3pcs AT-09 4.0 BLE Wireless bluetooth Module Serial Port CC2541 Compatible HM-10 Module Connecting Single Chip Microcomputer

Features: - bluetooth 4.0 module Serial port extraction bluetooth BLE CC2540 CC2541 - The bluetooth module has a backplane, and the HM-10 module is used on this module. - 5V power supply or 3.3V power supply. The serial port level is the same as the power supply voltage. - Built-in level shifting function. Specifications: - Input voltage: 3.3V/5V - If a 5.0V MCU is used to communicate with the bluetooth module, the 5.0V power port is powered, and the RX TX logic level is 5V. - If a 3.3V MCU is used to communicate with the bluetooth module, the 3.3V power port is powered, and the RX TX logic level is 3.3V. Pin: RX, the serial port receiving end of the bluetooth module is connected to the TXD of the MCU. TX, the serial port sender of the bluetooth module is connected to the RXD of the MCU. GND, ground terminal negative 3.3V, 3.3V power supply at the power supply 5V, power supply 5V power supply Package Incleded: 3 x AT-09 4.0 BLE Wireless bluetooth Module