Stage lamp wireless bluetooth pairing circuit

Abstract

The utility model discloses a stage lamp wireless bluetooth pairing circuit, including stage lamp side's stage lamp MCU module, stage lamp NFC module, stage lamp bluetooth module and main control equipment side's main control MCU module, main control NFC module, main control bluetooth module. When pairing, main control MCU sends to stage lamp NFC module through main control NFC module with the security code, main control equipment address, main control equipment name and bluetooth pairing password, stage lamp MCU receives and checks the security code, and after checking, writes the pairing information above into stage lamp bluetooth module, and replies to check the information through stage lamp NFC to main control MCU, and main control MCU receives confirmation, and address, name and password are transmitted to main control bluetooth module, make main control bluetooth and stage lamp bluetooth automatic pairing.

Description

Technical Field

[0001] This utility model relates to the field of stage lighting, and in particular to a wireless Bluetooth pairing circuit for stage lighting. Background Technology

[0002] In the ever-evolving stage lighting industry, an increasing number of new technologies and functions are being incorporated into stage lighting fixtures. Among these, wireless and Bluetooth technologies hold significant promise, eliminating the constraints of traditional stage lighting cables. Users and stage lighting fixtures are no longer confined to fixed positions by physical cables, allowing for free movement within a suitable range. This simplifies the usage environment, making it more streamlined and safer. It also increases portability, making stage lighting fixtures lighter, easier to carry, and easier to use. Thanks to these advantages, the use of wireless and Bluetooth functions in stage lighting fixtures has become widespread.

[0003] In existing wireless Bluetooth pairing circuits, stage lighting fixtures require individual pairing settings before they can connect to the corresponding wireless or Bluetooth devices when using both wireless and Bluetooth functions. This is to ensure accurate target device locking in complex wireless environments, guaranteeing users can connect to the desired stage lighting fixture. It also establishes an encrypted channel to protect communication privacy and security, preventing eavesdropping and unauthorized access. Pairing is sometimes used for service negotiation, where devices exchange information to ensure supported functions and services. While pairing is essential for both wireless and Bluetooth functions, switching master devices to connect all stage lighting fixtures requires users to disconnect the old master device and manually pair the new one. This process is time-consuming and prone to errors, inevitably leading to some stage lighting fixtures becoming uncontrollable. Utility Model Content

[0004] The purpose of this invention is to provide a stage light wireless Bluetooth pairing circuit that enables automatic wireless Bluetooth pairing between the main control device and multiple stage lights, thereby reducing the wireless Bluetooth pairing time.

[0005] The stage light wireless Bluetooth pairing circuit of this utility model includes a stage light MCU module, a stage light NFC module, and a stage light wireless Bluetooth module installed on the stage light, and a main control MCU module, a main control NFC module, and a main control wireless Bluetooth module installed on the main control device.

[0006] The main control MCU module sends the security code, main control device address, main control device name, and pairing password to the stage light NFC module via the main control NFC module; the main control NFC module receives the verification information and transmits the main control device address, main control device name, and pairing password to the main control wireless Bluetooth module, which then automatically pairs with the stage light wireless Bluetooth module.

[0007] The stage light MCU module receives the security code sent by the main control MCU module through the stage light NFC module for verification. If the verification is successful, the main control device address, main control device name, and pairing password are transmitted to the stage light wireless Bluetooth module, and the verification success information is sent to the main control MCU module through the stage light NFC module.

[0008] As a preferred embodiment of this utility model, the main control MCU module also sends the long-term password to the stage light NFC module via the main control NFC module and stores it in the stage light MCU.

[0009] As a preferred embodiment of this utility model, both the stage light MCU module and the main control MCU module use the same type of MCU chip; both the stage light NFC module and the main control NFC module use the same type of dynamic NFC tag IC; and both the stage light wireless Bluetooth module and the main control wireless Bluetooth module use the same type of wireless Bluetooth chip.

[0010] In a preferred embodiment of this utility model, the pins SDA, SCL, and GPIO of the MCU chip are electrically connected to the pins SDA, SCL, and GPIO of the dynamic NFC tag IC via the I2C protocol; the pins TX and RX of the MCU chip are electrically connected to the pins TXD and RXD of the wireless Bluetooth chip.

[0011] As a preferred embodiment of this utility model, both the stage light NFC module and the main control NFC module are equipped with a loop-shaped signal transceiver NFC antenna formed by several coils. The two ends of the NFC antenna are electrically connected to pins AC0 and AC1 of the dynamic NFC tag IC, respectively.

[0012] As a preferred embodiment of this utility model, the MCU chip U1 is also connected to a first indicator light that indicates that the verification has passed and a second indicator light that indicates that the verification has failed. The positive terminals of the first and second indicator lights are connected to a power supply, the negative terminal of the first indicator light is electrically connected to the GRE pin of the MCU chip, and the negative terminal of the second indicator light is electrically connected to the RED pin of the MCU chip.

