second filtering subunit.

[0066] Specifically, the low-dropout linear regulator U5 used in the present application is of model CJT1117B, and the second filtering subunit includes a capacitor C2 and an electrolytic capacitor E3.

[0067] The input end of the low voltage difference linear regulator is connected to the connection point of the energy storage subunit and the voltage dividing subunit, and the output end of the low voltage difference linear regulator is connected to the first input end of the processing module.

[0068] Specifically, the input terminal (Vin pin) of the low voltage difference linear regulator U5 is connected to the output terminal of the first conversion unit, the ground terminal (GND pin) is grounded, and the output terminal (Vout pin) is connected to the first input terminal of the processing module.

[0069] One end of the second filtering subunit is connected to the connection point between the low voltage dropout linear regulator and the processing module, and the other end is grounded.

[0070] Specifically, the circuit stability is improved and interference signals are eliminated through ground filtering of a capacitor and an electrolytic capacitor.

[0071] Further, refer to Figure 3 , Figure 3 This is a circuit schematic diagram of the processing module, sensor module, and transceiver module of the carbon dioxide transmitter control circuit provided in an embodiment of the present application, wherein:

[0072] The processing module includes a single chip microcomputer; the sensing module includes a carbon dioxide sensing unit, a light sensing unit and a temperature and humidity sensing unit.

[0073] Specifically, the model of the microcontroller U2 used in the embodiment of the present application is ESP32-S3-WROOM-1-N8.

[0074] The first end of the single chip microcomputer is connected to the connection point between the low voltage difference linear regulator and the second filtering subunit.

[0075] Specifically, the first terminal (3.3V pin) of the microcontroller U2 is used to obtain the power supply voltage to maintain the operation of the microcontroller U2.

[0076] The second end of the single chip microcomputer is connected to the output end of the carbon dioxide sensor unit, the third end of the single chip microcomputer is connected to the input end of the light sensor unit, and the output end of the light sensor unit is grounded.

[0077] Specifically, the carbon dioxide sensing unit includes a carbon dioxide sensor model CO2-S8LP-0053. The carbon dioxide sensor CO2 includes a GND pin, a CAL pin, an RX pin, a TX pin and a Vdd pin, wherein the GND pin is grounded, and the other pins are respectively connected to an IO port of the microcontroller U2.

[0078] More specifically, the light sensing unit includes a photodiode and resistor R38. When the light intensity in the growing environment reaches a preset threshold, the photodiode turns on, causing a 3.3V DC signal to be divided down by resistor R38 and output to ground. Microcontroller U2 receives this information and sends a corresponding signal to the carbon dioxide sensor CO2, controlling its activation or deactivation. The preset light threshold is determined by the photodiode's device type, and users can select the appropriate type based on their needs.

[0079] The fourth terminal of the single chip microcomputer is connected to the output terminal of the temperature and humidity sensing unit.

[0080] Specifically, the temperature and humidity sensing unit includes an SHT30 temperature and humidity sensor U3. Pins 1 and 4 of the temperature and humidity sensor U3 are connected to an IO port on the microcontroller, respectively. Pins 2, 3, and 6 are left floating. Pin 5 is connected to the output of the second conversion unit, and pins 7 and 8 are connected to the programming port CN4. The temperature and humidity sensor U3 collects environmental temperature and humidity parameters and feeds them back to the processing module, which then feeds back to the host computer or display, enabling human-computer interaction.

[0081] The fifth terminal of the single chip microcomputer is connected to the input terminal of the screen driving module.

[0082] Specifically, the screen drive module includes four pins connected to the display screen, including RST_LCD (reset pin), SCL_LCD (clock pin), SDA_LCD (data line pin) and K_LCD (chip select pin). When K_LCD is pulled low, it means that the display screen connected to it is selected for communication; when K_LCD is pulled high, it means that there is no communication with the display screen at present.

[0083] The sixth terminal of the single chip microcomputer is connected to the input terminal of the transceiver module.

[0084] Specifically, the transceiver module includes a 485 transceiver U6. Pins 1, 2, 3, and 4 of the 485 transceiver U6 are respectively connected to an IO port of the microcontroller U2, pin 5 is grounded, pins 6 and 7 realize the transceiver output anchor link to an external host computer (such as a PLC), and pin 8 is connected to a 3.3V power supply (the output end of the second conversion unit).

[0085] More specifically, the model of the 485 transceiver U6 used in this application is MAX485.

[0086] Further, refer to Figure 4 , Figure 4This is a schematic diagram of the screen drive module of the carbon dioxide transmitter control circuit provided in an embodiment of the present application. It can be seen that the screen drive module includes a first resistor R17, a second resistor R18, a MOS transistor Q1, a third resistor R4, and a fourth resistor R3. The fifth terminal of the microcontroller U2 includes the first pin K_LCD, the second pin RST_LCD, the third pin SCL_LCD, and the fourth pin SDA_LCD.

[0087] The first pin is connected to one end of the first resistor, the other end of the first resistor is connected to the gate of the MOS tube and one end of the second resistor, the drain of the MOS tube and the other end of the second resistor are grounded, and the source of the MOS tube is connected to the first input end of the display screen.

[0088] Specifically, a corresponding control signal is output to the gate of the MOS transistor Q1 through the first resistor R17 and the second resistor R18, and the screen backlight is controlled by controlling the on and off of the MOS transistor Q1.

