Bluetooth module description Bluetooth module Baud rate Baud rate from 1200 to 1382400, specifically, you can refer to the baud rate list. ?? Level interface Answer: The module interface is the SPP level, the voltage is 3.3V. ?? How to connect directly to the RS232 level A: Since the interface of the Bluetooth module is SPP, it is necessary to add a max3232/sp3232 chip to the RS232. ?? Two modes of Blk-md-bc04-b Bluetooth module A. Direct replacement of serial cable B. and computer/mobile Bluetooth transparent serial port Refer to the Blk-md-bc04-b documentation ?? ?? How to do Bluetooth Windows serial programming A: The first use of Bluetooth driver to create a serial port, the operation is the same as the serial data transfer operation. ?? ?? Bluetooth distance?? Blk-md-bc04-b is the CLASS2 Bluetooth module, CLASS2 Bluetooth communication distance is 10 meters. ?? Bluetooth one-to-many operation mode Using Blk-md-bc04-b to achieve 1-to-many operations can refer to the Blk-md-bc04-b documentation. ?? Computer Bluetooth and Blk-md-bc04-b operating mode Answer: You can also refer to the Blk-md-bc04-b documentation. ?? ?? is the computer Bluetooth serial and Bluetooth module baud rate need to be consistent? A: Need to be consistent, need to ensure that the baud rate of the hardware connection is good. ?? ?? Advantages of Bluetooth data transfer: 1. Bluetooth data transmission is the use of 2.4G free frequency hopping technology, so in 2.4G wireless data transmission will not be affected by the same period of frequency interference 2. Data transmission process with CRC check mechanism to ensure the reliability of the packet 3. Data transmission is a re-sending mechanism, can make data transmission more reliable. ?? ?? The factors affected by Bluetooth transmission are 1. Impact of obstructions, especially metal shielding 2. The base plate of the Bluetooth module, it is recommended that the circuit board under the antenna of the module do not go the line and the floor, preferably floating. 3. Antenna position near Shell edge ?? ?? ?? Bluetooth module with at command: Can change the baud rate, Bluetooth name, Bluetooth pairing code through the AT command. PIO0 flashing before connection, PIO0 is high after successful connection. |
