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Bluetooth module BT06: The BT06 Bluetooth module is designed for intelligent wireless data transmission and follows Bluetooth V2.1 specification. The module supports UART interface and supports SPP Bluetooth serial protocol. Low cost, small size, low power consumption and high sensitivity Features: Bluetooth V2.1 + EDR Bluetooth level 2 Built-in PCB RF antenna UART interface support 3.3 V power supply Application areas: This module is mainly used in the field of short-range wireless data transmission. It can be connected to a Bluetooth device Data exchange between the PC device and the two modules. Avoid heavy cable connections and replace them directly Serial line. Bluetooth wireless data transmission; Industrial telemetry and remote control; POS system, wireless keyboard and mouse; Traffic, underground positioning, alarm; Automatic data acquisition system; Wireless data transmission system; bank; Wireless data collection; Building automation, security equipment, wireless monitoring, access control systems; Smart home furniture, industrial control; Automatic detection equipment; Interactive television program voting equipment; Government energy saving lamp device Wireless display LED system Bluetooth joystick, gamepad Bluetooth printer Bluetooth remote control toy Automotive OBDII diagnostic instrument Physical characteristics: Operating Frequency Band 2.4GHz -2.48GHz unlicensed ISM band Bluetooth Specification V2. 1 +EDR Output Power Class Class 2 Operating Voltage 3.3V Host Interface UART Dimension 2 7 mm (L) x 13 (W) mm x 2mm (H) Power consumption: Application circuit diagram Host interrupt indication: P05 It is used to indicate whether the host is interrupted or not. The connection status is high and the other status is low. 8. LAYOUT considerations 1, SPP-CA Bluetooth module serial port level needs 3.3V, if you connect with 5V level system need to increase the level conversion chip. 2, Bluetooth signal is greatly affected by the surrounding, such as trees, metal, wall and other obstacles will have some absorption or shielding of the Bluetooth signal, so it is recommended not to install in the metal casing. 3, because the metal will weaken the antenna function, it is recommended that when the module is given to the Lay board, do not lay the ground and trace below the module antenna, it is best to hollow out