[0089] The second pin is connected to the second input terminal of the display screen, the third pin is connected to one end of the third resistor, and the other end of the third resistor is connected to the third input terminal of the display screen, and the fourth pin is connected to one end of the fourth resistor, and the other end of the fourth resistor is connected to the fourth input terminal of the display screen.

[0090] In a second aspect, the present application provides an electronic device equipped with the above-mentioned carbon dioxide emitter control circuit.

[0091] The above is a specific description of the preferred implementation of the present application, but the invention of the present application is not limited to the described embodiments. Technical personnel familiar with the art can also make various equivalent modifications or substitutions without violating the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A carbon dioxide transmitter control circuit, characterized in that: The circuit includes: a power supply module, a sensor module, a processing module, a transceiver module and a screen drive module; The power supply module includes a first conversion unit and a second conversion unit; the input end of the first conversion unit is connected to an external DC signal source, the output end is connected to the input end of the second conversion unit and the input end of the screen driving module, and the output end of the second conversion unit is connected to the first input end of the processing module; The output end of the sensing module is connected to the second input end of the processing module, and is used to output the acquired environmental parameters to the processing module, wherein the environmental parameters include light parameters and carbon dioxide parameters; The first output end of the processing module is connected to an external carbon dioxide emitter, and is used to determine a corresponding emitter control signal according to the illumination parameter and the carbon dioxide parameter to control the on / off of the carbon dioxide emitter load; The second output end of the processing module is connected to the input end of the transceiver module, and the output end of the transceiver module is connected to an external host computer; the third input end of the processing module is connected to the input end of the screen drive module, and the output end of the screen drive module is connected to an external display screen.

2. The carbon dioxide transmitter control circuit according to claim 1, characterized in that: The first conversion unit includes a buck converter, a first filtering subunit, a frequency modulation subunit, a freewheeling subunit, an energy storage subunit and a voltage divider subunit; the model of the buck converter is SL3061; The first end of the buck converter is connected to the first end of the DC signal source, and the second end of the DC signal source is grounded; One end of the first filtering subunit is connected to the connection point between the DC signal source and the buck converter, and the other end is grounded; One end of the frequency modulation subunit is connected to the second end of the buck converter, and the other end is grounded; The third end of the buck converter is connected to one end of the freewheeling subunit and one end of the energy storage subunit, the other end of the freewheeling subunit is grounded, and the other end of the energy storage subunit is connected to the input end of the second conversion unit and the input end of the screen driving module; The connection between the energy storage subunit and the second conversion unit is connected to the first end of the voltage divider subunit, the second end of the voltage divider subunit is grounded, and the third end of the voltage divider subunit is connected to the fourth end of the buck converter.

3. The carbon dioxide transmitter control circuit according to claim 2, characterized in that: The second conversion unit includes a low-voltage dropout linear regulator and a second filtering subunit; the model used by the low-voltage dropout linear regulator is CJT1117B; The input end of the low voltage difference linear regulator is connected to the connection point of the energy storage subunit and the voltage dividing subunit, and the output end of the low voltage difference linear regulator is connected to the first input end of the processing module; One end of the second filtering subunit is connected to the connection point between the low voltage dropout linear regulator and the processing module, and the other end is grounded.

4. The carbon dioxide transmitter control circuit according to claim 3, characterized in that: The processing module includes a single-chip microcomputer; the sensor module includes a carbon dioxide sensor unit, a light sensor unit, and a temperature and humidity sensor unit; the single-chip microcomputer model used is ESP32-S3-WROOM-1-N8; The first end of the single chip microcomputer is connected to the connection point between the low voltage drop linear regulator and the second filtering subunit; The second end of the single chip microcomputer is connected to the output end of the carbon dioxide sensor unit, the third end of the single chip microcomputer is connected to the input end of the light sensor unit, and the output end of the light sensor unit is grounded; The fourth terminal of the single chip microcomputer is connected to the output terminal of the temperature and humidity sensing unit; The fifth end of the single chip microcomputer is connected to the input end of the screen driving module, and the sixth end of the single chip microcomputer is connected to the input end of the transceiver module.

5. The carbon dioxide transmitter control circuit according to claim 4, characterized in that: The carbon dioxide sensing unit includes a carbon dioxide sensor with model number CO2-S8LP-0053.

6. The carbon dioxide transmitter control circuit according to claim 4, characterized in that: The temperature and humidity sensing unit includes a temperature and humidity sensor of model SHT30.

7. The carbon dioxide transmitter control circuit according to claim 4, characterized in that: The transceiver module includes a 485 transceiver of model MAX485; One end of the 485 transceiver is connected to the sixth end of the single chip microcomputer, and the other end is connected to the host computer.

8. The carbon dioxide transmitter control circuit according to claim 4, characterized in that: The screen driving module includes a first resistor, a second resistor, a MOS tube, a third resistor and a fourth resistor; The fifth end of the single chip computer includes a first pin, a second pin, a third pin and a fourth pin; The first pin is connected to one end of the first resistor, the other end of the first resistor is connected to the gate of the MOS transistor and one end of the second resistor, the drain of the MOS transistor and the other end of the second resistor are grounded, and the source of the MOS transistor is connected to the first input end of the display screen; The second pin is connected to the second input terminal of the display screen, the third pin is connected to one end of the third resistor, and the other end of the third resistor is connected to the third input terminal of the display screen, and the fourth pin is connected to one end of the fourth resistor, and the other end of the fourth resistor is connected to the fourth input terminal of the display screen.

9. An electronic device, characterized in that: The device is equipped with a carbon dioxide transmitter control circuit as described in any one of claims 1 to 8.

Images