The main components of a BLE device are:

1. A Bluetooth Low Energy (BLE) radio: This is the hardware component responsible for sending and receiving data over the air. Examples include the Nordic Semiconductor nRF52840 SoC and the Qualcomm CSR8510.

2. A microcontroller: This is the processor that runs the software that controls the BLE radio and interacts with other components of the device. Examples include the Atmel ATmega328P and the STMicroelectronics STM32F103.

3. A power source: This is the component that supplies power to the device. Examples include a battery, a USB port, or a solar panel.

4. Sensors: These are the components that sense the environment and provide data to the microcontroller. Examples include temperature, light, and motion sensors.

5. Actuators: These are the components that take action based on data from the microcontroller. Examples include motors, LEDs, and speakers.

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