Irrigation controller with Bluetooth communication technology

Abstract

The utility model relates to an irrigation controller with a Bluetooth communication technology. The irrigation controller comprises a Bluetooth module; the electromagnetic valve driving module is connected to the Bluetooth module; a rainy day sensor, wherein the rainy day sensor is connected to the Bluetooth module; and the power supply module is connected to the Bluetooth module, the electromagnetic valve driving module and the rainy day sensor. The Bluetooth module can start the irrigation system for irrigation through the electromagnetic valve driving module, meanwhile, the Bluetooth module can be connected with a mobile phone of a user, the user can set the irrigation time and the irrigation water amount of the irrigation control valve through the mobile phone, and a rainy day sensor is arranged on the irrigation controller. Whether the current environment is in rainy days or not is detected, so that the irrigation controller can stop starting the irrigation system when the current environment is in rainy days, resource waste is avoided, and the operation cost of the irrigation system is reduced.

Description

Technical Field

[0001] The present application relates to the field of irrigation technology, and in particular to an irrigation controller with Bluetooth communication technology. Background Art

[0002] In irrigation systems, irrigation controllers are devices used to automatically control and manage irrigation systems. They automatically control the start and stop of irrigation systems and the amount of water according to preset schedules and irrigation needs in a programmed manner.

[0003] The existing irrigation system will only control the irrigation system according to the set time. Even if it is raining, when the irrigation time is reached, the irrigation controller will still start the irrigation system for irrigation, resulting in a waste of water and electricity resources and increasing the operating cost of the irrigation system. Utility Model Content

[0004] In view of the above problems, the present application provides an irrigation controller with Bluetooth communication technology to solve the problem that the existing irrigation controller will still start the irrigation system for irrigation when the irrigation time arrives on a rainy day, causing waste of resources and increased operating costs.

[0005] To achieve the above object, the inventor provides an irrigation controller with Bluetooth communication technology, comprising:

[0006] Bluetooth module;

[0007] A solenoid valve driving module, wherein the solenoid valve driving module is connected to the Bluetooth module;

[0008] A rain sensor connected to the Bluetooth module;

[0009] A power module is connected to the Bluetooth module, the solenoid valve drive module and the rain sensor.

[0010] In some embodiments, the power module comprises:

[0011] Battery cells;

[0012] An LDO buck circuit, wherein the input end of the LDO buck circuit is connected to the battery unit, and the output end of the LDO buck circuit is connected to the Bluetooth module and the rain sensor.

[0013] In some embodiments, the solenoid valve driving module includes:

[0014] A power control circuit, wherein an input end of the power control circuit is connected to the battery unit, and a control end of the power control circuit is connected to the Bluetooth module;

[0015] A boost circuit, wherein the input end of the boost circuit is connected to the output terminal of the power control circuit, and the enable end of the boost circuit is connected to the Bluetooth module;

[0016] The electromagnetic head driving circuit has a power supply end connected to the output section of the boost circuit, and a control end connected to the Bluetooth module.

[0017] In some embodiments, the power control circuit includes:

[0018] MOS tube U1, the source of the MOS tube U1 is connected to the battery unit;

[0019] A capacitor C1, one end of the capacitor C1 is connected to the source of the MOS transistor U1, and the other end of the capacitor C1 is connected to the gate of the MOS transistor U1;

[0020] A resistor R9, one end of which is connected to the gate of the MOS tube U1;

[0021] The transistor Q1 has a collector connected to the other end of the resistor R9, an emitter connected to the ground, and a base connected to the Bluetooth module.

[0022] In some embodiments, the electromagnetic head driving circuit is an H-bridge driving chip.

[0023] In some embodiments, there are multiple electromagnetic head driving circuits, and the control ends of the multiple electromagnetic head driving circuits are connected to the Bluetooth module through an IO expansion circuit.

[0024] In some embodiments, a human-computer interaction module is also included, and the human-computer interaction module is connected to the Bluetooth module.

[0025] In some embodiments, the human-computer interaction module includes a button unit and an LED indicator light.

[0026] Different from the existing technology, the above technical solution adopts a Bluetooth module as the control center of the irrigation controller, and powers the Bluetooth module, the solenoid valve drive module and the rain sensor through the power module. When the irrigation time is reached, the Bluetooth module can start the irrigation system for irrigation through the solenoid valve drive module. At the same time, the Bluetooth module can also be connected to the user's mobile phone, so that the user can set the irrigation time and irrigation water volume of the irrigation control valve through the mobile phone. A rain sensor is configured on the irrigation controller to detect whether the current environment is in rainy weather, so that when it is raining, the irrigation controller can stop starting the irrigation system to avoid waste of resources and reduce the operating cost of the irrigation system.

