The Bluetooth module is a PCBA board with integrated Bluetooth function, which is mainly composed of Bluetooth chips, PCB boards, and peripheral components, and is used for short-distance wireless communication. The Bluetooth module is mainly divided into the classic Bluetooth (BT) module and the Bluetooth low energy (BLE) module. The classic Bluetooth module is generally used to transmit a relatively large amount of data, such as voice, music, etc.; the low energy Bluetooth module is generally used to transmit small data Quantity, such as instructions, is widely used in smart homes, smart applications, etc. due to low power consumption and no frequent charging.