HC-08 Bluetooth 4.0 BLE Serial Port Module

Description

The HC-08 Bluetooth 4.0 BLE Serial Port Module is a cost-effective wireless transceiver designed for developers and makers needing reliable, low-energy data links. Built around the proven CC2540 system-on-chip (SoC) from Texas Instruments, it implements the Bluetooth Low Energy 4.0 standard, prioritizing minimal power draw over high data throughput. This makes it exceptionally suitable for Internet of Things (IoT) applications where devices must operate for extended periods on small batteries, transmitting small packets of sensor data.

Communication is handled via a straightforward 3.3V TTL UART interface, allowing seamless connection to most modern microcontrollers without requiring complex RF design knowledge. The module’s firmware supports a comprehensive set of AT commands, enabling runtime configuration of critical parameters such as device name, role (master/slave), serial baud rate, and pairing modes. With a reference range of up to 80 meters in open air and a maximum transmit power of 4 dBm, it provides a robust wireless link for indoor and outdoor deployments.