DORHEA 5PCS BLE 4.0 Bluetooth Module AT-09 for Ardu-ino CC2540 CC2541 BLE Serial Wireless Module Compatible with HM-10

Feature: 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 GND, ground terminal Wakeup module settings are three ways: Method 1: You can activate the module by sending a string of about 80 characters. The activation string sent cannot contain the AT command. After a successful wake-up, the serial port will output the string """"+WAKE\r\nOK\r\n"""". Method 2: Short press the system button SW1. Method 3: Direct pairing connection. System button pin (P1_3) description P1_3 is the input pin. Short press the control to achieve the following functions: 1. When the module is in the sleep state: The module will be awakened to the normal state. After successful wake-up, the serial port will output the “+WAKE\r\nOK\”r\n string. 2. When the module is in the connected state: the module will initiate a disconnect request. Package Include: 5 X CC2540 CC2541 AT-09 Bluetooth 4.0 BLE Module