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Bluetooth Low Energy Module HM11- CC2541
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, des...
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
Jargon buster
Plain-language definitions for the technical terms used above.
- AT command set
- An AT command set is a text-based control language sent over a serial terminal to configure a device. It matters because you can change settings such as baud rate and flow control without writing custom firmware.
- baud
- Baud is the signalling rate of a serial connection, often used as the speed setting for UART communication. Matching the baud rate matters because both connected devices must use the same setting for readable data.
- BLE
- BLE stands for Bluetooth Low Energy, a Bluetooth mode designed for lower power use and modern phone compatibility. It matters because BLE support can make the module easier to use with Apple devices and battery-powered projects, though it may behave differently from classic serial Bluetooth.
- IoT
- Short for Internet of Things, meaning physical devices that connect to networks or the internet to send data or be controlled remotely. It matters if you want projects such as connected sensors, remote controls or classroom data-logging activities.
- PCB
- A printed circuit board is a rigid board with copper tracks that connect electronic parts without loose wires. For this kit, the PCBs also form the airplane shape, so they are both the circuit base and part of the finished model.
- UART
- UART is a simple serial connection that sends data over separate transmit and receive wires, often labelled TX and RX. It matters because this module is designed to replace a wired UART cable with a wireless link while keeping the same serial data format.
Find this product in
Connectivity
Related Tutorials
Free guides on learn.littlebird.com.au
