Description
Product Description
The HC-05 (Type-A) is a highly reliable and industry-standard Bluetooth 2.0+EDR (Enhanced Data Rate) module designed for wireless serial communication. As a “Master/Slave” dual-role module, the HC-05 is superior to the HC-06 because it can not only receive connections from phones and PCs but can also proactively search for and connect to other Bluetooth devices.
The Type-A configuration is characterized by its high compatibility with various microcontroller ecosystems. It features an onboard button that facilitates entry into AT Command Mode, allowing users to customize parameters such as the device name, pairing password (PIN), and communication speed (Baud Rate). Built on a 6-pin breakout board with an integrated 3.3V LDO regulator, it is designed for “plug-and-play” use with 5V systems like Arduino and industrial controllers.
Key Features
- Dual-Role Versatility: Can be configured via AT commands to act as a Master (initiates connections) or a Slave (receives connections).
- Simplified Configuration: The onboard physical button allows for easy entry into configuration mode without complex hardware “jumping” or high-level coding.
- High Compatibility: Optimized firmware ensures stable performance across a wide range of platforms including Arduino, STM32, Raspberry Pi, and PC-based serial terminals.
- Robust Connection: Features GFSK modulation and Adaptive Frequency Hopping to minimize interference in crowded 2.4GHz environments.
- Visual Status Indicator: An onboard LED provides real-time feedback: fast blinking (searching), slow blinking (AT mode), and double-blinking (paired/connected).
- Safe Voltage Range: The baseboard handles 3.6V to 6V input, making it compatible with both battery power and standard USB power rails.
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