This HM-10 module is based on the TI CC2541 SoC and comes pre-mounted on an adapter board with onboard voltage regulation and pin headers. It enables easy Bluetooth Low Energy (BLE) communication with Arduino, ESP32, STM32, and other 5 V microcontrollers.

Specifications

• Bluetooth Version: 4.0 BLE (Bluetooth Low Energy)
• SoC: TI CC2541 (8051 core + BLE radio)
• Operating Voltage: 3.6 V–6 V (via onboard 3.3 V regulator)
• Logic Level: 3.3 V (safe for 5 V MCU RX via onboard divider)
• Communication Interface: UART (TXD, RXD)
• Default Baud Rate: 9600 (configurable via AT commands)
• Role: Peripheral (slave only)
• Range: ~10–20 m (open space)
• Power Consumption:
  - Active: ~8 mA
  - Sleep: ~400 μA
• Antenna: Onboard PCB antenna
• Adapter Features:
  - AMS1117 3.3 V regulator
  - Status LED
  - 6-pin header: VCC, GND, TXD, RXD, STATE, EN
• Dimensions: ~43 mm × 15 mm (with adapter)
• Firmware: Original HM-10 (AT command compatible)

Features

• BLE 4.0 UART communication with mobile devices and BLE hosts
• Adapter board with voltage regulator for 5 V Arduino compatibility
• AT command support for name, UUID, and baud rate configuration
• Plug-and-play with Arduino, ESP32, STM32, and Raspberry Pi
• Ideal for low-power wireless data exchange and BLE IoT projects
• Common use cases:
  - BLE sensor nodes and wearable electronics
  - Smartphone-controlled Arduino projects
  - Wireless UART bridges and automation systems
  - DIY BLE beacons and remote controls