AT-09 4.0 BLE Wireless bluetooth Module Serial Port CC2541

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