[0013] As a preferred embodiment of this utility model, the MCU chip and the wireless Bluetooth chip are further connected by a drive circuit that restarts the wireless Bluetooth chip when the main control device and the stage light wireless Bluetooth cannot be paired. The drive circuit includes a first transistor and a second transistor. The base of the first transistor and the emitter of the second transistor are electrically connected to the DTR pin of the MCU chip. The emitter of the first transistor and the base of the second transistor are electrically connected to the RTS pin of the MCU chip. The collector of the first transistor is electrically connected to the EN pin of the wireless Bluetooth chip. The collector of the second transistor is electrically connected to the EN pin and the IO0 pin of the wireless Bluetooth chip.

[0014] The stage light wireless Bluetooth pairing circuit of this utility model involves the main control MCU module sending a security code, main control device address, main control device name, and pairing password to each stage light NFC module via the main control NFC module. The stage light MCU module verifies the security code; if verification is successful, the main control device address, main control device name, and pairing password are transmitted to the stage light wireless Bluetooth module, and the stage light NFC module sends verification success information to the main control MCU module. Then, the main control NFC module transmits the main control device address, main control device name, and pairing password to the main control wireless Bluetooth module. Since the main control wireless Bluetooth module's main control device address, main control device name, and pairing password are identical to those in the stage light wireless Bluetooth module, automatic pairing and connection are achieved between the main control wireless Bluetooth module and the stage light wireless Bluetooth module. This reduces the wireless Bluetooth pairing time between the main control device and multiple stage lights. Furthermore, if the security code verification fails, the main control device will not be able to pair, thus preventing operational errors and connection to the wrong stage light. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the wireless Bluetooth pairing circuit for the stage light of this utility model;

[0016] Figure 2 This is the circuit diagram of the MCU chip U1 of this utility model;

[0017] Figure 3 This is the circuit diagram of the dynamic NFC tag ICU2 of this utility model;

[0018] Figure 4 This is the circuit diagram of the wireless Bluetooth chip U3 of this utility model. Detailed Implementation

[0019] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] This embodiment provides a stage light wireless Bluetooth pairing circuit, such as... Figure 1 As shown, it includes a stage light MCU module, a stage light NFC module, and a stage light wireless Bluetooth module installed on the stage light, and a main control MCU module, a main control NFC module, and a main control wireless Bluetooth module installed on the main control device;

[0021] The main control MCU module sends the security code, main control device address, main control device name, and pairing password to the stage light NFC module via the main control NFC module; the main control NFC module receives the verification information and transmits the main control device address, main control device name, and pairing password to the main control wireless Bluetooth module, which then automatically pairs with the stage light wireless Bluetooth module.

[0022] The stage light MCU module receives the security code sent by the main control MCU module through the stage light NFC module for verification. If the verification is successful, the main control device address, main control device name, and pairing password are transmitted to the stage light wireless Bluetooth module, and the verification success information is sent to the main control MCU module through the stage light NFC module.

[0023] The main control MCU module also sends the long-term password to the stage light NFC module via the main control NFC module and stores it in the stage light MCU module. When an abnormality occurs or a restart is required, the main control device and the stage light can automatically connect by matching the long-term password, thereby reducing the wireless Bluetooth pairing time between the main control device and the stage light and improving work efficiency.

[0024] like Figure 2 - Figure 4 As shown, the stage light MCU module and the main control MCU module both use the same model of MCU chip U1; the stage light NFC module and the main control NFC module both use the same model of dynamic NFC tag ICU2; the stage light wireless Bluetooth module and the main control wireless Bluetooth module both use the same model of wireless Bluetooth chip U3.

[0025] Pins SDA, SCL, and GPIO of MCU chip U1 are electrically connected to pins SDA, SCL, and GPIO of dynamic NFC tag ICU2 via the I2C protocol; pins TX and RX of MCU chip U1 are electrically connected to pins TXD and RXD of wireless Bluetooth chip U3. MCU chip U1 is also connected to a first indicator LED1 indicating successful verification and a second indicator LED2 indicating failed verification. The positive terminals of the first indicator LED1 and the second indicator LED2 are connected to a 3.3V DC power supply, the negative terminal of the first indicator LED1 is electrically connected to pin GRE of MCU chip U1, and the negative terminal of the second indicator LED2 is electrically connected to pin RED of MCU chip U1.