[0027] The above-mentioned records related to the content of the utility model are only an overview of the technical solution of the present application. In order to enable ordinary technicians in the field to more clearly understand the technical solution of the present application, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purpose and other purposes, features and advantages of the present application easier to understand, the following is an explanation in combination with the specific implementation method and drawings of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of the present application and other related contents, and shall not be considered as limitations of the present application.

[0029] In the drawings of the specification:

[0030] Figure 1 A structural schematic diagram of an irrigation controller with Bluetooth communication technology according to a specific implementation method;

[0031] Figure 2 Another structural schematic diagram of an irrigation controller with Bluetooth communication technology according to a specific implementation method;

[0032] Figure 3 A circuit schematic diagram of the Bluetooth module described in the specific implementation method;

[0033] Figure 4 A circuit schematic diagram of the rain sensor described in the specific implementation manner;

[0034] Figure 5 A circuit schematic diagram of the LDO buck circuit described in the specific implementation method;

[0035] Figure 6 A circuit schematic diagram of a power supply control circuit and a boost circuit described in a specific implementation manner;

[0036] Figure 7 A circuit schematic diagram of the electromagnetic head driving circuit described in the specific implementation method;

[0037] Figure 8 A circuit schematic diagram of the IO expansion circuit described in the specific implementation method;

[0038] Fig. 9 A circuit schematic diagram of the discharge circuit described in the specific implementation manner;

[0039] Fig.10 A circuit schematic diagram of the key unit described in the specific implementation method;

[0040] Fig.11 A circuit schematic diagram of the LED indicator light described in the specific implementation method;

[0041] Fig.12 A circuit schematic diagram of the voltage detection module described in the specific implementation manner;

[0042] Fig.13 A circuit schematic diagram of the download serial port described in the specific implementation method.

[0043] The reference numerals in the above drawings are described as follows:

[0044] 110. Bluetooth module,

[0045] 120. Solenoid valve drive module,

[0046] 121. Power supply control circuit,

[0047] 122. Boost circuit,

[0048] 123. Electromagnetic head drive circuit,

[0049] 130. Rain sensor,

[0050] 140, power module,

[0051] 141. Battery cell,

[0052] 142. LDO buck circuit,

[0053] 150. IO expansion circuit,

[0054] 161. Button unit,

[0055] 162. LED indicator light,

[0056] 170. Download the serial port. DETAILED DESCRIPTION

[0057] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0058] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0059] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0060] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0061] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0062] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0063] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0064] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0065] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0066] See also Figure 1-13 , this embodiment provides an irrigation controller with Bluetooth communication technology, including:

[0067] Bluetooth module 110;

[0068] A solenoid valve driving module 120 , wherein the solenoid valve driving module 120 is connected to the Bluetooth module 110 ;

[0069] A rain sensor 130 , wherein the rain sensor 130 is connected to the Bluetooth module 110 ;

[0070] The power module 140 is connected to the Bluetooth module 110 , the solenoid valve driving module 120 and the rain sensor 130 .

[0071] The Bluetooth module 110 is used as the control center of the irrigation controller. The power module 140 is used to power the Bluetooth module 110, the solenoid valve driving module 120 and the rain sensor 130. When the irrigation time is reached, the Bluetooth module 110 can start the irrigation system for irrigation through the solenoid valve driving module 120. At the same time, the Bluetooth module can also be connected to the user's mobile phone, so that the user can set the irrigation time and irrigation water volume of the irrigation control valve through the mobile phone. The rain sensor 130 is configured on the irrigation controller to detect whether the current environment is in a rainy day, so that when it is in a rainy day, the irrigation controller can stop starting the irrigation system to avoid waste of resources and reduce the operating cost of the irrigation system.

[0072] like Figure 3 As shown, in some embodiments, the Bluetooth module 110 uses a system-on-chip (SoC) for BLE 5.2 applications. It has an ARM 32-bit processor with 64K reserved SRAM, 128KB-8MB flash, 96KB ROM, 256-bit memory and ultra-low power, high-performance, multi-mode radio. In addition, the module can support BLE security, applications, and over-the-air download updates. It has serial peripheral IO and integrated application implementation.

