The HM-11 is a Bluetooth Low Energy (BLE 4.0) module based on the TI CC2541 microprocessor. It provides wireless communication with smartphones, tablets, desktop computers, and other embedded systems via a simple UART serial interface with AT command control. The XBee-compatible form factor makes it easy to integrate into existing designs.

Configurable as master or slave, with adjustable baud rate, device name, pairing password, and transmit power levels. Effective range is up to 30 metres in open environments.

Key Features

• Bluetooth 4.0 BLE – Low-power wireless communication
• CC2541 Processor – TI's proven BLE SoC
• XBee Form Factor – Drop-in compatible with XBee sockets
• UART Interface – Simple serial (TTL) communication
• AT Command Set – Configure role, baud rate, name, password, and TX power
• Adjustable TX Power – −23 dBm to +6 dBm
• 30 m Range – In open environments

Specifications

• Bluetooth Version: 4.0 BLE
• Processor: TI CC2541
• Frequency: 2.4 GHz ISM band
• Modulation: GFSK
• Interface: UART (TTL)
• Supply Voltage: 3.3 V DC
• Current Draw: 50 mA
• Operating Temperature: −5 °C to +65 °C
• PCB Size: 24.5 × 30.5 × 0.8 mm
• Certifications: FCC, CE, RoHS

Ideal For

• BLE communication with iOS and Android apps
• Wireless sensor and data logging projects
• IoT prototyping with XBee-compatible sockets
• Remote control and monitoring applications

Package Contents

• 1× HM-11 Bluetooth Low Energy Module

Resources

• HM-11 Datasheet (PDF)
• CC2541 Datasheet (TI)
• AT Command Reference
• Arduino Demo Code