[0026] MCU chip U1 communicates with dynamic NFC tag ICU2 via I2C connectors J1 / J2. In the circuit, transient Zener diode DZ1 protects the corresponding pins of both dynamic NFC tag ICU2 and MCU chip U1. Buck driver ICU4 reduces the voltage to 3.3V DC to power MCU chip U1 and also supplies power to dynamic NFC tag ICU2 via the connectors. Both the stage light NFC module and the main control NFC module are equipped with loop-shaped NFC antennas consisting of six coils. The two ends of the NFC antennas are electrically connected to pins AC0 and AC1 of dynamic NFC tag ICU2, respectively. When the stage light's dynamic NFC tag ICU2 converts the master device address, master device name, pairing password, and long-term password data received by the NFC antenna into I2C data and transmits it to the MCU chip U1, the MCU chip U1 will interpret the I2C data. The data starts with a security code and consists of 8 bits (i.e., 1 byte). The security code stored in the MCU chip U1 on the stage light is 0xFF, so the security code sent by the master device must also be 0xFF. If the verification is successful, subsequent data will be used; otherwise, it will be considered erroneous data and automatically invalidated.

[0027] After the security code is passed, the following data is the master control device address. Each master control device has a unique address, consisting of 48 bits (6 bytes), used to identify the target device during initial communication. Next is the master control device name, also consisting of 48 bits (6 bytes). While not mandatory, it helps confirm the master control device's identity. Then comes the pairing password, consisting of 16 bits (2 bytes), used to ensure both devices are user-authorized for the pairing. Finally, there is the long-term password, also consisting of 16 bits (2 bytes), primarily stored within the stage light's MCU module. This facilitates automatic subsequent connection after the initial pairing, via the master control device's MCU chip U1 and the stage light's MCU chip U1, through the Bluetooth chip U3.

[0028] In addition, after the MCU chip U1 receives the successful verification, its GRE pin is pulled low, causing the first indicator LED1 to light up green, clearly indicating to the user that the verification was successful. Conversely, if the security code verification is incorrect and the verification fails, the RED pin of the MCU chip U1 is pulled low, causing the second indicator LED2 to light up red, and then no further action is taken. This operation ensures the security of the stage light's wireless Bluetooth fast pairing solution, preventing incorrect connection of the main control device and unauthorized connection of external devices. The communication ICU5 is responsible for converting the data from the MCU chip U1 into a differential signal with stronger anti-interference capability and providing it to other functional components, such as the LED driver module, to control the operation of the stage lights.

[0029] The MCU chip U1 of the main control device receives the verification information and transmits the main control device address, main control device name, pairing password, and long-term password to the wireless Bluetooth chip U3 of the main control device via serial port TX / RX. At this time, the main control device's wireless Bluetooth chip U3 has the same main control device address, main control device name, pairing password, and long-term password as the wireless Bluetooth chip U3 on the stage light. Therefore, the wireless Bluetooth chip U3 of the main control device can automatically pair and connect with the wireless Bluetooth chip U3 of the stage light, thereby reducing the wireless Bluetooth pairing time between the main control device and multiple stage lights.

[0030] The MCU chip U1 and the wireless Bluetooth chip U3 are also connected by a drive circuit that restarts the wireless Bluetooth chip when the main control device cannot pair with the stage light wireless Bluetooth. The drive circuit includes a first transistor Q1 and a second transistor Q2. The base of the first transistor Q1 and the emitter of the second transistor Q2 are electrically connected to the DTR pin of the MCU chip U1. The emitter of the first transistor Q1 and the base of the second transistor Q2 are electrically connected to the RTS pin of the MCU chip U1. The collector of the first transistor Q1 is electrically connected to the EN pin of the wireless Bluetooth chip U3. The collector of the second transistor Q2 is electrically connected to the EN pin and the IO0 pin of the wireless Bluetooth chip U3.

[0031] In addition, the wireless Bluetooth chip U3 also features indicator lights LED4 and LED5 to indicate the wireless and Bluetooth modes. The positive terminals of LED4 and LED5 are connected to a 3.3V DC power supply, the negative terminal of LED4 is electrically connected to the GRE pin of the wireless Bluetooth chip U3, and the negative terminal of LED5 is electrically connected to the RED pin of the wireless Bluetooth chip U3. In wireless mode, the GRE pin of the wireless Bluetooth chip U3 is pulled low, and LED4 lights up; in Bluetooth mode, the RED pin of the wireless Bluetooth chip U3 is pulled low, and LED5 lights up. The wireless Bluetooth chip U3 generally operates normally by default. When an abnormality occurs, such as a failure to pair wirelessly and Bluetooth or data corruption, the MCU chip U1 will pull up the DTR pin. This turns on the first transistor Q1, causing the enable pin EN of the wireless Bluetooth chip U3 to go low, thus restarting the entire wireless Bluetooth chip U3. When the EN pin of the wireless Bluetooth chip U3 is pulled low, the RTS pin of the MCU chip U1 will be pulled high, the second transistor Q2 will be turned on, which will cause the DTR pin of the MCU chip U1 to be pulled low, the first transistor Q1 will be turned off, the EN pin of the wireless Bluetooth chip U3 will be pulled high, and the wireless Bluetooth chip U3 will resume operation.

