Robojax AT-09 Bluetooth 4.0 BLE Module (CC2541 Chip) – With Level Shifter, 3.3V/5V Compatible

Makers and tinkerers, this is a handy little Bluetooth module for your Arduino, Raspberry Pi, or other microcontroller projects. The Robojax AT-09 is based on the popular CC2541 BLE (Bluetooth Low Energy) chip and is compatible with the HM-10 command set. The coolest feature is the built-in level shifter circuit. That means you can power it with either 3.3V or 5V, and it will automatically match the logic levels for the RX/TX serial pins. No more worrying about frying your 3.3V MCU! It's small (about 37mm x 16mm) and communicates via simple UART serial – just connect TX to RX and RX to TX. Perfect for adding wireless control to robots, data logging sensors, smart home devices, or creating a wireless serial link. It's a bare module on a breakout board, so you might need to solder some headers or wires. A very popular and affordable way to add Bluetooth 4.0 connectivity to your DIY electronics. Just remember to check the pinout and set the correct baud rate in your code!