Backplane Serial BLE CC2540 CC2541 Serial Wireless Bluetooth Module iBeacon AT-09 4.0 for Arduino

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  • Input voltage: 3.3V/5V only needs a set of power supply ; Built in level conversion function.
  • If you use MCU 5.0V and Bluetooth module communication, 5.0V power supply port, TX RX logic level 5V
  • If you use MCU 3.3V and Bluetooth module communication, 3.3V power supply port, TX RX logic level 3.3V
  • RX, Bluetooth module serial receiver and TXD MCU connection.
  • TX, Bluetooth module serial port and RXD MCU connection.

 

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