[0032] In addition, the wireless Bluetooth chip U3 is equipped with an indicator light LED3. The positive terminal of LED3 is connected to pin IO4 of the wireless Bluetooth chip U3, and the negative terminal is grounded. This indicator light LED3 is used to indicate whether the wireless Bluetooth chip U3 is in normal working condition. If the indicator light LED3 is lit, the wireless Bluetooth chip U3 is working normally; otherwise, it is abnormal and needs to be repaired.

[0033] The above embodiments are only used to illustrate the detailed solution of this utility model. This utility model is not limited to the above detailed solution, that is, it does not mean that this utility model must rely on the above detailed solution to be implemented. Those skilled in the art should understand that any improvement to this utility model, equivalent substitution of the raw materials of this utility model product, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of this utility model.

Claims

1. A stage light wireless Bluetooth pairing circuit, characterized in that, This includes a stage light MCU module, a stage light NFC module, and a stage light wireless Bluetooth module installed on the stage light, and a main control MCU module, a main control NFC module, and a main control wireless Bluetooth module installed on the main control device; The main control MCU module sends the security code, main control device address, main control device name, and pairing password to the stage light NFC module via the main control NFC module; the main control NFC module receives the verification information and transmits the main control device address, main control device name, and pairing password to the main control wireless Bluetooth module, which then automatically pairs with the stage light wireless Bluetooth module. The stage light MCU module receives the security code sent by the main control MCU module through the stage light NFC module for verification. If the verification is successful, the main control device address, main control device name, and pairing password are transmitted to the stage light wireless Bluetooth module, and the verification success information is sent to the main control MCU module through the stage light NFC module.

2. The stage light wireless Bluetooth pairing circuit according to claim 1, characterized in that, The main control MCU module will also send the long-term password to the stage light NFC module via the main control NFC module, and store it in the stage light MC.

3. The stage light wireless Bluetooth pairing circuit according to any one of claims 1-2, characterized in that, Both the stage light MCU module and the main control MCU module use the same model of MCU chip (U1); both the stage light NFC module and the main control NFC module use the same model of dynamic NFC tag IC (U2); both the stage light wireless Bluetooth module and the main control wireless Bluetooth module use the same model of wireless Bluetooth chip (U3).

4. The stage light wireless Bluetooth pairing circuit according to claim 3, characterized in that, The SDA, SCL, and GPIO pins of the MCU chip (U1) are electrically connected to the SDA, SCL, and GPIO pins of the dynamic NFC tag IC (U2) via the I2C protocol; the TX and RX pins of the MCU chip (U1) are electrically connected to the TXD and RXD pins of the wireless Bluetooth chip (U3).

5. The stage light wireless Bluetooth pairing circuit according to claim 3, characterized in that, Both the stage light NFC module and the main control NFC module are equipped with a loop-shaped NFC antenna consisting of several coils. The two ends of the NFC antenna are electrically connected to pins AC0 and AC1 of the dynamic NFC tag IC (U2), respectively.

6. The stage light wireless Bluetooth pairing circuit according to claim 3, characterized in that, The MCU chip (U1) is also connected to a first indicator light (LED1) that indicates that the verification has passed and a second indicator light (LED2) that indicates that the verification has failed. The positive terminals of the first indicator light (LED1) and the second indicator light (LED2) are connected to the power supply. The negative terminal of the first indicator light (LED1) is electrically connected to the GRE pin of the MCU chip (U1), and the negative terminal of the second indicator light (LED2) is electrically connected to the RED pin of the MCU chip (U1).

7. The stage light wireless Bluetooth pairing circuit according to claim 3, characterized in that, The MCU chip (U1) and the wireless Bluetooth chip (U3) are also connected by a drive circuit that restarts the wireless Bluetooth chip when the main control device cannot pair with the stage light wireless Bluetooth. The drive circuit includes a first transistor (Q1) and a second transistor (Q2). The base of the first transistor (Q1) and the emitter of the second transistor (Q2) are electrically connected to the DTR pin of the MCU chip (U1). The emitter of the first transistor (Q1) and the base of the second transistor (Q2) are electrically connected to the RTS pin of the MCU chip (U1). The collector of the first transistor (Q1) is electrically connected to the EN pin of the wireless Bluetooth chip (U3). The collector of the second transistor (Q2) is electrically connected to the EN pin and the IO0 pin of the wireless Bluetooth chip (U3).

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