[0073] like Figure 4 As shown, in some embodiments, the rain sensor 130 adopts a normally closed rain detection sensor, which can detect rainfall in real time and automatically close the solenoid valve after detecting rainfall to save water and battery power. The rain sensor 130 can be an optical detection device of a rain sensor 130 disclosed in the existing technical solution 202322643816.3.

[0074] like Figure 5 As shown, in some embodiments, the power module 140 includes:

[0075] Battery unit 141;

[0076] The LDO buck circuit 142 has an input end connected to the battery unit 141 , and an output end connected to the Bluetooth module 110 and the rain sensor 130 .

[0077] The power module 140 of the irrigation controller uses a battery unit 141 as a power supply. In this embodiment, the battery unit 141 uses four batteries, which can be dry batteries. The four dry batteries can be used for power supply, which can be used for more than one year, avoiding the trouble of frequent battery replacement. In other embodiments, the battery unit 141 can be a solar cell, a lithium battery, etc. The power output by the battery unit 141 is converted into a 3.3V power supply by the LD0 step-down unit to power the Bluetooth module 110 and other parts. In other embodiments, the power module 140 can also be connected to the mains for power supply. After the AC power of the mains is converted into 5V DC power by an adapter, it is stepped down to 3.3V by the LD0 step-down power supply to power the Bluetooth module and other components.

[0078] See also Figure 2 In some embodiments, the solenoid valve driving module 120 includes:

[0079] A power control circuit 121, wherein an input end of the power control circuit 121 is connected to the battery unit 141, and a control end of the power control circuit 121 is connected to the Bluetooth module 110;

[0080] A boost circuit 122, wherein an input end of the boost circuit 122 is connected to an output end of the power control circuit 121, and an enable end of the boost circuit 122 is connected to the Bluetooth module 110;

[0081] The electromagnetic head driving circuit 123 has a power supply end connected to the output section of the boost circuit 122 , and a control end of the electromagnetic head driving circuit 123 connected to the Bluetooth module 110 .

[0082] The solenoid valve driving module 120 includes a power control circuit 121, a boost circuit 122 and an electromagnetic head driving circuit 123. The power control circuit 121 supplies power to the boost circuit 122. When the solenoid valve and the corresponding circuit are not in use, the power supply is disconnected through the power control circuit 121, which can save electricity. The boost circuit 122 converts the voltage of the battery unit 141 into a voltage sufficient to drive the solenoid valve, ensuring that the solenoid valve can be stably opened and closed. The electromagnetic head driving circuit 123 cooperates with the output control port of the Bluetooth module 110 to realize the opening and closing operations of the solenoid valve.

[0083] See also Figure 6 In some embodiments, the power control circuit 121 includes:

[0084] MOS tube U1, the source of the MOS tube U1 is connected to the battery unit 141;

[0085] A capacitor C1, one end of the capacitor C1 is connected to the source of the MOS transistor U1, and the other end of the capacitor C1 is connected to the gate of the MOS transistor U1;

[0086] A resistor R9, one end of which is connected to the gate of the MOS tube U1;

[0087] The transistor Q1 has a collector connected to the other end of the resistor R9 , an emitter connected to the ground, and a base connected to the Bluetooth module 110 .

[0088] The power control circuit 121 is composed of the MOS tube U1, the capacitor C1, the resistor R9 and the transistor Q1, so as to realize soft start and limit the surge current.

[0089] See also Figure 7 In some embodiments, the electromagnetic head driving circuit 123 is an H-bridge driving chip. The electromagnetic head driving circuit 123 is composed of an H-bridge driving chip, and the electromagnetic valve can be opened or closed by using the H-bridge driving chip to output two levels of 10 and 00. In other embodiments, the electromagnetic head driving circuit 123 can also use other electromagnetic valve driving circuits.

[0090] See also Figure 7-8In some embodiments, there are multiple electromagnetic head drive circuits 123, and the control ends of the multiple electromagnetic head drive circuits 123 are connected to the Bluetooth module 110 through the IO expansion circuit 150. Among them, there are multiple electromagnetic head drive circuits 123, which can realize the control of multiple solenoid valves at the same time, and the control ends of the multiple electromagnetic head drive circuits 123 are connected to the Bluetooth module 110 through the IO expansion circuit 150, which can realize the control of multiple solenoid valves when the control ports of the Bluetooth module 110 are insufficient. In this embodiment, there are four electromagnetic head drive circuits 123, including H-bridge drive chips U3, U4, U5 and U6 respectively. In other embodiments, other numbers of electromagnetic head drive circuits 123 can also be used.

