DFRobot TEL0026 Bluetooth 2.0 Module V3 For Arduino

The DF-BluetoothV3 Bluetooth module uses a unique double-board design to help prevent electrostatic damage to the module. It is designed to have two DC power inputs: a wide voltage supply (3.5 to 8V) and a 3.3V power supply, making it suitable for a wide variety of applications.STATE LINK is indicated by a bright LED which is used to display module status and connection status (STATE state: Search state (high 104ms 342ms 2.9Hz cycle flicker) connection status (high 104ms period 2s 0.5Hz flashing), LINK state: paired.) It has a built-in on-board antenna which provides high quality signals.A DIP switch is used to set the module status, LED Off to turn off the LINK light to enter power-saving mode, AT Mode allows the module to enter AT command mode. AT commands can modify the baud rate and the master and slave mode.The module has been tested for compatibility with most Bluetooth adapters on the market (Bluetooth dongle, including laptops and mobile phones). The module has been tested with, and is compatible with Android Phones. Two modules can be used as a 'pair' to produce a transparent serial data communication link.