HC‑06 Bluetooth Module, Serial UART Slave, 2.0 + EDR, 3.3 V Logic, Module for Microcontroller Wireless COMs

The HC‑06 Bluetooth Module is a popular, low-cost serial communication (UART) module widely used to add wireless Bluetooth capability to microcontrollers such as Arduino, ESP32, and Raspberry Pi. It operates in slave mode, meaning it responds to connections initiated by a master device (e.g. phone, PC). Using Bluetooth 2.0 + EDR, it supports data transmission over the 2.402 GHz – 2.480 GHz range.

Key Features:

• Bluetooth 2.0 + EDR serial module for wireless UART communication
• Works in slave mode for receiving connections from master devices
• Onboard 3.3 V regulator / level converter to interface with 5 V systems
• Supports AT command set for configuration (baud, name, PIN)
• Compact module size with 4-pin interface (VCC, GND, TX, RX)
• Operates in 2.4 GHz ISM band with typical range ~10 m (line-of-sight)