HC-08 Bluetooth UART breakout

The HC-08 Bluetooth UART breakout is a compact Bluetooth 4.0 (BLE) serial module designed to simplify wireless serial communication for hobbyists, engineers and IoT projects.

• Key features & benefits: Low-power BLE operation and wide compatibility let you add wireless connectivity quickly without redesigning your board; built-in antenna and UART interface reduce integration time and complexity, helping you get prototypes working faster.
• Flexible configuration: Supports AT commands to change baud rate, role (master/slave) and device name so you can tailor behaviour to your application.
• Reliable range & performance: Operates at 2.4GHz ISM with up to 4dBm transmit power and -93dBm receiver sensitivity for long-range, stable links in open environments.

Use cases include wireless telemetry for sensors, remote serial debugging of microcontrollers, Bluetooth-to-UART bridges for mobile apps, and quick prototyping of smart devices. The module's low sleep current and BLE protocol make it ideal for battery-powered IoT sensors and wearables where long life matters.

Technical details: the HC-08 uses a CC2540-based BLE design, supports UART (3.3V TTL) with baud rates from low speeds up to 115200bps, and typical operating voltage is 2.0—3.6V (module-level). This breakout is sold under SKU MOD-204 and includes onboard LED status indication, solder-pin or through-hole mounting options, and an integrated PCB antenna for compact embedding.