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Keyestudio HC-08 Bluetooth Master Slave Module Transceiver for Arduino Compatible with iOS and Android

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Keyestudio HC-08 Bluetooth module is a new digital transmission module, based on the Bluetooth Specification V4.0 BLE Bluetooth protocol.
Its wireless working frequency band is 2.4GHz ISM, and the modulation method is GFSK.
The module's default transmit power is 4dBm. Receive sensitivity -93dBm.
The module is compatible with both Android and Apple systems. In an open environment, it can communicate with iphone4s, to achieve ultra-long-distance communication of 80 meters. It also comes with an LED status indicator. When using, you can directly see the connection state of Bluetooth.
The module uses the CC2540F256 chip from TI, configured with 256K bytes of space, supporting the AT command. For need, the users can change the role (master or slave mode), baud rate of serial port, device name and other parameters, very flexible use.

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  • Working voltage: DC 5V

  • Working frequency band: 2.4G

  • Air speed: 1Mbps

  • Communication interface: UART3.3VTTL level

  • Antenna interface: built-in PCB antenna

  • Sleep current: 0.4μA

  • RSSI support: not supported

  • Receive sensitivity: -93dBm@1Mbps

  • Communication level: 3.3V

  • Bluetooth version: V4.0

  • Modulation method: GFSK

  • Transmit power: 4dBm (default)

  • Reference distance: 80m

  • Working temperature: -25℃ to +75℃

  • Working humidity: 10% to 90%

  • Storage temperature: -40℃ to +85℃

  • Working current (excluding LED)

  • Host not connected / connected: 21mA / 9mA

  • Slave MODE0, not connected / connected: 8.5mA/9mA

  • Slave MODE1, not connected / connected: 6μA ~ 2.6mA / 1.6mA

  • Slave MODE2, not connected / connected: 0.4μA/1.6mA


  • Compatible with Android and Apple System

  • Environmental-friendly

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