This module supports UART interface and supports SP Bluetooth serial port protocol, which has low cost and small size.Low power consumption, high sensitivity of transmission and reception, and only a small number of peripheral components can achieve its powerful functions.
 
Common Pin:
  1>.Pin-1:UART_TXD.UART data output
  2>.Pin-2:UART_RXD.UART data input
  3>.Pin-11:RESETB.Reset/restart button
  4>.Pin-12:3.3V
  5>.Pin-13:GND
  6>.Pin-21:GND
  7>.Pin-22:GND
  8>.Pin-24:P12 LED pin (slow flash when not connected. Always lit after connection)
  9>.Pin-25:P12 host interrupt indication port, idle is low, the connection is high
 
Parameter:
  1>.Model: DX-BT04-A
  2>.Working frequency: 2.4GHz
  3>.Communication interface: UART 3.3V level
  4>.Working voltage: DC 3.0V-3.6V
  5>.RSSI: Not supported
  6>.Communication level: 3.3V
  7>.Transmit power: 4dBm (maximum)
  8>.Reference distance: 10m
  9>.Transmit current: 8.5mA
  10>.Accept current: 8.5mA
  11>.Air speed: 6Kbps
  12>.Antenna interface: Built-in PCB antenna
  13>.Low power current: 400uA
  14>.Receive sensitivity: .Working humidity: 10%-90%
  16>.Storage temperature: -40℃~85℃
  17>.Working temperature: -25℃~75℃
  18>.Module size:27*13*1.5mm