Bluetooth Mate 4.0 - HM-13

The Bluetooth Mate 4.0 is a serial Bluetooth module built around the HM-13, supporting both SPP (Serial Port Profile) and BLE (Bluetooth Low Energy) via Bluetooth 4.0. It works as a transparent serial data gateway, letting you wirelessly connect microcontrollers to smartphones, computers, or other Bluetooth devices.

The board includes onboard voltage regulation and level shifting, so it interfaces directly with both 3.3V and 5V microcontrollers. Communication is handled via serial UART, and configuration is done through AT commands. Dual-mode operation allows simultaneous connections to two devices.

Key Features

• Bluetooth 4.0 Dual-Mode – Supports both SPP and BLE profiles simultaneously
• HM-13 Module – BLE compatibility with smartphones plus classic SPP for computers
• Onboard Voltage Regulation – Works with both 3.3V and 5V microcontrollers
• Level Shifting Included – No additional circuitry needed for 5V systems
• Serial UART Interface – Simple serial communication with AT command configuration
• Connection Status LED – Green LED blinks at 1Hz when disconnected, solid when connected
• iBeacon Support – Can be configured as a Bluetooth iBeacon
• Pre-configured Baud Rate – Set to 9600 bps for easy SoftwareSerial use

Ideal For

• Wireless serial communication with Arduino and other microcontrollers
• Smartphone-controlled IoT projects via BLE
• Wireless data logging and sensor monitoring
• Replacing wired serial connections with Bluetooth

Package Contents

• 1× Bluetooth Mate 4.0 (HM-13)

Resources

• HM-13 Arduino Library (GitHub)