本设计中采用的蓝牙模块是4.0版本的，由于目前市场上蓝牙模块比较多，并

The Bluetooth module used in this design is version 4.0. Because there are many Bluetooth modules on the market and the price is more than 10 pieces, it is relatively cheap. Therefore, the finished module design is used directly. The Bluetooth module and the single chip are cross-connected. TXD corresponds to RXD connection, the serial port connection diagram is shown in Figure 2.8

The Bluetooth module used in this design is 4.0 version, because the current market Bluetooth module is more, and the price is more than 10 pieces, relatively cheap, so directuse the finished module design, Bluetooth module and microcontroller between the cross-connect, TXD corresponding to RXD this way of connection, serial connection diagram as shown in Figure 2.8

The Bluetooth module used in this design is version 4.0. At present, there are many Bluetooth modules in the market, and the price is more than 10, which is relatively cheap. Therefore, the finished module design is directly used. The Bluetooth module and the single-chip microcomputer are cross connected, and TXD is connected in the way of RXD. The schematic diagram of serial port connection is shown in Figure 2.8<br>