HYX BT8A module UART transmission manual, Bluetooth serial port module 3432

Product Overview

Description

  Low-power BLE 4.2 RF module based on the BLE series chip of Ti, which can communicate with Bluetooth device at very low total material cost, has low cost, low power consumption, small size, strong anti-interference ability and so on. The Bluetooth module supports transparent serial transmission and AT instruction, and only needs two pins (UART, UART) to communicate with user's MCU. When the module is launched, it will automatically broadcast, and the mobile device's APP will scan and connect it. After the connection is made, data can be transferred between the module and the mobile device via BLE. The user's MCU can communicate with the mobile device through the serial port of the module, and the mobile device can also write to the module through the APP, and the written data will be sent to the user's MCU through the serial port, the module receives the data from the user's MCU serial port and automatically forwards it to the mobile device.

  Main features: (1) simple operation, almost no bluetooth protocol knowledge can be developed Bluetooth wireless products (2) low cost, low power consumption. (3) the serial port supports big data packet transmission, the maximum support is 200bytes, long packet automatic sub-packet, packet loss rate is 0% (4) full-duplex two-way communication, baud rate 9600bps -115200bps; (5) user MCU can send AT instruction through serial port to obtain or modify the module parameters, such as MAC address, software reset module, adjust transmitting power, modify broadcast interval, modify BLE connection parameters, modified serial baud rate; (6) high-speed transmission, forwarding rate up to 4KB/s

  Conclusion: (1) if low power and long broadcast are needed, the A 5 can be lowered. (2) TX pins if the user needs the module to inform them before sending data (3) sleep wake if the user needs to control power consumption, need RX pin (wake-up pin)(4) if the user needs to know the working state of Bluetooth, can external LED (series connection 10 ~ 50k resistors)(5) if the user does not need the above function, just connect TXD/RXD. (6) restore the original password or restore the factory settings, c 5 pin output 1 second low level