[0091] In some embodiments, a discharge circuit is also included, such as Fig. 9 As shown, the discharge circuit is composed of a MOS tube U13, a load unit composed of resistors R52 and R53, and a transistor Q3. The source of the MOS tube U13 is connected to the battery unit 141, the drain is connected to the load unit, the gate is connected to the collector of the transistor Q3, the emitter of the transistor Q3 is grounded, and the base is connected to the Bluetooth module 110.

[0092] In some embodiments, a human-computer interaction module is also included, and the human-computer interaction module is connected to the Bluetooth module 110 .

[0093] By configuring the human-computer interaction module, the user can use the human-computer interaction module to realize human-computer interaction. The user can know the current operation status of the irrigation controller through the human-computer interaction module, and the user can also manually set the irrigation controller. Fig.10 and Fig.11 , the human-computer interaction module includes a button unit 161 and an LED indicator light 162. The button unit 161 includes a Bluetooth button, a selection button and a Manual button. The Bluetooth connection function of the Bluetooth module can be activated through the Bluetooth button. The user can connect the Bluetooth module of the irrigation controller through a mobile phone and set the irrigation controller through the mobile phone. When the user needs to turn it on manually, he enters the manual function through the Manual button, and then performs manual irrigation through the selection button. The LED indicator light 162 includes a green LED indicator light 162 for indicating the Bluetooth pairing status, a red LED indicator light 162 for prompting a low power alarm, and a green LED indicator light 162 for indicating the irrigation status of each solenoid valve station. Among them, the number of green LED indicators 162 for indicating the irrigation status of each solenoid valve station is consistent with the number of electromagnetic head drive circuits 123.

[0094] See also Fig.12In some embodiments, a voltage detection module is also included. The voltage detection module includes a first voltage divider circuit and a second voltage divider circuit. The first voltage divider circuit includes resistors R34 and R41, and is used to detect the voltage output by the battery unit 141. When the voltage output by the battery unit 141 is insufficient, the Bluetooth module 110 issues a low-power alarm to remind the user to replace the battery. The second voltage divider circuit includes resistors R35 and R42, and is used to detect the voltage output by the boost circuit 122. When the Bluetooth module 110 detects through the second voltage divider circuit that the voltage output by the boost circuit 122 reaches the voltage for driving the electromagnetic head, the electromagnetic head driving circuit 123 is started to drive the corresponding electromagnetic valve.

[0095] See also Figure 2 and Fig.13 In some embodiments, the download serial port 170 is also included, and the download serial port 170 is connected to the Bluetooth module 110 to implement firmware update, debugging and configuration of the Bluetooth module 110.

[0096] In some embodiments, the irrigation controller can also realize the electromagnetic valve in-position detection function, and the electromagnetic valve detection can be judged by generating a lower driving voltage VBST, turning on the driving pulse for a short time and detecting the change of VBST. This can avoid malfunction during valve detection and reduce detection power consumption.

[0097] In some embodiments, an irrigation controller with Bluetooth communication technology is provided, which can be used in a variety of indoor and outdoor places that require irrigation, and has a solenoid valve access detection function, which can automatically identify the number of connected backwash solenoid valve stations without manually setting the number of stations. It is compatible with a variety of mainstream solenoid valves on the market, and users can flexibly equip different solenoid heads and valve bodies; it contains multiple adapters, including internal and external threads, and the external thread part is compatible with other brands of solenoid head thread mounting bases.

[0098] The irrigation controller uses a Bluetooth communication module to connect to the user's mobile phone, and the user sets and uses the APP. The APP can be used to set the irrigation plan, including the irrigation start time, irrigation duration (accurate to minutes) and irrigation frequency (daily, day of the week, interval within 30 days, hour interval), effective time and other parameters.

[0099] The setting data is sent to the irrigation controller via wireless Bluetooth, and the irrigation controller executes the plan to achieve the timed irrigation function.

[0100] The irrigation controller can also irrigate manually. When it is turned on manually, there is a default start time, and irrigation will automatically stop after the time is up (the default start time is set through the APP).

[0101] The irrigation controller uses a DC solenoid head to control the valve body switch water supply to meet the irrigation needs of indoor and outdoor environments. The irrigation controller is powered by dry batteries. Using 4 dry batteries for power supply, the battery power can be used for more than one year, avoiding the trouble of frequent battery replacement. It has a low-power detection function, which automatically closes the solenoid valve when low power is low, and reminds the user to replace new batteries.

[0102] Implementation principle:

[0103] 1. Power module 140; the device is powered by 4 batteries, which are converted into 3.3V by LDO circuit to power the Bluetooth module and other parts;

[0104] 2. Bluetooth module 110;

[0105] The module uses a system-on-chip (SoC) for BLE 5.2 applications. It has an ARM 32-bit processor with 64K reserved SRAM, 128KB-8MB flash, 96KB ROM, 256-bit memory and an ultra-low power, high-performance, multi-mode radio. In addition, the module can support BLE security, applications, and over-the-air updates. It has serial peripheral IO and integrated application implementation.

[0106] The module can automatically enter sleep mode and shut down relevant power-consuming parts to achieve low-power operation.

[0107] 3. Solenoid valve drive;

[0108] The solenoid valve driving part includes a power control circuit 121, a boost circuit 122, and a solenoid head driving circuit 123. The power control circuit 121 supplies power to the boost circuit 122. When the solenoid valve and the corresponding circuit are not in use, turning off the power supply can save electricity.

[0109] The boost circuit 122 converts the battery voltage into a voltage sufficient to drive the solenoid valve, ensuring that the solenoid valve can be stably opened and closed. The solenoid head drive circuit 123 is composed of an H-bridge drive chip, and can realize the opening and closing operation of the solenoid valve in conjunction with the output control port of the Bluetooth module 110.

[0110] 4. Rain sensor 130;

[0111] Equipped with a normally closed rain detection sensor, which can detect rainfall in real time and automatically close the solenoid valve after detecting rainfall to save water and battery power;

[0112] 5. Human-computer interaction;

[0113] The panel has three touch buttons for users to operate, namely Bluetooth button, selection button, and Manual button. The panel has a green LED to indicate the Bluetooth pairing status and a red LED to indicate low battery alarm. There are also 4 green LEDs to indicate the irrigation status of each valve station.

[0114] 6. Solenoid valve in-place detection;

[0115] The solenoid valve detection can be judged by generating a lower driving voltage VBST, turning on the driving pulse for a short time and detecting the change of VBST. This can avoid malfunction during valve detection and reduce detection power consumption.

[0116] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concept of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. An irrigation controller with Bluetooth communication technology, characterized in that: include: Bluetooth module; A solenoid valve driving module, wherein the solenoid valve driving module is connected to the Bluetooth module; A rain sensor connected to the Bluetooth module; A power module is connected to the Bluetooth module, the solenoid valve drive module and the rain sensor.

2. The irrigation controller with Bluetooth communication technology according to claim 1, characterized in that: The power module comprises: Battery cells; An LDO buck circuit, wherein the input end of the LDO buck circuit is connected to the battery unit, and the output end of the LDO buck circuit is connected to the Bluetooth module and the rain sensor.

3. The irrigation controller with Bluetooth communication technology according to claim 2, characterized in that: The solenoid valve driving module comprises: A power control circuit, wherein an input end of the power control circuit is connected to the battery unit, and a control end of the power control circuit is connected to the Bluetooth module; A boost circuit, wherein the input end of the boost circuit is connected to the output end of the power control circuit, and the enable end of the boost circuit is connected to the Bluetooth module; The electromagnetic head driving circuit has a power supply end connected to the output section of the boost circuit, and a control end connected to the Bluetooth module.

4. The irrigation controller with Bluetooth communication technology according to claim 3, characterized in that: The power control circuit comprises: MOS tube U1, the source of the MOS tube U1 is connected to the battery unit; A capacitor C1, one end of the capacitor C1 is connected to the source of the MOS transistor U1, and the other end of the capacitor C1 is connected to the gate of the MOS transistor U1; A resistor R9, one end of which is connected to the gate of the MOS tube U1; The transistor Q1 has a collector connected to the other end of the resistor R9, an emitter connected to the ground, and a base connected to the Bluetooth module.

5. The irrigation controller with Bluetooth communication technology according to claim 3, characterized in that: The electromagnetic head driving circuit is an H-bridge driving chip.

6. The irrigation controller with Bluetooth communication technology according to claim 3, characterized in that: There are multiple electromagnetic head driving circuits, and the control ends of the multiple electromagnetic head driving circuits are connected to the Bluetooth module through an IO expansion circuit.

7. The irrigation controller with Bluetooth communication technology according to claim 1, characterized in that: It also includes a human-computer interaction module, which is connected to the Bluetooth module.

8. The irrigation controller with Bluetooth communication technology according to claim 7, characterized in that: The human-computer interaction module includes a button unit and an LED indicator light.

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